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SubjectRe: Kernel 2.6.19.2 New RAID 5 Bug (oops when writing Samba -> RAID5)


On Sat, 20 Jan 2007, Justin Piszcz wrote:

> My .config is attached, please let me know if any other information is
> needed and please CC (lkml) as I am not on the list, thanks!
>
> Running Kernel 2.6.19.2 on a MD RAID5 volume. Copying files over Samba to
> the RAID5 running XFS.
>
> Any idea what happened here?
>

It happened again under heavy read I/O when I was running md5sum -c on
some of my files.

[ 551.942958] BUG: unable to handle kernel paging request at virtual address fffb97b0
[ 551.942970] printing eip:
[ 551.942972] c0358bd8
[ 551.942974] *pde = 00003067
[ 551.942976] *pte = 00000000
[ 551.942980] Oops: 0002 [#1]
[ 551.942982] PREEMPT SMP
[ 551.942989] CPU: 0
[ 551.942990] EIP: 0060:[<c0358bd8>] Not tainted VLI
[ 551.942991] EFLAGS: 00010286 (2.6.19.2 #1)
[ 551.942999] EIP is at copy_data+0x130/0x179
[ 551.943001] eax: 00000000 ebx: 00001000 ecx: 00000214 edx: fffb9000
[ 551.943005] esi: dd2007b0 edi: fffb97b0 ebp: 00001000 esp: f76ffe1c
[ 551.943007] ds: 007b es: 007b ss: 0068
[ 551.943011] Process md4_raid5 (pid: 1309, ti=f76fe000 task=f7081560 task.ti=f76fe000)
[ 551.943013] Stack: c1d880c0 00000003 cd2f0540 00000000 dd200000 0000000e 00000000 000000a8
[ 551.943027] 00001000 cd2f0540 dd1f1adc f6435c48 dd1f1ad8 c035a977 34f3db20 c027be16
[ 551.943043] c0553328 00000002 00000002 c01146b9 f6435c48 c0553328 f6435c48 dd1f193c
[ 551.943056] Call Trace:
[ 551.943059] [<c035a977>] handle_stripe+0x1ca/0x2986
[ 551.943065] [<c027be16>] __next_cpu+0x22/0x33
[ 551.943072] [<c01146b9>] find_busiest_group+0x124/0x4fd
[ 551.943136] [<c01140af>] __wake_up+0x32/0x43
[ 551.943140] [<c03580e0>] release_stripe+0x21/0x2e
[ 551.943145] [<c035d233>] raid5d+0x100/0x161
[ 551.943150] [<c036b03c>] md_thread+0x40/0x103
[ 551.943155] [<c012dbbe>] autoremove_wake_function+0x0/0x4b
[ 551.943160] [<c036affc>] md_thread+0x0/0x103
[ 551.943165] [<c012da1a>] kthread+0xfc/0x100
[ 551.943169] [<c012d91e>] kthread+0x0/0x100
[ 551.943173] [<c0103b4b>] kernel_thread_helper+0x7/0x1c
[ 551.943178] =======================
[ 551.943180] Code: 8b 4c 24 08 8b 41 2c 8b 4c 24 1c 03 54 08 08 8b 44 24
0c 85 c0 0f 85 3a ff ff ff 89 d9 c1 e9 02 8b 44 24 18 8d 3c 02 03 74 24 10
<f3> a5 89 d9 83 e1 03 74 02 f3 a4 e9 37 ff ff ff 01 ee 89 74 24
[ 551.943254] EIP: [<c0358bd8>] copy_data+0x130/0x179 SS:ESP 0068:f76ffe1c
[ 551.943262] <6>note: md4_raid5[1309] exited with preempt_count 3

I will run resync/check on this array and then see if that fixes it.

Justin.
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