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Thread-Topic: [ANNOUNCE] 3.0.1-rt8 - Regression to 3.0-rt7
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From: "Tim Sander" <tim.sander@hbm.com>
Organization: Hottinger Baldwin Messtechnik
To: "Peter Zijlstra" <peterz@infradead.org>
Subject: Re: [ANNOUNCE] 3.0.1-rt8 - Regression to 3.0-rt7
Date: Thu, 11 Aug 2011 18:41:09 +0200
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Cc: "linux-kernel" <linux-kernel@vger.kernel.org>,
        "Thomas Gleixner" <tglx@linutronix.de>,
        "Paul E. McKenney" <paulmck@us.ibm.com>,
        "linux-rt-users" <linux-rt-users@vger.kernel.org>
References: <1312580681.28695.44.camel@twins> <1313079285.8491.4.camel@twins> <201108111822.54953.tim.sander@hbm.com>
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Hi Peter

Am Donnerstag, 11. August 2011, 18:22:54 schrieb Tim Sander:
> Am Donnerstag, 11. August 2011, 18:14:45 schrieb Peter Zijlstra:
> > On Thu, 2011-08-11 at 18:04 +0200, Tim Sander wrote:
> > > kernel BUG at kernel/posix-cpu-timers.c:1315!
> > > Unable to handle kernel NULL pointer dereference at virtual address
> > > 00000000 pgd = c0004000
> > > [00000000] *pgd=00000000
> > > Internal error: Oops: 817 [#1] PREEMPT
> > > Modules linked in: i2c_imx(+) netx netx_reset dspload fpgaload
> > > mxc_nand(+) nand nand_ids nand_ecc CPU: 0    Not tainted
> > > (3.0.0-pmx-rt8-00009-g39305ab #167)
> > > PC is at __bug+0x24/0x30
> > > LR is at walk_stackframe+0x24/0x40
> > > pc : [<c002cbf0>]    lr : [<c002cbb0>]    psr: 60000113
> > > sp : c782ff40  ip : c782fe28  fp : c782ff4c
> > > r10: 00000001  r9 : 00000000  r8 : c78663c0
> > > r7 : c030463c  r6 : c782e000  r5 : 00000000  r4 : c78663c0
> > > r3 : 00000000  r2 : 00000001  r1 : c782fe58  r0 : 00000034
> > > Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
> > > Control: 00c5387d  Table: 87b70008  DAC: 00000017
> > > Process posixcputmr/0 (pid: 6, stack limit = 0xc782e268)
> > > Stack: (0xc782ff40 to 0xc7830000)
> > > ff40: c782ff8c c782ff50 c005a5c0 c002cbd8 00000000 c782ff54 c782ff54
> > > 00000000 ff60: 00000000 c78663c0 00000000 c782e000 c030463c c78663c0
> > > 00000000 00000001 ff80: c782ffbc c782ff90 c005a88c c005a594 00000000
> > > c7817f28 00000000 c782ffcc ffa0: c005a800 00000000 00000000 00000000
> > > c782fff4 c782ffc0 c00570f0 c005a80c ffc0: c7817f28 00000000 00000000
> > > 00000000 c782ffd0 c782ffd0 c7817f28 c0057064 ffe0: c0040868 00000013
> > > 00000000 c782fff8 c0040868 c0057070 cccdcd6c ffdec890 Backtrace:
> > > [<c002cbcc>] (__bug+0x0/0x30) from [<c005a5c0>]
> > > (__run_posix_cpu_timers+0x38/0x278) [<c005a588>]
> > > (__run_posix_cpu_timers+0x0/0x278) from [<c005a88c>]
> > > (posix_cpu_timers_thread+0x8c/0x124) [<c005a800>]
> > > (posix_cpu_timers_thread+0x0/0x124) from [<c00570f0>]
> > > (kthread+0x8c/0x94) [<c0057064>] (kthread+0x0/0x94) from [<c0040868>]
> > > (do_exit+0x0/0x2d8)
> > > 
> > >  r7:00000013 r6:c0040868 r5:c0057064 r4:c7817f28
> > > 
> > > Code: e59f0010 e1a01003 eb086a88 e3a03000 (e5833000)
> > > ---[ end trace d632afeaa11559d4 ]---
> > 
> > Yay a new one, and this is a PREEMPT_LL build right? /me goes poke at
> > it.
The last email was wrong, it was INDEED a CONFIG_PREEMPT_LL=y config.
I checked the /proc/config.gz file. It is also the rt8 kernel based on the
3.0 (and NOT the 3.0.1) kernel. Will test the stuff on 3.0.1 later or tomorrow.

Sorry i just compiled to much kernels today...

Best regards
Tim


Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

Registered as GmbH (German limited liability corporation) in the commercial register at the local court of Darmstadt, HRB 1147  
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregister des Amtsgerichts Darmstadt unter HRB 1147 
Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhorst | Aufsichtsratsvorsitzender: James Charles Webster

The information in this email is confidential. It is intended solely for the addressee. If you are not the intended recipient, please let me know and delete this email.

Die in dieser E-Mail enthaltene Information ist vertraulich und lediglich für den Empfaenger bestimmt. Sollten Sie nicht der eigentliche Empfaenger sein, informieren Sie mich bitte kurz und loeschen diese E-Mail.


From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Tim Sander" <tim.sander@hbm.com>
Subject: Re: [ANNOUNCE] 3.0.1-rt8 - Regression to 3.0-rt7
Date: Thu, 11 Aug 2011 18:41:09 +0200
Message-ID: <201108111841.10270.tim.sander@hbm.com>
References: <1312580681.28695.44.camel@twins> <1313079285.8491.4.camel@twins> <201108111822.54953.tim.sander@hbm.com>
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	"Paul E. McKenney" <paulmck@us.ibm.com>,
	"linux-rt-users" <linux-rt-users@vger.kernel.org>
To: "Peter Zijlstra" <peterz@infradead.org>
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Hi Peter

Am Donnerstag, 11. August 2011, 18:22:54 schrieb Tim Sander:
> Am Donnerstag, 11. August 2011, 18:14:45 schrieb Peter Zijlstra:
> > On Thu, 2011-08-11 at 18:04 +0200, Tim Sander wrote:
> > > kernel BUG at kernel/posix-cpu-timers.c:1315!
> > > Unable to handle kernel NULL pointer dereference at virtual addre=
ss
> > > 00000000 pgd =3D c0004000
> > > [00000000] *pgd=3D00000000
> > > Internal error: Oops: 817 [#1] PREEMPT
> > > Modules linked in: i2c_imx(+) netx netx_reset dspload fpgaload
> > > mxc_nand(+) nand nand_ids nand_ecc CPU: 0    Not tainted
> > > (3.0.0-pmx-rt8-00009-g39305ab #167)
> > > PC is at __bug+0x24/0x30
> > > LR is at walk_stackframe+0x24/0x40
> > > pc : [<c002cbf0>]    lr : [<c002cbb0>]    psr: 60000113
> > > sp : c782ff40  ip : c782fe28  fp : c782ff4c
> > > r10: 00000001  r9 : 00000000  r8 : c78663c0
> > > r7 : c030463c  r6 : c782e000  r5 : 00000000  r4 : c78663c0
> > > r3 : 00000000  r2 : 00000001  r1 : c782fe58  r0 : 00000034
> > > Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kern=
el
> > > Control: 00c5387d  Table: 87b70008  DAC: 00000017
> > > Process posixcputmr/0 (pid: 6, stack limit =3D 0xc782e268)
> > > Stack: (0xc782ff40 to 0xc7830000)
> > > ff40: c782ff8c c782ff50 c005a5c0 c002cbd8 00000000 c782ff54 c782f=
f54
> > > 00000000 ff60: 00000000 c78663c0 00000000 c782e000 c030463c c7866=
3c0
> > > 00000000 00000001 ff80: c782ffbc c782ff90 c005a88c c005a594 00000=
000
> > > c7817f28 00000000 c782ffcc ffa0: c005a800 00000000 00000000 00000=
000
> > > c782fff4 c782ffc0 c00570f0 c005a80c ffc0: c7817f28 00000000 00000=
000
> > > 00000000 c782ffd0 c782ffd0 c7817f28 c0057064 ffe0: c0040868 00000=
013
> > > 00000000 c782fff8 c0040868 c0057070 cccdcd6c ffdec890 Backtrace:
> > > [<c002cbcc>] (__bug+0x0/0x30) from [<c005a5c0>]
> > > (__run_posix_cpu_timers+0x38/0x278) [<c005a588>]
> > > (__run_posix_cpu_timers+0x0/0x278) from [<c005a88c>]
> > > (posix_cpu_timers_thread+0x8c/0x124) [<c005a800>]
> > > (posix_cpu_timers_thread+0x0/0x124) from [<c00570f0>]
> > > (kthread+0x8c/0x94) [<c0057064>] (kthread+0x0/0x94) from [<c00408=
68>]
> > > (do_exit+0x0/0x2d8)
> > >=20
> > >  r7:00000013 r6:c0040868 r5:c0057064 r4:c7817f28
> > >=20
> > > Code: e59f0010 e1a01003 eb086a88 e3a03000 (e5833000)
> > > ---[ end trace d632afeaa11559d4 ]---
> >=20
> > Yay a new one, and this is a PREEMPT_LL build right? /me goes poke =
at
> > it.
The last email was wrong, it was INDEED a CONFIG_PREEMPT_LL=3Dy config.
I checked the /proc/config.gz file. It is also the rt8 kernel based on =
the
3.0 (and NOT the 3.0.1) kernel. Will test the stuff on 3.0.1 later or t=
omorrow.

Sorry i just compiled to much kernels today...

Best regards
Tim


Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, =
Germany | www.hbm.com=20

Registered as GmbH (German limited liability corporation) in the commer=
cial register at the local court of Darmstadt, HRB 1147 =20
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of =
the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregist=
er des Amtsgerichts Darmstadt unter HRB 1147=20
Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhor=
st | Aufsichtsratsvorsitzender: James Charles Webster

The information in this email is confidential. It is intended solely fo=
r the addressee. If you are not the intended recipient, please let me k=
now and delete this email.

Die in dieser E-Mail enthaltene Information ist vertraulich und ledigli=
ch f=FCr den Empfaenger bestimmt. Sollten Sie nicht der eigentliche Emp=
faenger sein, informieren Sie mich bitte kurz und loeschen diese E-Mail=
=2E

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