Re: EXT4: kernel BUG at fs/jbd2/commit.c:533!

[Sachin Sant <sachinp@in.ibm.com>]

Sachin Sant wrote:
> While executing fsstress against ext4 with 2.6.31-rc8 on a
> powerpc box, ran into the following Bug.
>
> ------------[ cut here ]------------
> cpu 0x0: Vector: 700 (Program Check) at [c0000000f3ae3970]
>    pc: c000000000280f28: .jbd2_journal_commit_transaction+0x8ac/0x1bfc
>    lr: c000000000280e58: .jbd2_journal_commit_transaction+0x7dc/0x1bfc
>    sp: c0000000f3ae3bf0
>   msr: 8000000000029032
>  current = 0xc0000000f315c7d0
>  paca    = 0xc000000000b62600
>    pid   = 23139, comm = kjournald2
> kernel BUG at fs/jbd2/commit.c:533!
> enter ? for help
> [c0000000f3ae3dd0] c000000000289c60 .kjournald2+0x198/0x46c
> [c0000000f3ae3ed0] c0000000000a86a0 .kthread+0xac/0xb8
> [c0000000f3ae3f90] c00000000002ab3c .kernel_thread+0x54/0x70
> 0:mon>
> Ext4 FS was created and mounted using :
>
> /usr/local/e2fsprogs/sbin/mkfs.ext4 -b 4096 /dev/sda4
> mount -t ext4 -o errors=panic,data=journal /dev/sda4 /mnt/tmp/
I still have this bug with 2.6.31. Is there a solution
available for this ?

Let me know if i can help debug this in any way ?

Thanks
-Sachin

>
> Register information from xmon debugger :
> 0:mon> r
> R00 = 0000000000000001   R16 = c0000000334e0160
> R01 = c0000000f3ae3bf0   R17 = 0000000000000000
> R02 = c000000000a6f1e8   R18 = 0000000000000000
> R03 = c0000000e87c9024   R19 = 0000000000000001
> R04 = c0000000334e0100   R20 = 0000000000000001
> R05 = 0000000000000409   R21 = 0000000000000409
> R06 = 0000000000000000   R22 = c0000000f3ae3c78
> R07 = c0000000f315c7d0   R23 = 0000000000000000
> R08 = c000000000b62600   R24 = c0000000e87c9000
> R09 = 00000000000000a0   R25 = c0000000334e0170
> R10 = c0000000f3ae0080   R26 = c0000000334e0100
> R11 = 0000000100051657   R27 = c0000000334e0150
> R12 = 0000000024000088   R28 = c0000000f3ae3c78
> R13 = c000000000b62600   R29 = c0000000f315c7d0
> R14 = c0000000008325c8   R30 = c0000000009ec158
> R15 = c0000000e87c939c   R31 = 0000000000000000
> pc  = c000000000280f28 .jbd2_journal_commit_transaction+0x8ac/0x1bfc
> lr  = c000000000280e58 .jbd2_journal_commit_transaction+0x7dc/0x1bfc
> msr = 8000000000029032   cr  = 24000084
> ctr = 0000000000000000   xer = 0000000020000001   trap =  700
> 0:mon>
>
> e2fsprog utility version is :
>
> # /usr/local/e2fsprogs/sbin/mkfs.ext4 -V
> mke2fs 1.41.6 (30-May-2009)
>        Using EXT2FS Library version 1.41.6
>
> Let me know if i can provide any other information.
>
> Thanks
> -Sachin
>


-- 

---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
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