From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Josh Boyer <jwboyer@fedoraproject.org>
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Jakub Jelinek" <jakub@redhat.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
stable <stable@vger.kernel.org>,
"Michel Dänzer" <michel@daenzer.net>
Subject: Re: [PATCH 3.15 33/37] Fix gcc-4.9.0 miscompilation of load_balance() in scheduler
Date: Tue, 5 Aug 2014 13:46:49 +0200 [thread overview]
Message-ID: <20140805114649.GA295@x4> (raw)
In-Reply-To: <CA+5PVA5FPD8hp_7=M-VNoUG1Mw9R0Xkn2Yo50eo28ojzrcB5Aw@mail.gmail.com>
On 2014.08.05 at 07:31 -0400, Josh Boyer wrote:
> Sorry to bring this back up after the fact, but it's important for a
> number of things in various distros. I don't disagree it should be
> disabled by default, but making it unconditional is going to force the
> distributions that care about perf, systemtap, and debuggers to
> manually revert this. That deviation is concerning because the
> upstream kernel won't easily be buildable the same way distros build
> it.
>
> I'm happy to come up with a config option patch, but I'm not sure if
> it would be accepted. Is that a possibility at this point?
Please note that https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61923
isn't fixed yet. So it would be premature to manually revert Linus'
patch yet.
When PR61923 gets fixed (and backported) its testcase could be combined
with the testcase Jakub posted earlier in this thread.
--
Markus
next prev parent reply other threads:[~2014-08-05 11:46 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-30 1:48 [PATCH 3.15 00/37] 3.15.8-stable review Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 01/37] media: staging: tighten omap4iss dependencies Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 02/37] media: media: v4l2-core: v4l2-dv-timings.c: Cleaning up code wrong value used in aspect ratio Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 03/37] media: af9035: override tuner id when bad value set into eeprom Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 04/37] media: hdpvr: fix two audio bugs Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 05/37] media: tda10071: force modulation to QPSK on DVB-S Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 06/37] nfs: only show Posix ACLs in listxattr if actually present Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 07/37] xtensa: fix sysmem reservation at the end of existing block Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 08/37] block: provide compat ioctl for BLKZEROOUT Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 09/37] block: dont assume last put of shared tags is for the host Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 10/37] libata: support the ata host which implements a queue depth less than 32 Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 11/37] libata: introduce ata_host->n_tags to avoid oops on SAS controllers Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 12/37] s390/ptrace: fix PSW mask check Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 13/37] ahci: add support for the Promise FastTrak TX8660 SATA HBA (ahci mode) Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 14/37] blkcg: dont call into policy draining if root_blkg is already gone Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 15/37] tracing: Fix wraparound problems in "uptime" trace clock Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 16/37] zram: avoid lockdep splat by revalidate_disk Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 17/37] powerpc/pseries: dynamically added OF nodes need to call of_node_init Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 18/37] slab_common: fix the check for duplicate slab names Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 19/37] Input: synaptics - add min/max quirk for pnp-id LEN2002 (Edge E531) Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 20/37] Input: fix defuzzing logic Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 21/37] coredump: fix the setting of PF_DUMPCORE Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 22/37] fuse: s_time_gran fix Greg Kroah-Hartman
2014-07-30 1:48 ` [PATCH 3.15 23/37] fuse: add FUSE_NO_OPEN_SUPPORT flag to INIT Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 24/37] pinctrl: st: Fix irqmux handler Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 25/37] parisc: Remove SA_RESTORER define Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 26/37] hwmon: (smsc47m192) Fix temperature limit and vrm write operations Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 27/37] parport: fix menu breakage Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 28/37] fs: umount on symlink leaks mnt count Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 29/37] x86_32, entry: Store badsys error code in %eax Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 32/37] mm: hugetlb: fix copy_hugetlb_page_range() Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 34/37] hwrng: virtio - ensure reads happen after successful probe Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 35/37] mm: do not call do_fault_around for non-linear fault Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 36/37] nl80211: move set_qos_map command into split state Greg Kroah-Hartman
2014-07-30 1:49 ` [PATCH 3.15 37/37] platform_get_irq: Revert to platform_get_resource if of_irq_get fails Greg Kroah-Hartman
[not found] ` <20140730014829.344302554@linuxfoundation.org>
2014-07-30 6:53 ` [PATCH 3.15 33/37] Fix gcc-4.9.0 miscompilation of load_balance() in scheduler Jakub Jelinek
2014-07-30 7:13 ` Markus Trippelsdorf
2014-07-30 7:21 ` Jakub Jelinek
2014-07-30 7:27 ` Markus Trippelsdorf
2014-07-30 15:47 ` Linus Torvalds
2014-08-05 11:31 ` Josh Boyer
2014-08-05 11:46 ` Markus Trippelsdorf [this message]
2014-08-05 15:24 ` Jakub Jelinek
2014-08-05 15:19 ` Greg Kroah-Hartman
2014-08-05 16:49 ` Linus Torvalds
2014-08-05 20:57 ` Josh Boyer
2014-08-05 21:07 ` Frank Ch. Eigler
2014-08-05 22:36 ` Linus Torvalds
2014-08-05 23:30 ` Frank Ch. Eigler
2014-08-05 23:59 ` Linus Torvalds
2014-10-06 21:05 ` [PATCH] Kbuild: Add an option to enable GCC VTA Josh Stone
2014-08-06 8:14 ` [PATCH 3.15 33/37] Fix gcc-4.9.0 miscompilation of load_balance() in scheduler Jakub Jelinek
2014-08-06 10:23 ` Måns Rullgård
2014-08-06 10:23 ` Måns Rullgård
2014-08-06 16:34 ` Alexei Starovoitov
2014-07-30 11:58 ` [PATCH 3.15 00/37] 3.15.8-stable review Satoru Takeuchi
2014-07-30 11:58 ` Satoru Takeuchi
2014-07-30 15:50 ` Greg Kroah-Hartman
2014-07-30 16:09 ` Guenter Roeck
2014-07-30 22:23 ` Greg Kroah-Hartman
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