Girish Shilamkar wrote:
Hi Avantika,
From initial code review I think oops in crc32_be is caused as
bh->b_data passed to the function is NULL. Most probably something might
have gone wrong in jbd2_journal_write_metadata_buffer() making bh->data
= 0.
Does the error go away, when run without journal_checksum patch/option ?
I tried running fsstress without the journal_checksum option set and
didn't see any errors. But I got the oops again when I mounted with
journal_checksum.
thank you for looking into this.
Avantika
On Thu, 2007-08-30 at 11:16 -0700, Avantika Mathur wrote:
Hi Girish,
When running fsstress on an x86 machine, I hit the kernel oops below. The
ext4-patch-queue is being tested including the journal checksum patches
I have mounted with -o delalloc,mballoc,data=writeback,journal_checksum
I did not get a chance to look in detail; but it looks like a journal issue.
Do you know what the issue might be?
BUG: unable to handle kernel NULL pointer dereference at virtual address
00000000
printing eip:
c118ba5d
*pdpt = 000000002560a001
*pde = 0000000000000000
Oops: 0000 [#1]
SMP
Modules linked in:
CPU: 1
EIP: 0060:[<c118ba5d>] Not tainted VLI
EFLAGS: 00010257 (2.6.23-rc4-autokern1 #1)
EIP is at crc32_be+0x3d/0x9c
eax: 7e78a276 ebx: 76a2787e ecx: 00000400 edx: 00000000
esi: 00000000 edi: 00000000 ebp: f56e5200 esp: e61f9e90
ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
Process kjournald2 (pid: 5388, ti=e61f8000 task=e3efc000 task.ti=e61f8000)
Stack: ef5fffc0 00000016 c10c762d 0000055e 00000000 00000000 00001000 00000000
f50e3e80 7e78a276 00000008 00000000 00000544 eb46aab4 eb46aabc 00000155
f585f800 e1e1c968 00000000 eb059428 0000055e 00000000 00000000 e3efc000
Call Trace:
[<c10c762d>] jbd2_journal_commit_transaction+0x92a/0x128d
[<c1029e51>] autoremove_wake_function+0x0/0x33
[<c1029e51>] autoremove_wake_function+0x0/0x33
[<c10214f4>] try_to_del_timer_sync+0x42/0x48
[<c10ca4fd>] kjournald2+0x130/0x307
[<c1029e51>] autoremove_wake_function+0x0/0x33
[<c129171c>] __sched_text_start+0x364/0x3ff
[<c1029e51>] autoremove_wake_function+0x0/0x33
[<c10ca3cd>] kjournald2+0x0/0x307
[<c1029a27>] kthread+0x34/0x55
[<c10299f3>] kthread+0x0/0x55
[<c1003173>] kernel_thread_helper+0x7/0x10
=======================
Code: 42 30 d8 0f b6 c0 c1 eb 08 33 1c 85 e0 ae 2a c1 49 74 05 f6 c2 03 75 e5 83 f9 03 76 4c 89 ce 83 ea 04 83 e6 03 c1 e9 02 83 c2 04 <33> 1a 0f b6 c3 c1 eb 08 33 1c 85 e0 ae 2a c1 0f b6 c3 c1 eb 08
EIP: [<c118ba5d>] crc32_be+0x3d/0x9c SS:ESP 0068:e61f9e90
-- 0:conmux-control -- time-stamp -- Aug/30/07 0:36:46 --
-- 0:conmux-control -- time-stamp -- Aug/30/07 5:56:32 --
(bot:conmon-payload) disconnected
thanks,
Avantika
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