2.6.27-rc3-git3: Reported regressions from 2.6.26

2.6.27-rc3-git3: Reported regressions from 2.6.26

[Rafael J. Wysocki]

This message contains a list of some regressions from 2.6.26, for which there
are no fixes in the mainline I know of.  If any of them have been fixed already,
please let me know.

If you know of any other unresolved regressions from 2.6.26, please let me know
either and I'll add them to the list.  Also, please let me know if any of the
entries below are invalid.

Each entry from the list will be sent additionally in an automatic reply to
this message with CCs to the people involved in reporting and handling the
issue.


Listed regressions statistics:

  Date          Total  Pending  Unresolved
  ----------------------------------------
  2008-08-16      103       47          37
  2008-08-10       80       52          31
  2008-08-02       47       31          20


Unresolved regressions
----------------------

Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11356
Subject		: Linux 2.6.27-rc3 - build failure: undefined reference to `.lockdep_count_forward_deps'
Submitter	: Frans Pop <elendil@planet.nl>
Date		: 2008-08-16 19:11 (1 days old)
References	: http://marc.info/?l=linux-kernel&m=121891396320127&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11355
Subject		: Regression in 2.6.27-rc2 when cross-building the kernel
Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
Date		: 2008-08-16 2:38 (1 days old)
References	: http://marc.info/?l=linux-kernel&m=121885432118368&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11354
Subject		: AMD Elan regression with 2.6.27-rc3
Submitter	: Sean Young <sean@mess.org>
Date		: 2008-08-15 18:37 (2 days old)
References	: http://marc.info/?l=linux-kernel&m=121882578430056&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11344
Subject		: lockdep link failed
Submitter	: Ming Lei <tom.leiming@gmail.com>
Date		: 2008-08-14 9:58 (3 days old)
References	: http://marc.info/?l=linux-kernel&m=121870792715847&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11343
Subject		: SATA Cold Boot Problems with 2.6.27-rc[23] on nVidia 680i
Submitter	: Manny Maxwell <mannymax@mannymax.net>
Date		: 2008-08-14 4:16 (3 days old)
References	: http://marc.info/?l=linux-kernel&m=121868782917600&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11341
Subject		: 2.6.27-rc1 - ext4 e2fsck false prompting for fixing i_size of Inode
Submitter	: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Date		: 2008-08-13 6:56 (4 days old)
References	: http://marc.info/?l=linux-kernel&m=121861058720051&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11340
Subject		: LTP overnight run resulted in unusable box
Submitter	: Alexey Dobriyan <adobriyan@gmail.com>
Date		: 2008-08-13 9:24 (4 days old)
References	: http://marc.info/?l=linux-kernel&m=121861951902949&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11339
Subject		: Only one of my cpus seems to powered down by cpufreq
Submitter	: Torsten Kaiser <just.for.lkml@googlemail.com>
Date		: 2008-08-13 20:18 (4 days old)
References	: http://marc.info/?l=linux-kernel&m=121865907511340&w=4
Handled-By	: Langsdorf, Mark <mark.langsdorf@amd.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11338
Subject		: ia64 allmodconfig on current mainline
Submitter	: Andrew Morton <akpm@linux-foundation.org>
Date		: 2008-08-12 22:06 (5 days old)
References	: http://marc.info/?l=linux-ia64&m=121857881314455&w=4
Handled-By	: Luck, Tony <tony.luck@intel.com>
		  Robin Holt <holt@sgi.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11337
Subject		: Warning in during hotplug on 2.6.27-rc2-git5
Submitter	: Mark Langsdorf <mark.langsdorf@amd.com>
Date		: 2008-08-12 21:56 (5 days old)
References	: http://marc.info/?l=linux-kernel&m=121857820413373&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11336
Subject		: 2.6.27-rc2:stall while mounting root fs
Submitter	: Torsten Kaiser <just.for.lkml@googlemail.com>
Date		: 2008-08-12 12:37 (5 days old)
References	: http://marc.info/?l=linux-kernel&m=121854484015909&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11335
Subject		: 2.6.27-rc2-git5 BUG: unable to handle kernel paging request
Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
Date		: 2008-08-12 4:18 (5 days old)
References	: http://marc.info/?l=linux-kernel&m=121851477201960&w=4
Handled-By	: Hugh Dickins <hugh@veritas.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11334
Subject		: myri10ge: use ioremap_wc: compilation failure on ARM
Submitter	: Martin Michlmayr <tbm@cyrius.com>
Date		: 2008-08-10 11:25 (7 days old)
References	: http://marc.info/?l=linux-netdev&m=121836771727632&w=2
Handled-By	: Brice Goglin <brice@myri.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11333
Subject		: Rewrite SSB DMA API breaks compilation on ARM
Submitter	: Martin Michlmayr <tbm@cyrius.com>
Date		: 2008-08-10 12:16 (7 days old)
References	: http://marc.info/?l=linux-wireless&m=121837082431460&w=2


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11313
Subject		: Plugging HDMI causes "unable to handle kernel paging request"
Submitter	: Rafał Miłecki <zajec5@gmail.com>
Date		: 2008-08-12 14:30 (5 days old)


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11308
Subject		: tbench regression on each kernel release from 2.6.22 -&gt; 2.6.28
Submitter	: Christoph Lameter <cl@linux-foundation.org>
Date		: 2008-08-11 18:36 (6 days old)
References	: http://marc.info/?l=linux-kernel&m=121847986119495&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11296
Subject		: 2.6.27-rc2-git4: suspend and power off fails on Asus M3A32-MVP
Submitter	: Rafael J. Wysocki <rjw@sisk.pl>
Date		: 2008-08-09 21:21 (8 days old)
References	: http://marc.info/?l=linux-kernel&m=121831675111794&w=4
Handled-By	: Langsdorf, Mark <mark.langsdorf@amd.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11293
Subject		: 2.6.27-rc2: suspend regression on EeePC
Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date		: 2008-08-06 18:59 (11 days old)
References	: http://thread.gmane.org/gmane.linux.kernel.kernel-testers/701


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11282
Subject		: Please fix x86 defconfig regression
Submitter	: Andi Kleen <andi@firstfloor.org>
Date		: 2008-08-07 20:46 (10 days old)
References	: http://marc.info/?l=linux-kernel&m=121814188805666&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11279
Subject		: 2.6.27-rc0 Power Bugs with HP/Compaq Laptops
Submitter	: Matt Parnell <mparnell@gmail.com>
Date		: 2008-08-07 14:57 (10 days old)
References	: http://marc.info/?l=linux-kernel&m=121812108031685&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11278
Subject		: 2.6.27-rc2: Very odd top: '5124095h kthreadd' display
Submitter	: Grant Coady <grant_lkml@dodo.com.au>
Date		: 2008-08-07 7:03 (10 days old)
References	: http://marc.info/?l=linux-kernel&m=121809267318795&w=4
Handled-By	: Peter Zijlstra <peterz@infradead.org>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11272
Subject		: BUG: parport_serial in 2.6.27-rc1 for NetMos Technology PCI 9835
Submitter	: Jaswinder Singh <jaswinderlinux@gmail.com>
Date		: 2008-08-05 15:12 (12 days old)
References	: http://marc.info/?l=linux-kernel&m=121794900319776&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11271
Subject		: BUG: fealnx in 2.6.27-rc1
Submitter	: Jaswinder Singh <jaswinderlinux@gmail.com>
Date		: 2008-08-05 14:58 (12 days old)
References	: http://marc.info/?l=linux-netdev&m=121794762016830&w=4
		  http://lkml.org/lkml/2008/8/10/98
Handled-By	: Francois Romieu <romieu@fr.zoreil.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11264
Subject		: Invalid op opcode in kernel/workqueue
Submitter	: Jean-Luc Coulon <jean.luc.coulon@gmail.com>
Date		: 2008-08-07 04:18 (10 days old)


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11263
Subject		: Re: 2.6.27-rc2: uvcvideo WARNING after suspend to ram
Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date		: 2008-08-07 04:02 (10 days old)
References	: http://comments.gmane.org/gmane.linux.kernel/717552


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11245
Subject		: acpi error on 2.6.27-rc1+ (ACPI Error (dsobject-0501))
Submitter	: Marcin Slusarz <marcin.slusarz@gmail.com>
Date		: 2008-08-03 18:29 (14 days old)
References	: http://marc.info/?l=linux-kernel&m=121778823123488&w=4
Handled-By	: Zhang Rui <rui.zhang@intel.com>
		  Zhao Yakui <yakui.zhao@intel.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11237
Subject		: corrupt PMD after resume
Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date		: 2008-08-02 9:51 (15 days old)
References	: http://marc.info/?l=linux-kernel&m=121767073424952&w=4
Handled-By	: Hugh Dickins <hugh@veritas.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11230
Subject		: Kconfig no longer outputs a .config with freshly updated defconfigs
Submitter	: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Date		: 2008-08-02 16:03 (15 days old)
References	: http://marc.info/?l=linux-kernel&m=121769306319391&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11224
Subject		: Only three cores found on quad-core machine.
Submitter	: Dave Jones <davej@redhat.com>
Date		: 2008-08-01 18:15 (16 days old)
References	: http://marc.info/?l=linux-kernel&m=121761475224719&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11220
Subject		: Heavy suspend and io problems in 2.6.27-rc1-00156-g94ad374
Submitter	: Nico Schottelius <nico@schottelius.org>
Date		: 2008-07-31 21:05 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121753882422899&w=4
Handled-By	: Rafael J. Wysocki <rjw@sisk.pl>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11219
Subject		: KVM modules break emergency reboot
Submitter	: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Date		: 2008-08-01 20:25 (16 days old)
References	: http://marc.info/?l=linux-kernel&m=121762241105336&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11215
Subject		: INFO: possible recursive locking detected ps2_command
Submitter	: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Date		: 2008-07-31 9:41 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121749737011637&w=4
Handled-By	: Peter Zijlstra <a.p.zijlstra@chello.nl>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11210
Subject		: libata badness
Submitter	: Kumar Gala <galak@kernel.crashing.org>
Date		: 2008-07-31 18:53 (17 days old)
References	: http://marc.info/?l=linux-ide&m=121753059307310&w=4
Handled-By	: Ben Dooks <ben-linux@fluff.org>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11209
Subject		: 2.6.27-rc1 process time accounting
Submitter	: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Date		: 2008-07-31 10:43 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121750102917490&w=4
Handled-By	: Peter Zijlstra <a.p.zijlstra@chello.nl>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11207
Subject		: VolanoMark regression with 2.6.27-rc1
Submitter	: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
Date		: 2008-07-31 3:20 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121747464114335&w=4
Handled-By	: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
		  Peter Zijlstra <a.p.zijlstra@chello.nl>
		  Dhaval Giani <dhaval@linux.vnet.ibm.com>
		  Miao Xie <miaox@cn.fujitsu.com>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11191
Subject		: 2.6.26-git8: spinlock lockup in c1e_idle()
Submitter	: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Date		: 2008-07-24 03:22 (24 days old)
References	: http://lkml.org/lkml/2008/7/23/317
Handled-By	: Thomas Gleixner <tglx@linutronix.de>


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11141
Subject		: no battery or DC status - Dell i1501
Submitter	: Gu Rui <chaos.proton@gmail.com>
Date		: 2008-07-21 19:43 (27 days old)
Handled-By	: Zhao Yakui <yakui.zhao@intel.com>


Regressions with patches
------------------------

Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11346
Subject		: kernel BUG at arch/x86/mm/pat.c:233!
Submitter	: Jean Delvare <khali@linux-fr.org>
Date		: 2008-08-15 02:10 (2 days old)
Handled-By	: Andi Kleen <andi@firstfloor.org>
Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17270&action=view


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11330
Subject		: int3: 0000 in tsc_read_refs when using powernow_k7
Submitter	: Mikko Vinni <mmvinni@yahoo.com>
Date		: 2008-08-14 04:21 (3 days old)
Patch		: http://bugzilla.kernel.org/show_bug.cgi?id=11330#c2


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11323
Subject		: /proc/diskstats does not contain all disk devices
Submitter	: Andy Ryan <genanr@emsphone.com>
Date		: 2008-08-13 12:12 (4 days old)
Handled-By	: Greg Kroah-Hartman <greg@kroah.com>
		  Kay Sievers <kay.sievers@vrfy.org>
Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17257&action=view


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11316
Subject		: severe performance regression for iptables nat routing
Submitter	: Alex Williamson <alex.williamson@hp.com>
Date		: 2008-08-12 22:04 (5 days old)
Handled-By	: Herbert Xu <herbert@gondor.apana.org.au>
Patch		: http://bugzilla.kernel.org/show_bug.cgi?id=11316#c15
		  http://bugzilla.kernel.org/show_bug.cgi?id=11316#c16


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11276
Subject		: build error: CONFIG_OPTIMIZE_INLINING=y causes gcc 4.2 to do stupid things
Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
Date		: 2008-08-06 17:18 (11 days old)
References	: http://marc.info/?l=linux-kernel&m=121804329014332&w=4
		  http://lkml.org/lkml/2008/7/22/353
Handled-By	: Bjorn Helgaas <bjorn.helgaas@hp.com>
Patch		: http://lkml.org/lkml/2008/7/22/364


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11260
Subject		: Regression: USB memory stick triggers several USB resets before settling with bogus capacity
Submitter	: Alex Villacis Lasso <avillaci@ceibo.fiec.espol.edu.ec>
Date		: 2008-08-06 13:33 (11 days old)
Handled-By	: Hugh Dickins <hugh@veritas.com>
Patch		: http://marc.info/?l=linux-kernel&m=121804333614405&w=2


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11254
Subject		: KVM: fix userspace ABI breakage
Submitter	: Adrian Bunk <bunk@kernel.org>
Date		: 21 Jul 2008 17:58:26 (0 days old)
References	: http://lkml.org/lkml/2008/7/21/197
Handled-By	: Adrian Bunk <bunk@kernel.org>
Patch		: http://lkml.org/lkml/2008/7/21/197


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11228
Subject		: p54usb broken by commit b19fa1f
Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
Date		: 2008-08-02 3:06 (15 days old)
References	: http://marc.info/?l=linux-kernel&m=121764647801783&w=4
Handled-By	: Larry Finger <Larry.Finger@lwfinger.net>
Patch		: http://marc.info/?l=linux-kernel&m=121779445431434&w=4


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11205
Subject		: x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more
Submitter	: Mikael Pettersson <mikpe@it.uu.se>
Date		: 2008-07-30 11:02 (18 days old)
References	: http://marc.info/?l=linux-kernel&m=121741584608240&w=4
Handled-By	: Mikael Pettersson <mikpe@it.uu.se>
Patch		: http://marc.info/?l=linux-kernel&m=121742199419686&w=2


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11189
Subject		: sky2 WOL broken
Submitter	: Rafael J. Wysocki <rjw@sisk.pl>
Date		: 2008-07-20 0:20:10 (28 days old)
References	: http://marc.info/?l=linux-next&m=121651311115104&w=4
Handled-By	: Stephen Hemminger <shemminger@vyatta.com>
		  Rafael J. Wysocki <rjw@sisk.pl>
Patch		: http://marc.info/?l=linux-kernel&m=121838931923267&w=4


For details, please visit the bug entries and follow the links given in
references.

As you can see, there is a Bugzilla entry for each of the listed regressions.
There also is a Bugzilla entry used for tracking the regressions from 2.6.26,
unresolved as well as resolved, at:

http://bugzilla.kernel.org/show_bug.cgi?id=11167

Please let me know if there are any Bugzilla entries that should be added to
the list in there.

Thanks,
Rafael

[Bug #11141] no battery or DC status - Dell i1501

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11141
Subject		: no battery or DC status - Dell i1501
Submitter	: Gu Rui <chaos.proton@gmail.com>
Date		: 2008-07-21 19:43 (27 days old)
Handled-By	: Zhao Yakui <yakui.zhao@intel.com>

[Bug #11207] VolanoMark regression with 2.6.27-rc1

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11207
Subject		: VolanoMark regression with 2.6.27-rc1
Submitter	: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
Date		: 2008-07-31 3:20 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121747464114335&w=4
Handled-By	: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
		  Peter Zijlstra <a.p.zijlstra@chello.nl>
		  Dhaval Giani <dhaval@linux.vnet.ibm.com>
		  Miao Xie <miaox@cn.fujitsu.com>

[Bug #11191] 2.6.26-git8: spinlock lockup in c1e_idle()

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11191
Subject		: 2.6.26-git8: spinlock lockup in c1e_idle()
Submitter	: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Date		: 2008-07-24 03:22 (24 days old)
References	: http://lkml.org/lkml/2008/7/23/317
Handled-By	: Thomas Gleixner <tglx@linutronix.de>

[Bug #11189] sky2 WOL broken

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11189
Subject		: sky2 WOL broken
Submitter	: Rafael J. Wysocki <rjw@sisk.pl>
Date		: 2008-07-20 0:20:10 (28 days old)
References	: http://marc.info/?l=linux-next&m=121651311115104&w=4
Handled-By	: Stephen Hemminger <shemminger@vyatta.com>
		  Rafael J. Wysocki <rjw@sisk.pl>
Patch		: http://marc.info/?l=linux-kernel&m=121838931923267&w=4

[Bug #11209] 2.6.27-rc1 process time accounting

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11209
Subject		: 2.6.27-rc1 process time accounting
Submitter	: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Date		: 2008-07-31 10:43 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121750102917490&w=4
Handled-By	: Peter Zijlstra <a.p.zijlstra@chello.nl>

[Bug #11205] x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11205
Subject		: x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more
Submitter	: Mikael Pettersson <mikpe@it.uu.se>
Date		: 2008-07-30 11:02 (18 days old)
References	: http://marc.info/?l=linux-kernel&m=121741584608240&w=4
Handled-By	: Mikael Pettersson <mikpe@it.uu.se>
Patch		: http://marc.info/?l=linux-kernel&m=121742199419686&w=2

[Bug #11210] libata badness

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11210
Subject		: libata badness
Submitter	: Kumar Gala <galak@kernel.crashing.org>
Date		: 2008-07-31 18:53 (17 days old)
References	: http://marc.info/?l=linux-ide&m=121753059307310&w=4
Handled-By	: Ben Dooks <ben-linux@fluff.org>

[Bug #11224] Only three cores found on quad-core machine.

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11224
Subject		: Only three cores found on quad-core machine.
Submitter	: Dave Jones <davej@redhat.com>
Date		: 2008-08-01 18:15 (16 days old)
References	: http://marc.info/?l=linux-kernel&m=121761475224719&w=4

[Bug #11219] KVM modules break emergency reboot

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11219
Subject		: KVM modules break emergency reboot
Submitter	: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Date		: 2008-08-01 20:25 (16 days old)
References	: http://marc.info/?l=linux-kernel&m=121762241105336&w=4

[Bug #11220] Heavy suspend and io problems in 2.6.27-rc1-00156-g94ad374

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11220
Subject		: Heavy suspend and io problems in 2.6.27-rc1-00156-g94ad374
Submitter	: Nico Schottelius <nico@schottelius.org>
Date		: 2008-07-31 21:05 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121753882422899&w=4
Handled-By	: Rafael J. Wysocki <rjw@sisk.pl>

[Bug #11215] INFO: possible recursive locking detected ps2_command

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11215
Subject		: INFO: possible recursive locking detected ps2_command
Submitter	: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Date		: 2008-07-31 9:41 (17 days old)
References	: http://marc.info/?l=linux-kernel&m=121749737011637&w=4
Handled-By	: Peter Zijlstra <a.p.zijlstra@chello.nl>

[Bug #11228] p54usb broken by commit b19fa1f

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11228
Subject		: p54usb broken by commit b19fa1f
Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
Date		: 2008-08-02 3:06 (15 days old)
References	: http://marc.info/?l=linux-kernel&m=121764647801783&w=4
Handled-By	: Larry Finger <Larry.Finger@lwfinger.net>
Patch		: http://marc.info/?l=linux-kernel&m=121779445431434&w=4

[Bug #11230] Kconfig no longer outputs a .config with freshly updated defconfigs

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11230
Subject		: Kconfig no longer outputs a .config with freshly updated defconfigs
Submitter	: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Date		: 2008-08-02 16:03 (15 days old)
References	: http://marc.info/?l=linux-kernel&m=121769306319391&w=4

[Bug #11237] corrupt PMD after resume

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11237
Subject		: corrupt PMD after resume
Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date		: 2008-08-02 9:51 (15 days old)
References	: http://marc.info/?l=linux-kernel&m=121767073424952&w=4
Handled-By	: Hugh Dickins <hugh@veritas.com>

[Bug #11245] acpi error on 2.6.27-rc1+ (ACPI Error (dsobject-0501))

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11245
Subject		: acpi error on 2.6.27-rc1+ (ACPI Error (dsobject-0501))
Submitter	: Marcin Slusarz <marcin.slusarz@gmail.com>
Date		: 2008-08-03 18:29 (14 days old)
References	: http://marc.info/?l=linux-kernel&m=121778823123488&w=4
Handled-By	: Zhang Rui <rui.zhang@intel.com>
		  Zhao Yakui <yakui.zhao@intel.com>

[Bug #11254] KVM: fix userspace ABI breakage

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11254
Subject		: KVM: fix userspace ABI breakage
Submitter	: Adrian Bunk <bunk@kernel.org>
Date		: 21 Jul 2008 17:58:26 (0 days old)
References	: http://lkml.org/lkml/2008/7/21/197
Handled-By	: Adrian Bunk <bunk@kernel.org>
Patch		: http://lkml.org/lkml/2008/7/21/197

[Bug #11260] Regression: USB memory stick triggers several USB resets before settling with bogus capacity

[Rafael J. Wysocki]

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of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11260
Subject		: Regression: USB memory stick triggers several USB resets before settling with bogus capacity
Submitter	: Alex Villacis Lasso <avillaci@ceibo.fiec.espol.edu.ec>
Date		: 2008-08-06 13:33 (11 days old)
Handled-By	: Hugh Dickins <hugh@veritas.com>
Patch		: http://marc.info/?l=linux-kernel&m=121804333614405&w=2

[Bug #11263] Re: 2.6.27-rc2: uvcvideo WARNING after suspend to ram

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11263
Subject		: Re: 2.6.27-rc2: uvcvideo WARNING after suspend to ram
Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date		: 2008-08-07 04:02 (10 days old)
References	: http://comments.gmane.org/gmane.linux.kernel/717552

[Bug #11271] BUG: fealnx in 2.6.27-rc1

[Rafael J. Wysocki]

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of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11271
Subject		: BUG: fealnx in 2.6.27-rc1
Submitter	: Jaswinder Singh <jaswinderlinux@gmail.com>
Date		: 2008-08-05 14:58 (12 days old)
References	: http://marc.info/?l=linux-netdev&m=121794762016830&w=4
		  http://lkml.org/lkml/2008/8/10/98
Handled-By	: Francois Romieu <romieu@fr.zoreil.com>

[Bug #11264] Invalid op opcode in kernel/workqueue

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11264
Subject		: Invalid op opcode in kernel/workqueue
Submitter	: Jean-Luc Coulon <jean.luc.coulon@gmail.com>
Date		: 2008-08-07 04:18 (10 days old)

[Bug #11276] build error: CONFIG_OPTIMIZE_INLINING=y causes gcc 4.2 to do stupid things

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11276
Subject		: build error: CONFIG_OPTIMIZE_INLINING=y causes gcc 4.2 to do stupid things
Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
Date		: 2008-08-06 17:18 (11 days old)
References	: http://marc.info/?l=linux-kernel&m=121804329014332&w=4
		  http://lkml.org/lkml/2008/7/22/353
Handled-By	: Bjorn Helgaas <bjorn.helgaas@hp.com>
Patch		: http://lkml.org/lkml/2008/7/22/364

[Bug #11272] BUG: parport_serial in 2.6.27-rc1 for NetMos Technology PCI 9835

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11272
Subject		: BUG: parport_serial in 2.6.27-rc1 for NetMos Technology PCI 9835
Submitter	: Jaswinder Singh <jaswinderlinux@gmail.com>
Date		: 2008-08-05 15:12 (12 days old)
References	: http://marc.info/?l=linux-kernel&m=121794900319776&w=4

[Bug #11282] Please fix x86 defconfig regression

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11282
Subject		: Please fix x86 defconfig regression
Submitter	: Andi Kleen <andi@firstfloor.org>
Date		: 2008-08-07 20:46 (10 days old)
References	: http://marc.info/?l=linux-kernel&m=121814188805666&w=4

[Bug #11278] 2.6.27-rc2: Very odd top: '5124095h kthreadd' display

[Rafael J. Wysocki]

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of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11278
Subject		: 2.6.27-rc2: Very odd top: '5124095h kthreadd' display
Submitter	: Grant Coady <grant_lkml@dodo.com.au>
Date		: 2008-08-07 7:03 (10 days old)
References	: http://marc.info/?l=linux-kernel&m=121809267318795&w=4
Handled-By	: Peter Zijlstra <peterz@infradead.org>

[Bug #11279] 2.6.27-rc0 Power Bugs with HP/Compaq Laptops

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11279
Subject		: 2.6.27-rc0 Power Bugs with HP/Compaq Laptops
Submitter	: Matt Parnell <mparnell@gmail.com>
Date		: 2008-08-07 14:57 (10 days old)
References	: http://marc.info/?l=linux-kernel&m=121812108031685&w=4

[Bug #11293] 2.6.27-rc2: suspend regression on EeePC

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11293
Subject		: 2.6.27-rc2: suspend regression on EeePC
Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Date		: 2008-08-06 18:59 (11 days old)
References	: http://thread.gmane.org/gmane.linux.kernel.kernel-testers/701

[Bug #11296] 2.6.27-rc2-git4: suspend and power off fails on Asus M3A32-MVP

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11296
Subject		: 2.6.27-rc2-git4: suspend and power off fails on Asus M3A32-MVP
Submitter	: Rafael J. Wysocki <rjw@sisk.pl>
Date		: 2008-08-09 21:21 (8 days old)
References	: http://marc.info/?l=linux-kernel&m=121831675111794&w=4
Handled-By	: Langsdorf, Mark <mark.langsdorf@amd.com>

[Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28

[Rafael J. Wysocki]

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of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11308
Subject		: tbench regression on each kernel release from 2.6.22 -> 2.6.28
Submitter	: Christoph Lameter <cl@linux-foundation.org>
Date		: 2008-08-11 18:36 (6 days old)
References	: http://marc.info/?l=linux-kernel&m=121847986119495&w=4

[Bug #11316] severe performance regression for iptables nat routing

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11316
Subject		: severe performance regression for iptables nat routing
Submitter	: Alex Williamson <alex.williamson@hp.com>
Date		: 2008-08-12 22:04 (5 days old)
Handled-By	: Herbert Xu <herbert@gondor.apana.org.au>
Patch		: http://bugzilla.kernel.org/show_bug.cgi?id=11316#c15
		  http://bugzilla.kernel.org/show_bug.cgi?id=11316#c16

[Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11313
Subject		: Plugging HDMI causes "unable to handle kernel paging request"
Submitter	: Rafał Miłecki <zajec5@gmail.com>
Date		: 2008-08-12 14:30 (5 days old)

[Bug #11323] /proc/diskstats does not contain all disk devices

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11323
Subject		: /proc/diskstats does not contain all disk devices
Submitter	: Andy Ryan <genanr@emsphone.com>
Date		: 2008-08-13 12:12 (4 days old)
Handled-By	: Greg Kroah-Hartman <greg@kroah.com>
		  Kay Sievers <kay.sievers@vrfy.org>
Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17257&action=view

[Bug #11330] int3: 0000 in tsc_read_refs when using powernow_k7

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11330
Subject		: int3: 0000 in tsc_read_refs when using powernow_k7
Submitter	: Mikko Vinni <mmvinni@yahoo.com>
Date		: 2008-08-14 04:21 (3 days old)
Patch		: http://bugzilla.kernel.org/show_bug.cgi?id=11330#c2

[Bug #11335] 2.6.27-rc2-git5 BUG: unable to handle kernel paging request

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11335
Subject		: 2.6.27-rc2-git5 BUG: unable to handle kernel paging request
Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
Date		: 2008-08-12 4:18 (5 days old)
References	: http://marc.info/?l=linux-kernel&m=121851477201960&w=4
Handled-By	: Hugh Dickins <hugh@veritas.com>

[Bug #11334] myri10ge: use ioremap_wc: compilation failure on ARM

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11334
Subject		: myri10ge: use ioremap_wc: compilation failure on ARM
Submitter	: Martin Michlmayr <tbm@cyrius.com>
Date		: 2008-08-10 11:25 (7 days old)
References	: http://marc.info/?l=linux-netdev&m=121836771727632&w=2
Handled-By	: Brice Goglin <brice@myri.com>

[Bug #11333] Rewrite SSB DMA API breaks compilation on ARM

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11333
Subject		: Rewrite SSB DMA API breaks compilation on ARM
Submitter	: Martin Michlmayr <tbm@cyrius.com>
Date		: 2008-08-10 12:16 (7 days old)
References	: http://marc.info/?l=linux-wireless&m=121837082431460&w=2

[Bug #11336] 2.6.27-rc2:stall while mounting root fs

[Rafael J. Wysocki]

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from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11336
Subject		: 2.6.27-rc2:stall while mounting root fs
Submitter	: Torsten Kaiser <just.for.lkml@googlemail.com>
Date		: 2008-08-12 12:37 (5 days old)
References	: http://marc.info/?l=linux-kernel&m=121854484015909&w=4

[Bug #11337] Warning in during hotplug on 2.6.27-rc2-git5

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11337
Subject		: Warning in during hotplug on 2.6.27-rc2-git5
Submitter	: Mark Langsdorf <mark.langsdorf@amd.com>
Date		: 2008-08-12 21:56 (5 days old)
References	: http://marc.info/?l=linux-kernel&m=121857820413373&w=4

[Bug #11338] ia64 allmodconfig on current mainline

[Rafael J. Wysocki]

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The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11338
Subject		: ia64 allmodconfig on current mainline
Submitter	: Andrew Morton <akpm@linux-foundation.org>
Date		: 2008-08-12 22:06 (5 days old)
References	: http://marc.info/?l=linux-ia64&m=121857881314455&w=4
Handled-By	: Luck, Tony <tony.luck@intel.com>
		  Robin Holt <holt@sgi.com>

[Bug #11339] Only one of my cpus seems to powered down by cpufreq

[Rafael J. Wysocki]

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of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11339
Subject		: Only one of my cpus seems to powered down by cpufreq
Submitter	: Torsten Kaiser <just.for.lkml@googlemail.com>
Date		: 2008-08-13 20:18 (4 days old)
References	: http://marc.info/?l=linux-kernel&m=121865907511340&w=4
Handled-By	: Langsdorf, Mark <mark.langsdorf@amd.com>

[Bug #11340] LTP overnight run resulted in unusable box

[Rafael J. Wysocki]

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of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11340
Subject		: LTP overnight run resulted in unusable box
Submitter	: Alexey Dobriyan <adobriyan@gmail.com>
Date		: 2008-08-13 9:24 (4 days old)
References	: http://marc.info/?l=linux-kernel&m=121861951902949&w=4

[Bug #11341] 2.6.27-rc1 - ext4 e2fsck false prompting for fixing i_size of Inode

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11341
Subject		: 2.6.27-rc1 - ext4 e2fsck false prompting for fixing i_size of Inode
Submitter	: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Date		: 2008-08-13 6:56 (4 days old)
References	: http://marc.info/?l=linux-kernel&m=121861058720051&w=4

[Bug #11343] SATA Cold Boot Problems with 2.6.27-rc[23] on nVidia 680i

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11343
Subject		: SATA Cold Boot Problems with 2.6.27-rc[23] on nVidia 680i
Submitter	: Manny Maxwell <mannymax@mannymax.net>
Date		: 2008-08-14 4:16 (3 days old)
References	: http://marc.info/?l=linux-kernel&m=121868782917600&w=4

[Bug #11344] lockdep link failed

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11344
Subject		: lockdep link failed
Submitter	: Ming Lei <tom.leiming@gmail.com>
Date		: 2008-08-14 9:58 (3 days old)
References	: http://marc.info/?l=linux-kernel&m=121870792715847&w=4

[Bug #11346] kernel BUG at arch/x86/mm/pat.c:233!

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11346
Subject		: kernel BUG at arch/x86/mm/pat.c:233!
Submitter	: Jean Delvare <khali@linux-fr.org>
Date		: 2008-08-15 02:10 (2 days old)
Handled-By	: Andi Kleen <andi@firstfloor.org>
Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17270&action=view

[Bug #11354] AMD Elan regression with 2.6.27-rc3

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11354
Subject		: AMD Elan regression with 2.6.27-rc3
Submitter	: Sean Young <sean@mess.org>
Date		: 2008-08-15 18:37 (2 days old)
References	: http://marc.info/?l=linux-kernel&m=121882578430056&w=4

[Bug #11355] Regression in 2.6.27-rc2 when cross-building the kernel

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11355
Subject		: Regression in 2.6.27-rc2 when cross-building the kernel
Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
Date		: 2008-08-16 2:38 (1 days old)
References	: http://marc.info/?l=linux-kernel&m=121885432118368&w=4

[Bug #11356] Linux 2.6.27-rc3 - build failure: undefined reference to `.lockdep_count_forward_deps'

[Rafael J. Wysocki]

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.26.  Please verify if it still should be listed and let me know
(either way).


Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11356
Subject		: Linux 2.6.27-rc3 - build failure: undefined reference to `.lockdep_count_forward_deps'
Submitter	: Frans Pop <elendil@planet.nl>
Date		: 2008-08-16 19:11 (1 days old)
References	: http://marc.info/?l=linux-kernel&m=121891396320127&w=4

Re: [Bug #11346] kernel BUG at arch/x86/mm/pat.c:233!

[Jean Delvare]

Hi Rafael,

On Sat, 16 Aug 2008 21:02:56 +0200 (CEST), Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11346
> Subject	: kernel BUG at arch/x86/mm/pat.c:233!
> Submitter	: Jean Delvare <khali@linux-fr.org>
> Date		: 2008-08-15 02:10 (2 days old)
> Handled-By	: Andi Kleen <andi@firstfloor.org>
> Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17270&action=view

Andi's patch still needs to be pushed to Linus.

-- 
Jean Delvare

Re: [Bug #11355] Regression in 2.6.27-rc2 when cross-building the kernel

[Larry Finger]

Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11355
> Subject		: Regression in 2.6.27-rc2 when cross-building the kernel
> Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
> Date		: 2008-08-16 2:38 (1 days old)
> References	: http://marc.info/?l=linux-kernel&m=121885432118368&w=4

Yes, bug is still present.

Larry

Re: [Bug #11278] 2.6.27-rc2: Very odd top: '5124095h kthreadd' display

[Grant Coady]

On Sat, 16 Aug 2008 21:02:51 +0200 (CEST), "Rafael J. Wysocki" <rjw@sisk.pl> wrote:

>This message has been generated automatically as a part of a report
>of recent regressions.
>
>The following bug entry is on the current list of known regressions
>from 2.6.26.  Please verify if it still should be listed and let me know
>(either way).
>
>
>Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11278
>Subject		: 2.6.27-rc2: Very odd top: '5124095h kthreadd' display
>Submitter	: Grant Coady <grant_lkml@dodo.com.au>
>Date		: 2008-08-07 7:03 (10 days old)
>References	: http://marc.info/?l=linux-kernel&m=121809267318795&w=4
>Handled-By	: Peter Zijlstra <peterz@infradead.org>
>
The problem is not evident in 2.6.27-rc3

Grant.

Re: [Bug #11260] Regression: USB memory stick triggers several USB resets before settling with bogus capacity

[Hugh Dickins]

On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11260
> Subject		: Regression: USB memory stick triggers several USB resets before settling with bogus capacity
> Submitter	: Alex Villacis Lasso <avillaci@ceibo.fiec.espol.edu.ec>
> Date		: 2008-08-06 13:33 (11 days old)
> Handled-By	: Hugh Dickins <hugh@veritas.com>
> Patch		: http://marc.info/?l=linux-kernel&m=121804333614405&w=2

James has this fix queued in his scsi-rc-fixes for 2.6.27

http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-rc-fixes-2.6.git;a=commit;h=d211f052fa58a053639bc51501cb64421157d362

but hasn't asked Linus to pull for a while: I'm hoping it'll get into -rc4.

Hugh

Re: [Bug #11237] corrupt PMD after resume

[Hugh Dickins]

On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11237
> Subject		: corrupt PMD after resume
> Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
> Date		: 2008-08-02 9:51 (15 days old)
> References	: http://marc.info/?l=linux-kernel&m=121767073424952&w=4
> Handled-By	: Hugh Dickins <hugh@veritas.com>

Definitely should still be listed: Alan has verified it still happens
with -rc3.  I keep on going back to look at the info he's sent, to
try and work out what might be happening and what to try next.

Hugh

Re: [Bug #11335] 2.6.27-rc2-git5 BUG: unable to handle kernel paging request

[Hugh Dickins]

On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11335
> Subject		: 2.6.27-rc2-git5 BUG: unable to handle kernel paging request
> Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
> Date		: 2008-08-12 4:18 (5 days old)
> References	: http://marc.info/?l=linux-kernel&m=121851477201960&w=4
> Handled-By	: Hugh Dickins <hugh@veritas.com>

This should still be listed for now, it's interesting,
but I doubt we'll make any progress unless it can be reproduced.

Hugh

[PATCH] mm: make unmap_vmas() handle non-page-aligned boundary addresses

[Johannes Weiner]

zap_pte_range() overruns the page tables if the distance between the
start and end is not a multiple of the pagesize.  Because then,
`start' will never be equal to `end' and we will keep looping.

To fix this, round the boundary addresses to exclude partial pages from
the range completely, we must not unmap them anyway.

Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
---

Hugh Dickins <hugh@veritas.com> writes:

> On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
>> 
>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11335
>> Subject		: 2.6.27-rc2-git5 BUG: unable to handle kernel paging request
>> Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
>> Date		: 2008-08-12 4:18 (5 days old)
>> References	: http://marc.info/?l=linux-kernel&m=121851477201960&w=4
>> Handled-By	: Hugh Dickins <hugh@veritas.com>
>
> This should still be listed for now, it's interesting,
> but I doubt we'll make any progress unless it can be reproduced.

I think this patch fixes it.  exit_mmap() even calls unmap_vmas() with
an ending address of -1UL which is not page-aligned in my book and on my
architecture :)

It is a similar problem to what we had with gup some weeks ago.

diff --git a/mm/memory.c b/mm/memory.c
index 1002f47..483c5d0 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -896,11 +896,17 @@ unsigned long unmap_vmas(struct mmu_gather **tlbp,
 	long zap_work = ZAP_BLOCK_SIZE;
 	unsigned long tlb_start = 0;	/* For tlb_finish_mmu */
 	int tlb_start_valid = 0;
-	unsigned long start = start_addr;
+	unsigned long start;
 	spinlock_t *i_mmap_lock = details? details->i_mmap_lock: NULL;
 	int fullmm = (*tlbp)->fullmm;
 	struct mm_struct *mm = vma->vm_mm;
 
+	/* Preserve partial pages */
+	start_addr = PAGE_ALIGN(start_addr);
+	end_addr &= PAGE_MASK;
+
+	start = start_addr;
+
 	mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
 	for ( ; vma && vma->vm_start < end_addr; vma = vma->vm_next) {
 		unsigned long end;

Re: [Bug #11334] myri10ge: use ioremap_wc: compilation failure on ARM

[Martin Michlmayr]

* Rafael J. Wysocki <rjw@sisk.pl> [2008-08-16 21:02]:
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).

This is still there.
-- 
Martin Michlmayr
http://www.cyrius.com/

Re: [Bug #11209] 2.6.27-rc1 process time accounting

[Peter Zijlstra]

On Sat, 2008-08-16 at 21:02 +0200, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11209
> Subject		: 2.6.27-rc1 process time accounting
> Submitter	: Lukas Hejtmanek <xhejtman@ics.muni.cz>
> Date		: 2008-07-31 10:43 (17 days old)
> References	: http://marc.info/?l=linux-kernel&m=121750102917490&w=4
> Handled-By	: Peter Zijlstra <a.p.zijlstra@chello.nl>


Should be fixed by: e26b33e9552c29c1d3fe67dc602c6264c29f5dc7

Re: [Bug #11278] 2.6.27-rc2: Very odd top: '5124095h kthreadd' display

[Peter Zijlstra]

On Sat, 2008-08-16 at 21:02 +0200, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11278
> Subject		: 2.6.27-rc2: Very odd top: '5124095h kthreadd' display
> Submitter	: Grant Coady <grant_lkml@dodo.com.au>
> Date		: 2008-08-07 7:03 (10 days old)
> References	: http://marc.info/?l=linux-kernel&m=121809267318795&w=4
> Handled-By	: Peter Zijlstra <peterz@infradead.org>


Should be fixed by: e26b33e9552c29c1d3fe67dc602c6264c29f5dc7

Re: [Bug #11205] x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more

[Mikael Pettersson]

On Sat, 16 Aug 2008 21:02:46 +0200 (CEST), Rafael J. Wysocki wrote:
>The following bug entry is on the current list of known regressions
>from 2.6.26.  Please verify if it still should be listed and let me know
>(either way).
>
>
>Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=3D11205
>Subject		: x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more
>Submitter	: Mikael Pettersson <mikpe@it.uu.se>
>Date		: 2008-07-30 11:02 (18 days old)
>References	: http://marc.info/?l=3Dlinux-kernel&m=3D121741584608240&w=3D4
>Handled-By	: Mikael Pettersson <mikpe@it.uu.se>
>Patch		: http://marc.info/?l=3Dlinux-kernel&m=3D121742199419686&w=3D2

The fix is now in Linus' tree. Commit 1c5b0eb66d74683e2be5da0c53e33c1f4ca982fd.

Re: [Bug #11205] x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Mikael Pettersson wrote:
> On Sat, 16 Aug 2008 21:02:46 +0200 (CEST), Rafael J. Wysocki wrote:
> >The following bug entry is on the current list of known regressions
> >from 2.6.26.  Please verify if it still should be listed and let me know
> >(either way).
> >
> >
> >Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=3D11205
> >Subject		: x86: 2.6.27-rc1 does not build with gcc-3.2.3 any more
> >Submitter	: Mikael Pettersson <mikpe@it.uu.se>
> >Date		: 2008-07-30 11:02 (18 days old)
> >References	: http://marc.info/?l=3Dlinux-kernel&m=3D121741584608240&w=3D4
> >Handled-By	: Mikael Pettersson <mikpe@it.uu.se>
> >Patch		: http://marc.info/?l=3Dlinux-kernel&m=3D121742199419686&w=3D2
> 
> The fix is now in Linus' tree. Commit 1c5b0eb66d74683e2be5da0c53e33c1f4ca982fd.

Thanks, closed.

Rafael

Re: [PATCH] mm: make unmap_vmas() handle non-page-aligned boundary addresses

[Hugh Dickins]

On Sun, 17 Aug 2008, Johannes Weiner wrote:
> zap_pte_range() overruns the page tables if the distance between the
> start and end is not a multiple of the pagesize.  Because then,
> `start' will never be equal to `end' and we will keep looping.
> 
> To fix this, round the boundary addresses to exclude partial pages from
> the range completely, we must not unmap them anyway.

You've a good idea here, but no.

> 
> Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
> ---
> 
> Hugh Dickins <hugh@veritas.com> writes:
> 
> > On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> >> 
> >> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11335
> >> Subject		: 2.6.27-rc2-git5 BUG: unable to handle kernel paging request
> >> Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
> >> Date		: 2008-08-12 4:18 (5 days old)
> >> References	: http://marc.info/?l=linux-kernel&m=121851477201960&w=4
> >> Handled-By	: Hugh Dickins <hugh@veritas.com>
> >
> > This should still be listed for now, it's interesting,
> > but I doubt we'll make any progress unless it can be reproduced.
> 
> I think this patch fixes it.  exit_mmap() even calls unmap_vmas() with
> an ending address of -1UL which is not page-aligned in my book and on my
> architecture :)

You need to take into consideration that gazillions of calls to
exit_mmap(), unmap_vmas() and zap_pte_range() have been succeeding
since we reworked those loops three years ago.  exit_mmap() calls
unmap_vmas() with a start_addr of 0 (so your patch won't help that),
and the (unsigned long) end_addr of -1 is simply an upper bound on
on how far the vma loop goes, it doesn't need the alignment your
patch enforces.

That's a great idea that overrunning a pagetable may account for
Randy's apparent pagetable corruption: I (and please, you too) need
to go back over the info he's given with that hypothesis in mind,
it certainly fits well the fact that 6 out of 7 entries were found
bad at the _start_ of a pagetable before collapsing - though OTOH
I don't think it does fit with the two processes seeing similar
but different corruption, or the general protection faults.
But definitely worth pursuing, it hadn't crossed my mind.

But if a pagetable is being overrun in that way, doesn't that mean
that a vma->vm_start (or vma->vm_end?) has got corrupted, and then
we'll need to work that out.  vm_start and vm_end (unless corrupted)
are always page aligned, and there's lots of code which assumes that:
or have you noticed somewhere that's not so?

> 
> It is a similar problem to what we had with gup some weeks ago.

You're right that those pgd_addr_end() etc. loops have an implicit
and fragile dependence on the page alignment of addr and end.  They
were written that way to maximize efficiency and be homogeneous
across the levels, while handling the wrapped end 0 case.  But both
fast gup and pagewalk have stumbled on those assumptions recently.

Hugh

Re: [Bug #11260] Regression: USB memory stick triggers several USB resets before settling with bogus capacity

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Hugh Dickins wrote:
> On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11260
> > Subject		: Regression: USB memory stick triggers several USB resets before settling with bogus capacity
> > Submitter	: Alex Villacis Lasso <avillaci@ceibo.fiec.espol.edu.ec>
> > Date		: 2008-08-06 13:33 (11 days old)
> > Handled-By	: Hugh Dickins <hugh@veritas.com>
> > Patch		: http://marc.info/?l=linux-kernel&m=121804333614405&w=2
> 
> James has this fix queued in his scsi-rc-fixes for 2.6.27
> 
> http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-rc-fixes-2.6.git;a=commit;h=d211f052fa58a053639bc51501cb64421157d362
> 
> but hasn't asked Linus to pull for a while: I'm hoping it'll get into -rc4.

Thanks for the update.

Rafael

Re: [Bug #11237] corrupt PMD after resume

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Hugh Dickins wrote:
> On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11237
> > Subject		: corrupt PMD after resume
> > Submitter	: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
> > Date		: 2008-08-02 9:51 (15 days old)
> > References	: http://marc.info/?l=linux-kernel&m=121767073424952&w=4
> > Handled-By	: Hugh Dickins <hugh@veritas.com>
> 
> Definitely should still be listed: Alan has verified it still happens
> with -rc3.  I keep on going back to look at the info he's sent, to
> try and work out what might be happening and what to try next.

Thanks for the update.

Rafael

Re: [Bug #11209] 2.6.27-rc1 process time accounting

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Peter Zijlstra wrote:
> On Sat, 2008-08-16 at 21:02 +0200, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11209
> > Subject		: 2.6.27-rc1 process time accounting
> > Submitter	: Lukas Hejtmanek <xhejtman@ics.muni.cz>
> > Date		: 2008-07-31 10:43 (17 days old)
> > References	: http://marc.info/?l=linux-kernel&m=121750102917490&w=4
> > Handled-By	: Peter Zijlstra <a.p.zijlstra@chello.nl>
> 
> 
> Should be fixed by: e26b33e9552c29c1d3fe67dc602c6264c29f5dc7

Thanks, closed.

Rafael

Re: [Bug #11333] Rewrite SSB DMA API breaks compilation on ARM

[Martin Michlmayr]

* Rafael J. Wysocki <rjw@sisk.pl> [2008-08-16 21:02]:
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).

This just got fixed by "[ARM] dma-mapping: provide sync_range APIs":
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9dd428680573d7867ee5e40fa3f059a98301d416

-- 
Martin Michlmayr
http://www.cyrius.com/

Re: [Bug #11278] 2.6.27-rc2: Very odd top: '5124095h kthreadd' display

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Peter Zijlstra wrote:
> On Sat, 2008-08-16 at 21:02 +0200, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11278
> > Subject		: 2.6.27-rc2: Very odd top: '5124095h kthreadd' display
> > Submitter	: Grant Coady <grant_lkml@dodo.com.au>
> > Date		: 2008-08-07 7:03 (10 days old)
> > References	: http://marc.info/?l=linux-kernel&m=121809267318795&w=4
> > Handled-By	: Peter Zijlstra <peterz@infradead.org>
> 
> 
> Should be fixed by: e26b33e9552c29c1d3fe67dc602c6264c29f5dc7

Thanks, closed.

Rafael

Re: [PATCH] mm: make unmap_vmas() handle non-page-aligned boundary addresses

[Johannes Weiner]

Hi Hugh,

Hugh Dickins <hugh@veritas.com> writes:

> On Sun, 17 Aug 2008, Johannes Weiner wrote:
>> zap_pte_range() overruns the page tables if the distance between the
>> start and end is not a multiple of the pagesize.  Because then,
>> `start' will never be equal to `end' and we will keep looping.
>> 
>> To fix this, round the boundary addresses to exclude partial pages from
>> the range completely, we must not unmap them anyway.
>
> You've a good idea here, but no.
>
>> 
>> Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
>> ---
>> 
>> Hugh Dickins <hugh@veritas.com> writes:
>> 
>> > On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
>> >> 
>> >> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11335
>> >> Subject		: 2.6.27-rc2-git5 BUG: unable to handle kernel paging request
>> >> Submitter	: Randy Dunlap <randy.dunlap@oracle.com>
>> >> Date		: 2008-08-12 4:18 (5 days old)
>> >> References	: http://marc.info/?l=linux-kernel&m=121851477201960&w=4
>> >> Handled-By	: Hugh Dickins <hugh@veritas.com>
>> >
>> > This should still be listed for now, it's interesting,
>> > but I doubt we'll make any progress unless it can be reproduced.
>> 
>> I think this patch fixes it.  exit_mmap() even calls unmap_vmas() with
>> an ending address of -1UL which is not page-aligned in my book and on my
>> architecture :)
>
> You need to take into consideration that gazillions of calls to
> exit_mmap(), unmap_vmas() and zap_pte_range() have been succeeding
> since we reworked those loops three years ago.  exit_mmap() calls
> unmap_vmas() with a start_addr of 0 (so your patch won't help that),
> and the (unsigned long) end_addr of -1 is simply an upper bound on
> on how far the vma loop goes, it doesn't need the alignment your
> patch enforces.

Now that you say it, yes, I don't see any way how the upper bound of
-1UL could break it as vm_end is most probably lower than that :)

However:

		start = max(vma->vm_start, start_addr);
		end = min(vma->vm_end, end_addr);

The overrun *is* possible if the given ending address is lower than the
vm_end.

The same goes for a broken start if it is higher than vm_start.

> That's a great idea that overrunning a pagetable may account for
> Randy's apparent pagetable corruption: I (and please, you too) need
> to go back over the info he's given with that hypothesis in mind,
> it certainly fits well the fact that 6 out of 7 entries were found
> bad at the _start_ of a pagetable before collapsing - though OTOH
> I don't think it does fit with the two processes seeing similar
> but different corruption, or the general protection faults.
> But definitely worth pursuing, it hadn't crossed my mind.

Frankly, I didn't look too much at what Randy reported.  I ran off a bit
quick when I saw that the fault came on an empty PMD within this code as
this overrun issue was still in the back of my head and I knew there
were similar loops involved.

I will try and help debugging this further.

> But if a pagetable is being overrun in that way, doesn't that mean
> that a vma->vm_start (or vma->vm_end?) has got corrupted, and then
> we'll need to work that out.  vm_start and vm_end (unless corrupted)
> are always page aligned, and there's lots of code which assumes that:
> or have you noticed somewhere that's not so?

No, I have not.

But an overrun condition also does not require broken VMA bounds.
Although that could be a possibility, too, of course.

>> It is a similar problem to what we had with gup some weeks ago.
>
> You're right that those pgd_addr_end() etc. loops have an implicit
> and fragile dependence on the page alignment of addr and end.  They
> were written that way to maximize efficiency and be homogeneous
> across the levels, while handling the wrapped end 0 case.  But both
> fast gup and pagewalk have stumbled on those assumptions recently.

Yeah, especially since they could cause silent page table corruption :(

In this respect, I still think that my patch has a point.  Because yes,
the looping depends on page aligned boundaries, but we don't check for
this required dependency and values leading to overruns are able to pass
through, as explained above.

> Hugh

	Hannes

Re: [Bug #11334] myri10ge: use ioremap_wc: compilation failure on ARM

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Martin Michlmayr wrote:
> * Rafael J. Wysocki <rjw@sisk.pl> [2008-08-16 21:02]:
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> 
> This is still there.

Thanks for the update.

Rafael

Re: [Bug #11346] kernel BUG at arch/x86/mm/pat.c:233!

[Rafael J. Wysocki]

On Saturday, 16 of August 2008, Jean Delvare wrote:
> Hi Rafael,
> 
> On Sat, 16 Aug 2008 21:02:56 +0200 (CEST), Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11346
> > Subject	: kernel BUG at arch/x86/mm/pat.c:233!
> > Submitter	: Jean Delvare <khali@linux-fr.org>
> > Date		: 2008-08-15 02:10 (2 days old)
> > Handled-By	: Andi Kleen <andi@firstfloor.org>
> > Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17270&action=view
> 
> Andi's patch still needs to be pushed to Linus.

Thanks for the update.

Rafael

Re: [Bug #11355] Regression in 2.6.27-rc2 when cross-building the kernel

[Rafael J. Wysocki]

On Saturday, 16 of August 2008, Larry Finger wrote:
> Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11355
> > Subject		: Regression in 2.6.27-rc2 when cross-building the kernel
> > Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
> > Date		: 2008-08-16 2:38 (1 days old)
> > References	: http://marc.info/?l=linux-kernel&m=121885432118368&w=4
> 
> Yes, bug is still present.

Thanks for the update.

Rafael

Re: [Bug #11333] Rewrite SSB DMA API breaks compilation on ARM

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Martin Michlmayr wrote:
> * Rafael J. Wysocki <rjw@sisk.pl> [2008-08-16 21:02]:
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> 
> This just got fixed by "[ARM] dma-mapping: provide sync_range APIs":
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9dd428680573d7867ee5e40fa3f059a98301d416

Thanks, closed.

Rafael

Re: [Bug #11346] kernel BUG at arch/x86/mm/pat.c:233!

[Ingo Molnar]

* Rafael J. Wysocki <rjw@sisk.pl> wrote:

> On Saturday, 16 of August 2008, Jean Delvare wrote:
> > Hi Rafael,
> > 
> > On Sat, 16 Aug 2008 21:02:56 +0200 (CEST), Rafael J. Wysocki wrote:
> > > This message has been generated automatically as a part of a report
> > > of recent regressions.
> > > 
> > > The following bug entry is on the current list of known regressions
> > > from 2.6.26.  Please verify if it still should be listed and let me know
> > > (either way).
> > > 
> > > 
> > > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11346
> > > Subject	: kernel BUG at arch/x86/mm/pat.c:233!
> > > Submitter	: Jean Delvare <khali@linux-fr.org>
> > > Date		: 2008-08-15 02:10 (2 days old)
> > > Handled-By	: Andi Kleen <andi@firstfloor.org>
> > > Patch		: http://bugzilla.kernel.org/attachment.cgi?id=17270&action=view
> > 
> > Andi's patch still needs to be pushed to Linus.
> 
> Thanks for the update.

now upstream as commit e213e8778.

	Ingo

Re: [PATCH] mm: make unmap_vmas() handle non-page-aligned boundary addresses

[Hugh Dickins]

On Sun, 17 Aug 2008, Johannes Weiner wrote:
> Hugh Dickins <hugh@veritas.com> writes:
> 
> I will try and help debugging this further.

Thanks!

> > You're right that those pgd_addr_end() etc. loops have an implicit
> > and fragile dependence on the page alignment of addr and end.  They
> > were written that way to maximize efficiency and be homogeneous
> > across the levels, while handling the wrapped end 0 case.  But both
> > fast gup and pagewalk have stumbled on those assumptions recently.
> 
> Yeah, especially since they could cause silent page table corruption :(

Silent?  I guess those'll be the cases we've not heard about ;)

> 
> In this respect, I still think that my patch has a point.  Because yes,
> the looping depends on page aligned boundaries, but we don't check for
> this required dependency and values leading to overruns are able to pass
> through, as explained above.

I don't think the patch you sent had a lot of point: if there is a 
problem, it extends way beyond just the entry to unmap_vmas(); and
really it's not the well-established loops we have to worry about,
it's where people add new ones without thinking about alignment.

If we put alignment BUG_ONs at the start of every such loop,
yes, that would help the new ones to follow the same pattern.
Or if we put alignment VM_BUG_ONs inside p?d_addr_next(), that
might help too - I say VM_BUG_ONs because we don't really want
to slow down the usual config, though that would then miss any
cases of vma corruption in the wild.

But even if we did so, it looks like we go for a long while only
testing the page-aligned cases anyway (which, barring corruption,
is always the case coming from vm_start and vm_end: the exceptions
are things like fault addresses or atypical I/O sizes), which
would not BUG anyway.  As soon as someone does try the unaligned,
we veer off to an unbounded loop and hit something nasty quite
noisily, don't we?

I do think there's a message about review and testing here, but
not a great case for BUGs.  Well, you didn't BUG, you enforced
alignment; but if the input is wrong, you cannot tell whether
to round up or round down in there, so better to BUG or WARN.

Hugh

Re: 2.6.27-rc3-git3: Reported regressions from 2.6.26

[Theodore Tso]

On Sat, Aug 16, 2008 at 09:00:39PM +0200, Rafael J. Wysocki wrote:
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11341
> Subject		: 2.6.27-rc1 - ext4 e2fsck false prompting for fixing i_size of Inode
> Submitter	: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
> Date		: 2008-08-13 6:56 (4 days old)
> References	: http://marc.info/?l=linux-kernel&m=121861058720051&w=4

This wasn't a regression because it wasn't a kernel bug (and so by
definition it existed on prior kernel versions :-).  I've just checked
in a fix into the e2fsprogs repository, and I've included the
e2fsprogs patch in the bugzilla record for the user's convenience.

	  	       		       	       - Ted

Re: [PATCH] mm: make unmap_vmas() handle non-page-aligned boundary addresses

[Johannes Weiner]

Hi,

Hugh Dickins <hugh@veritas.com> writes:

> On Sun, 17 Aug 2008, Johannes Weiner wrote:
>> Hugh Dickins <hugh@veritas.com> writes:
>> 
>> I will try and help debugging this further.
>
> Thanks!
>
>> > You're right that those pgd_addr_end() etc. loops have an implicit
>> > and fragile dependence on the page alignment of addr and end.  They
>> > were written that way to maximize efficiency and be homogeneous
>> > across the levels, while handling the wrapped end 0 case.  But both
>> > fast gup and pagewalk have stumbled on those assumptions recently.
>> 
>> Yeah, especially since they could cause silent page table corruption :(
>
> Silent?  I guess those'll be the cases we've not heard about ;)

Or we couldn't associate the problem with the source :)

>> In this respect, I still think that my patch has a point.  Because yes,
>> the looping depends on page aligned boundaries, but we don't check for
>> this required dependency and values leading to overruns are able to pass
>> through, as explained above.
>
> I don't think the patch you sent had a lot of point: if there is a 
> problem, it extends way beyond just the entry to unmap_vmas(); and
> really it's not the well-established loops we have to worry about,
> it's where people add new ones without thinking about alignment.

The loops might have been there for long but the usage and input is
prone to change.

For example remap_pfn_range is used by drivers and it has the same
alignment requirements.  Perhaps an explicit comment in the kerneldoc?

Iff there is even a problem with all these things, still looking through
callsites, rereading your mails and thinking about it..  Hey, this thing
is big and I try hard to get a clue ;)

> If we put alignment BUG_ONs at the start of every such loop,
> yes, that would help the new ones to follow the same pattern.
> Or if we put alignment VM_BUG_ONs inside p?d_addr_next(), that
> might help too - I say VM_BUG_ONs because we don't really want
> to slow down the usual config, though that would then miss any
> cases of vma corruption in the wild.
>
> But even if we did so, it looks like we go for a long while only
> testing the page-aligned cases anyway (which, barring corruption,
> is always the case coming from vm_start and vm_end: the exceptions
> are things like fault addresses or atypical I/O sizes), which
> would not BUG anyway.  As soon as someone does try the unaligned,
> we veer off to an unbounded loop and hit something nasty quite
> noisily, don't we?

Yeah, I think so.

> I do think there's a message about review and testing here, but
> not a great case for BUGs.  Well, you didn't BUG, you enforced
> alignment; but if the input is wrong, you cannot tell whether
> to round up or round down in there, so better to BUG or WARN.

Agreed.  Well, in the unmap_vmas() case you can not unmap partial pages,
so you would probably be able to guess correct.  But I agree it should
be up to the callsite.

	Hannes

Re: [Bug #11260] Regression: USB memory stick triggers several USB resets before settling with bogus capacity

[James Bottomley]

On Sun, 2008-08-17 at 00:33 +0100, Hugh Dickins wrote:
> On Sat, 16 Aug 2008, Rafael J. Wysocki wrote:
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11260
> > Subject		: Regression: USB memory stick triggers several USB resets before settling with bogus capacity
> > Submitter	: Alex Villacis Lasso <avillaci@ceibo.fiec.espol.edu.ec>
> > Date		: 2008-08-06 13:33 (11 days old)
> > Handled-By	: Hugh Dickins <hugh@veritas.com>
> > Patch		: http://marc.info/?l=linux-kernel&m=121804333614405&w=2
> 
> James has this fix queued in his scsi-rc-fixes for 2.6.27
> 
> http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-rc-fixes-2.6.git;a=commit;h=d211f052fa58a053639bc51501cb64421157d362
> 
> but hasn't asked Linus to pull for a while: I'm hoping it'll get into -rc4.

Yes ... sure.  linux-next has slowed my push to rcs because it's in
there as soon as it's in my git tree.  However, give it a couple of days
to test out the rest of the fixes in the tree and I'll send a push
request.

James

Re: 2.6.27-rc3-git3: Reported regressions from 2.6.26

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Theodore Tso wrote:
> On Sat, Aug 16, 2008 at 09:00:39PM +0200, Rafael J. Wysocki wrote:
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11341
> > Subject		: 2.6.27-rc1 - ext4 e2fsck false prompting for fixing i_size of Inode
> > Submitter	: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
> > Date		: 2008-08-13 6:56 (4 days old)
> > References	: http://marc.info/?l=linux-kernel&m=121861058720051&w=4
> 
> This wasn't a regression because it wasn't a kernel bug (and so by
> definition it existed on prior kernel versions :-).  I've just checked
> in a fix into the e2fsprogs repository, and I've included the
> e2fsprogs patch in the bugzilla record for the user's convenience.

Thanks a lot for handling this.

Rafael

Re: [Bug #11254] KVM: fix userspace ABI breakage

[Adrian Bunk]

On Sat, Aug 16, 2008 at 09:02:49PM +0200, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).

yes

> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11254
> Subject		: KVM: fix userspace ABI breakage
> Submitter	: Adrian Bunk <bunk@kernel.org>
> Date		: 21 Jul 2008 17:58:26 (0 days old)
> References	: http://lkml.org/lkml/2008/7/21/197
> Handled-By	: Adrian Bunk <bunk@kernel.org>
> Patch		: http://lkml.org/lkml/2008/7/21/197

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Rafał Miłecki]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=UTF-8, Size: 756 bytes --]

2008/8/16, Rafael J. Wysocki <rjw@sisk.pl>:> This message has been generated automatically as a part of a report> of recent regressions.>> The following bug entry is on the current list of known regressions> from 2.6.26.  Please verify if it still should be listed and let me know> (either way).>>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11313> Subject		: Plugging HDMI causes "unable to handle kernel paging request"> Submitter	: Rafał Miłecki <zajec5@gmail.com>> Date		: 2008-08-12 14:30 (5 days old)
Bug still exists in current git (tested 15 minutes ago).
-- RafaÅ‚ MiÅ‚eckiÿôèº{.nÇ+‰·Ÿ®‰­†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a­¢f£¢·hšïêÿ‘êçz_è®\x03(­éšŽŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨è­Ú&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Rafael J. Wysocki]

On Sunday, 17 of August 2008, Rafał Miłecki wrote:
> 2008/8/16, Rafael J. Wysocki <rjw@sisk.pl>:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> >
> >
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11313
> > Subject		: Plugging HDMI causes "unable to handle kernel paging request"
> > Submitter	: Rafał Miłecki <zajec5@gmail.com>
> > Date		: 2008-08-12 14:30 (5 days old)
> 
> Bug still exists in current git (tested 15 minutes ago).
> 

Thanks for the update.

Rafael

Re: [Bug #11228] p54usb broken by commit b19fa1f

[Larry Finger]

Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11228
> Subject		: p54usb broken by commit b19fa1f
> Submitter	: Larry Finger <Larry.Finger@lwfinger.net>
> Date		: 2008-08-02 3:06 (15 days old)
> References	: http://marc.info/?l=linux-kernel&m=121764647801783&w=4
> Handled-By	: Larry Finger <Larry.Finger@lwfinger.net>
> Patch		: http://marc.info/?l=linux-kernel&m=121779445431434&w=4

The fix was pushed from wireless (Linville) to networks (davem) on 8/17.

Re: [Bug #11330] int3: 0000 in tsc_read_refs when using powernow_k7

[Alok Kataria]

On Sat, 2008-08-16 at 12:02 -0700, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).

There is this fix 

commit d554d9a4295dd0595d12eeccbc55d1f495b15176
Author: Marcin Slusarz <marcin.slusarz@gmail.com>
Date:   Mon Aug 11 00:07:44 2008 +0200

    x86, tsc: fix section mismatch warning

which is in x86/tip-master which fixes this issue. 
I don't see the fix in the mainline tree yet. 

Maybe Ingo, has it queued, for upstream ?
Ingo, other than a section mismatch warning it also fixes a real bug.

Thanks,
Alok

> 

> 
> Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=11330
> Subject         : int3: 0000 in tsc_read_refs when using powernow_k7
> Submitter       : Mikko Vinni <mmvinni@yahoo.com>
> Date            : 2008-08-14 04:21 (3 days old)
> Patch           : http://bugzilla.kernel.org/show_bug.cgi?id=11330#c2
> 
> 

Re: [Bug #11330] int3: 0000 in tsc_read_refs when using powernow_k7

[Ingo Molnar]

* Alok Kataria <akataria@vmware.com> wrote:

> On Sat, 2008-08-16 at 12:02 -0700, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> 
> There is this fix 
> 
> commit d554d9a4295dd0595d12eeccbc55d1f495b15176
> Author: Marcin Slusarz <marcin.slusarz@gmail.com>
> Date:   Mon Aug 11 00:07:44 2008 +0200
> 
>     x86, tsc: fix section mismatch warning
> 
> which is in x86/tip-master which fixes this issue. 
> I don't see the fix in the mainline tree yet. 
> 
> Maybe Ingo, has it queued, for upstream ?
> Ingo, other than a section mismatch warning it also fixes a real bug.

yeah, hpa queued it up into x86/urgent as well earlier today, it will go 
out with the next pull request.

	Ingo

Re: [Bug #11191] 2.6.26-git8: spinlock lockup in c1e_idle()

[Mikhail Kshevetskiy]

As of 2.6.26-rc3-git3 bug still exist.
It affect both i386 and x86_64 architectures.

Mikhail

On Sat, 16 Aug 2008 21:02:46 +0200 (CEST)
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.26.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11191
> Subject		: 2.6.26-git8: spinlock lockup in c1e_idle()
> Submitter	: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
> Date		: 2008-07-24 03:22 (24 days old)
> References	: http://lkml.org/lkml/2008/7/23/317
> Handled-By	: Thomas Gleixner <tglx@linutronix.de>
> 
> 

Re: [Bug #11191] 2.6.26-git8: spinlock lockup in c1e_idle()

[Rafael J. Wysocki]

On Monday, 18 of August 2008, Mikhail Kshevetskiy wrote:
> As of 2.6.26-rc3-git3 bug still exist.
> It affect both i386 and x86_64 architectures.
> 
> Mikhail

Thanks for the update,
Rafael

> On Sat, 16 Aug 2008 21:02:46 +0200 (CEST)
> "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> 
> > This message has been generated automatically as a part of a report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.26.  Please verify if it still should be listed and let me know
> > (either way).
> > 
> > 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11191
> > Subject		: 2.6.26-git8: spinlock lockup in c1e_idle()
> > Submitter	: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
> > Date		: 2008-07-24 03:22 (24 days old)
> > References	: http://lkml.org/lkml/2008/7/23/317
> > Handled-By	: Thomas Gleixner <tglx@linutronix.de>

Re: [Bug #11330] int3: 0000 in tsc_read_refs when using powernow_k7

[Ingo Molnar]

* Ingo Molnar <mingo@elte.hu> wrote:

> > There is this fix 
> > 
> > commit d554d9a4295dd0595d12eeccbc55d1f495b15176
> > Author: Marcin Slusarz <marcin.slusarz@gmail.com>
> > Date:   Mon Aug 11 00:07:44 2008 +0200
> > 
> >     x86, tsc: fix section mismatch warning
> > 
> > which is in x86/tip-master which fixes this issue. 
> > I don't see the fix in the mainline tree yet. 
> > 
> > Maybe Ingo, has it queued, for upstream ?
> > Ingo, other than a section mismatch warning it also fixes a real bug.
> 
> yeah, hpa queued it up into x86/urgent as well earlier today, it will go 
> out with the next pull request.

FYI, commit d554d9a4295d is upstream now, and will be part of -rc4.

	Ingo

Re: [Bug #11330] int3: 0000 in tsc_read_refs when using powernow_k7

[Rafael J. Wysocki]

On Tuesday, 19 of August 2008, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@elte.hu> wrote:
> 
> > > There is this fix 
> > > 
> > > commit d554d9a4295dd0595d12eeccbc55d1f495b15176
> > > Author: Marcin Slusarz <marcin.slusarz@gmail.com>
> > > Date:   Mon Aug 11 00:07:44 2008 +0200
> > > 
> > >     x86, tsc: fix section mismatch warning
> > > 
> > > which is in x86/tip-master which fixes this issue. 
> > > I don't see the fix in the mainline tree yet. 
> > > 
> > > Maybe Ingo, has it queued, for upstream ?
> > > Ingo, other than a section mismatch warning it also fixes a real bug.
> > 
> > yeah, hpa queued it up into x86/urgent as well earlier today, it will go 
> > out with the next pull request.
> 
> FYI, commit d554d9a4295d is upstream now, and will be part of -rc4.

Thanks, I closed the bug.

Rafael

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Jeremy Fitzhardinge]

Rafał Miłecki wrote:
> 2008/8/16, Rafael J. Wysocki <rjw@sisk.pl>:
>   
>> This message has been generated automatically as a part of a report
>> of recent regressions.
>>
>> The following bug entry is on the current list of known regressions
>> from 2.6.26.  Please verify if it still should be listed and let me know
>> (either way).
>>
>>
>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11313
>> Subject		: Plugging HDMI causes "unable to handle kernel paging request"
>> Submitter	: Rafał Miłecki <zajec5@gmail.com>
>> Date		: 2008-08-12 14:30 (5 days old)
>>     
>
> Bug still exists in current git (tested 15 minutes ago).
>   

What's your .config on this kernel, BTW?

    J

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Jeremy Fitzhardinge]

Rafał Miłecki wrote:
> Bug still exists in current git (tested 15 minutes ago).
>   

Could you apply this patch and post the output of dmesg from booting (no
need to crash it again).

Thanks,
    J

diff -r 3f465c361b3c arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c	Wed Aug 13 20:50:10 2008 -0700
+++ b/arch/x86/mm/init_64.c	Tue Aug 19 16:50:10 2008 -0700
@@ -331,6 +331,8 @@
 		}
 
 		if (pmd_val(*pmd)) {
+			printk("addr %lx reusing pmd %lx %016lx\n",
+			       address, __pa(pmd), pmd_val(*pmd));
 			if (!pmd_large(*pmd))
 				last_map_addr = phys_pte_update(pmd, address,
 								 end);
@@ -392,6 +394,8 @@
 		}
 
 		if (pud_val(*pud)) {
+			printk("addr %lx reusing pud %lx %016lx\n",
+			       addr, __pa(pud), pud_val(*pud));
 			if (!pud_large(*pud))
 				last_map_addr = phys_pmd_update(pud, addr, end,
 							 page_size_mask);
@@ -500,6 +504,8 @@
 			next = end;
 
 		if (pgd_val(*pgd)) {
+			printk("addr %lx reusing pgd %lx %016lx\n",
+			       __pa(start), __pa(pgd), pgd_val(*pgd));
 			last_map_addr = phys_pud_update(pgd, __pa(start),
 						 __pa(end), page_size_mask);
 			continue;

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Rafał Miłecki]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
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2008/8/19, Jeremy Fitzhardinge <jeremy@goop.org>:> What's your .config on this kernel, BTW?
I mostly used openSUSE's kernel configuration. I just disabled paravirt.http://bugzilla.kernel.org/attachment.cgi?id=17329

2008/8/20, Jeremy Fitzhardinge <jeremy@goop.org>:> Rafał Miłecki wrote:>> Bug still exists in current git (tested 15 minutes ago).>>>> Could you apply this patch and post the output of dmesg from booting (no> need to crash it again).
Sure, as everything to help debugging this :)http://bugzilla.kernel.org/attachment.cgi?id=17330
-- RafaÅ‚ MiÅ‚eckiÿôèº{.nÇ+‰·Ÿ®‰­†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a­¢f£¢·hšïêÿ‘êçz_è®\x03(­éšŽŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨è­Ú&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Jeremy Fitzhardinge]

Rafał Miłecki wrote:
> Sure, as everything to help debugging this :)
> http://bugzilla.kernel.org/attachment.cgi?id=17330
>   

Thanks, but could you post the *full* dmesg output, including the added
lines?  I want to see the other things it prints around there.

That said, I don't see anything unexpected in here.  It would be
interested to compare to the E820 map.

Also, what kind of machine is this?  Oh, Vaio. Hm.  Have you checked to
see whether there's an updated BIOS?  How much memory does it have
installed?

    J

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Rafał Miłecki]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=UTF-8, Size: 957 bytes --]

2008/8/20 Jeremy Fitzhardinge <jeremy@goop.org>:> Rafał Miłecki wrote:>> Sure, as everything to help debugging this :)>> http://bugzilla.kernel.org/attachment.cgi?id=17330>>>> Thanks, but could you post the *full* dmesg output, including the added> lines?  I want to see the other things it prints around there.I added full dmesg 5 minutes after adding grepped:http://bugzilla.kernel.org/attachment.cgi?id=17331
> That said, I don't see anything unexpected in here.  It would be> interested to compare to the E820 map.OK, I'll compare that tomorrow.
> Also, what kind of machine is this?  Oh, Vaio. Hm.  Have you checked to> see whether there's an updated BIOS?  How much memory does it have> installed?It's Sony Vaio FW11 with 4GB of RAM. Will chec for BIOS update tomorrow.

-- RafaÅ‚ MiÅ‚eckiÿôèº{.nÇ+‰·Ÿ®‰­†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a­¢f£¢·hšïêÿ‘êçz_è®\x03(­éšŽŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨è­Ú&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Jeremy Fitzhardinge]

Rafał Miłecki wrote:
> 2008/8/20 Jeremy Fitzhardinge <jeremy@goop.org>:
>   
>> Rafał Miłecki wrote:
>>     
>>> Sure, as everything to help debugging this :)
>>> http://bugzilla.kernel.org/attachment.cgi?id=17330
>>>
>>>       
>> Thanks, but could you post the *full* dmesg output, including the added
>> lines?  I want to see the other things it prints around there.
>>     
> I added full dmesg 5 minutes after adding grepped:
> http://bugzilla.kernel.org/attachment.cgi?id=17331
>   

Yep, saw it thanks.

    J

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Jeremy Fitzhardinge]

Rafał Miłecki wrote:
> I added full dmesg 5 minutes after adding grepped:
> http://bugzilla.kernel.org/attachment.cgi?id=17331
>   

OK, I think I see the problem (pasted from bugzilla comment):

>>>>
Some notes as I pick through all the evidence so far:

- the crash is specifically because there are reserved bits set in the pmd
- the pmd is b02a00043a6001a3 in both cases
- the vaddr is ffff88013a600000 in the first crash, and
               ffff81013a6d1c00 in the second
  corresponding to the same large-page pmd mapping of phys page 0x13a600000
- this maps to e820 entry
 BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
- the corresponding boot-time mapping is

init_memory_mapping
 0100000000 - 0140000000 page 2M
kernel direct mapping tables up to 140000000 @ b000-11000
                                               ^^^^^^^^^^
addr 100000000 reusing pgd 201880 0000000000202063
last_map_addr: 140000000 end: 140000000

!!! and the memory allocated for this pagetable is:
  #5 [0000008000 - 000000b000]          PGTABLE ==> [0000008000 - 000000b000]
  #6 [000000b000 - 000000c000]          PGTABLE ==> [000000b000 - 000000c000]
                                                     ^^^^^^^^^^^^^^^^^^^^^^^

IOW, it's mapping using b000-11000, but it has only reserved b000 - c000

Also, this is right in the middle of the ISA area, which seems risky.
<<<<

Bug #11237 shows the same symptom, so I'm pretty confident they're dups now.

    J

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Rafael J. Wysocki]

On Thursday, 21 of August 2008, Jeremy Fitzhardinge wrote:
> Rafał Miłecki wrote:
> > I added full dmesg 5 minutes after adding grepped:
> > http://bugzilla.kernel.org/attachment.cgi?id=17331
> >   
> 
> OK, I think I see the problem (pasted from bugzilla comment):
> 
> >>>>
> Some notes as I pick through all the evidence so far:
> 
> - the crash is specifically because there are reserved bits set in the pmd
> - the pmd is b02a00043a6001a3 in both cases
> - the vaddr is ffff88013a600000 in the first crash, and
>                ffff81013a6d1c00 in the second
>   corresponding to the same large-page pmd mapping of phys page 0x13a600000
> - this maps to e820 entry
>  BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
> - the corresponding boot-time mapping is
> 
> init_memory_mapping
>  0100000000 - 0140000000 page 2M
> kernel direct mapping tables up to 140000000 @ b000-11000
>                                                ^^^^^^^^^^
> addr 100000000 reusing pgd 201880 0000000000202063
> last_map_addr: 140000000 end: 140000000
> 
> !!! and the memory allocated for this pagetable is:
>   #5 [0000008000 - 000000b000]          PGTABLE ==> [0000008000 - 000000b000]
>   #6 [000000b000 - 000000c000]          PGTABLE ==> [000000b000 - 000000c000]
>                                                      ^^^^^^^^^^^^^^^^^^^^^^^
> 
> IOW, it's mapping using b000-11000, but it has only reserved b000 - c000
> 
> Also, this is right in the middle of the ISA area, which seems risky.
> <<<<
> 
> Bug #11237 shows the same symptom, so I'm pretty confident they're dups now.

I have marked #11313 as a duplicate of #11237.  Please use the latter one from
now on.

Thanks,
Rafael

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Hugh Dickins]

On Thu, 21 Aug 2008, Jeremy Fitzhardinge wrote:
> 
> >>>>
> Some notes as I pick through all the evidence so far:
> 
> - the crash is specifically because there are reserved bits set in the pmd
> - the pmd is b02a00043a6001a3 in both cases

Yes, it's corrupt, it should be
               800000013a6001a3

> - the vaddr is ffff88013a600000 in the first crash, and
>                ffff81013a6d1c00 in the second
>   corresponding to the same large-page pmd mapping of phys page 0x13a600000
> - this maps to e820 entry
>  BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
> - the corresponding boot-time mapping is
> 
> init_memory_mapping
>  0100000000 - 0140000000 page 2M
> kernel direct mapping tables up to 140000000 @ b000-11000
>                                                ^^^^^^^^^^
> addr 100000000 reusing pgd 201880 0000000000202063
> last_map_addr: 140000000 end: 140000000
> 
> !!! and the memory allocated for this pagetable is:
>   #5 [0000008000 - 000000b000]          PGTABLE ==> [0000008000 - 000000b000]
>   #6 [000000b000 - 000000c000]          PGTABLE ==> [000000b000 - 000000c000]
>                                                      ^^^^^^^^^^^^^^^^^^^^^^^
> 
> IOW, it's mapping using b000-11000, but it has only reserved b000 - c000
> 
> Also, this is right in the middle of the ISA area, which seems risky.
> <<<<
> 
> Bug #11237 shows the same symptom, so I'm pretty confident they're dups now.

[ Sorry, I'm replying to #11313 even though we think it's dup of #11237. ]

Haven't you got that backwards?

My reading is that find_early_table_space set aside b000-11000 for the
worst case possible, but actually only b000-c000 was needed (because
most of the tables were already there): no problem.

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Jeremy Fitzhardinge]

Hugh Dickins wrote:
> On Thu, 21 Aug 2008, Jeremy Fitzhardinge wrote:
>   
>> Some notes as I pick through all the evidence so far:
>>
>> - the crash is specifically because there are reserved bits set in the pmd
>> - the pmd is b02a00043a6001a3 in both cases
>>     
>
> Yes, it's corrupt, it should be
>                800000013a6001a3
>
>   
>> - the vaddr is ffff88013a600000 in the first crash, and
>>                ffff81013a6d1c00 in the second
>>   corresponding to the same large-page pmd mapping of phys page 0x13a600000
>> - this maps to e820 entry
>>  BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
>> - the corresponding boot-time mapping is
>>
>> init_memory_mapping
>>  0100000000 - 0140000000 page 2M
>> kernel direct mapping tables up to 140000000 @ b000-11000
>>                                                ^^^^^^^^^^
>> addr 100000000 reusing pgd 201880 0000000000202063
>> last_map_addr: 140000000 end: 140000000
>>
>> !!! and the memory allocated for this pagetable is:
>>   #5 [0000008000 - 000000b000]          PGTABLE ==> [0000008000 - 000000b000]
>>   #6 [000000b000 - 000000c000]          PGTABLE ==> [000000b000 - 000000c000]
>>                                                      ^^^^^^^^^^^^^^^^^^^^^^^
>>
>> IOW, it's mapping using b000-11000, but it has only reserved b000 - c000
>>
>> Also, this is right in the middle of the ISA area, which seems risky.
>> <<<<
>>
>> Bug #11237 shows the same symptom, so I'm pretty confident they're dups now.
>>     
>
> [ Sorry, I'm replying to #11313 even though we think it's dup of #11237. ]
>
> Haven't you got that backwards?
>
> My reading is that find_early_table_space set aside b000-11000 for the
> worst case possible, but actually only b000-c000 was needed (because
> most of the tables were already there): no problem.
>   

Drat.  I think you may be right.

    J

Re: [Bug #11313] Plugging HDMI causes "unable to handle kernel paging request"

[Yinghai Lu]

On Thu, Aug 21, 2008 at 11:13 AM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:> Rafał Miłecki wrote:>> I added full dmesg 5 minutes after adding grepped:>> http://bugzilla.kernel.org/attachment.cgi?id=17331>>>> OK, I think I see the problem (pasted from bugzilla comment):>>>>>>> Some notes as I pick through all the evidence so far:>> - the crash is specifically because there are reserved bits set in the pmd> - the pmd is b02a00043a6001a3 in both cases> - the vaddr is ffff88013a600000 in the first crash, and>               ffff81013a6d1c00 in the second>  corresponding to the same large-page pmd mapping of phys page 0x13a600000> - this maps to e820 entry>  BIOS-e820: 0000000100000000 - 0000000140000000 (usable)> - the corresponding boot-time mapping is>> init_memory_mapping>  0100000000 - 0140000000 page 2M> kernel direct mapping tables up to 140000000 @ b000-11000>                                               ^^^^^^^^^^
this is just estimated. and worst case.
> addr 100000000 reusing pgd 201880 0000000000202063> last_map_addr: 140000000 end: 140000000>> !!! and the memory allocated for this pagetable is:>  #5 [0000008000 - 000000b000]          PGTABLE ==> [0000008000 - 000000b000]>  #6 [000000b000 - 000000c000]          PGTABLE ==> [000000b000 - 000000c000]>                                                     ^^^^^^^^^^^^^^^^^^^^^^^this is correct value used finally.>> IOW, it's mapping using b000-11000, but it has only reserved b000 - c000>> Also, this is right in the middle of the ISA area, which seems risky.> <<<<
YH˙ôčş{.nÇ+‰ˇŸŽ‰­†+%ŠË˙ąéÝś\x17ĽŠw˙ş{.nÇ+‰ˇĽŠ{ąţGŤé˙Š{ayş\x1dʇڙë,j\a­˘fŁ˘ˇhšďę˙‘ęçz_čŽ\x03(­éšŽŠÝ˘j"ú\x1aś^[m§˙˙ž\aŤţGŤé˙˘¸?™¨č­Ú&Łř§~áśiO•ćŹzˇšvŘ^\x14\x04\x1aś^[m§˙˙Ă\f˙śě˙˘¸?–IĽ

Re: [Bug #11279] 2.6.27-rc0 Power Bugs with HP/Compaq Laptops

[Rafael J. Wysocki]

On Saturday, 23 of August 2008, you wrote:
> Arrgh...I spoke too soon. It'll boot if I disable hrtimers, but I also
> have to make it use jiffies as the clocksource...so I guess we're back
> to square one. If i have hrtimers enabled, with or without
> clocksource=jiffies, I end up getting segfaults...so, I'm pretty much
> not sure what to do at this point, but relay this message to the pros.

Well, thanks for the update again.

I've added some CCs to the message, perhaps someone will have an idea what to
do next.

Thanks,
Rafafel