linux-kernel - Re: 2.6.33.3-rt16 Oops caused by umount

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Date:	Tue, 27 Apr 2010 15:54:40 -0500
From:	Xianghua Xiao <xiaoxianghua@...il.com>
To:	john stultz <johnstul@...ibm.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.33.3-rt16 Oops caused by umount

On Tue, Apr 27, 2010 at 3:30 PM, john stultz <johnstul@...ibm.com> wrote:
> On Tue, 2010-04-27 at 13:23 -0700, john stultz wrote:
>> On Tue, 2010-04-27 at 20:56 +0200, Thomas Gleixner wrote:
>> > On Tue, 27 Apr 2010, Xianghua Xiao wrote:
>> >
>> > cc'ed John
>> >
>> > > 2.6.33.2-rt13 worked fine, however on 2.6.33.3-rt16, when I do reboot, it oops:
>> > >
>> > > # reboot
>> > > # Oops: Kernel access of bad area, sig: 11 [#1]
>> > > PREEMPT 83xx Sys
>> > > Modules linked in:
>> > > NIP: c00efc68 LR: c00efc38 CTR: 00000000
>> > > REGS: ce6e3dc0 TRAP: 0300   Not tainted  (2.6.33.3-rt16)
>> > > MSR: 00009032 <EE,ME,IR,DR>  CR: 24000448  XER: 00000000
>> > > DAR: 00000038, DSISR: 20000000
>> > > TASK = cd89ccc0[1613] 'umount' THREAD: ce6e2000
>> > > GPR00: 00000000 ce6e3e70 cd89ccc0 ce6e3ddc 22222222 00000000 ce6e3e24 ce6e3e04
>> > > GPR08: 00008000 00000010 cdfa2130 cdfa26e0 44000442 100bbc1c 0fffd000 ffffffff
>> > > GPR16: 00000001 00000000 007fff00 00000000 00000000 00000001 ce6e3eb8 00000021
>> > > GPR24: 00000060 00000000 00000000 ceb94c40 00000000 ceb94cc0 c065781c ce6e3e70
>> > > NIP [c00efc68] fs_may_remount_ro+0x6c/0xd8
>> > > LR [c00efc38] fs_may_remount_ro+0x3c/0xd8
>> > > Call Trace:
>> > > [ce6e3e70] [c00efc38] fs_may_remount_ro+0x3c/0xd8 (unreliable)
>> > > [ce6e3e90] [c00f1198] do_remount_sb+0x11c/0x164
>> > > [ce6e3eb0] [c0113a3c] do_mount+0x538/0x86c
>> > > [ce6e3f10] [c0113e30] sys_mount+0xc0/0x120
>> > > [ce6e3f40] [c00178d8] ret_from_syscall+0x0/0x38
>> > > --- Exception: c01 at 0xfe5f8c4
>> > >     LR = 0x10051b88
>> > > Instruction dump:
>> > > 38000000 817d00c0 3bbd00c0 60088000 814b0000 2f8a0000 419e0008 7c00522c
>> > > 7f8be800 419e004c 812b000c 81290040 <80090028> 2f800000 419e0028 a009006e
>> > > ---[ end trace 17c711f9d369c3a3 ]---
>>
>> Hey Xianghua,
>>       What filesystem was this on? And what architecture?
>
> Also a .config would be helpful.
>
> thanks
> -john
>
>
>

John,
it's ext2 and powerpc 834x. config.gz is attached.
the same config is used on 2.6.33.2-rt13 which did not show this umount oops.
Thanks!
Xianghua

Download attachment "config.gz" of type "application/x-gzip" (12870 bytes)