[dm-devel] "dm io" slab cache object not released in snapshot test
Yue Xu
yuex_rsh at yahoo.com
Tue Oct 19 21:11:23 UTC 2004
--- Alasdair G Kergon <agk at redhat.com> wrote:
> On Wed, Oct 13, 2004 at 09:17:02AM -0700, Yue Xu
> wrote:
> > I can reproduce a bug by running a lvm2 snapshot
> test
>
> Nice that it's reproducible!
>
> Firstly, we've just checked newer 2.4 kernel patches
> into
> device-mapper CVS: please re-test with them.
Thanks for the advices. I checked out patches from CVS
and the test fails on both of the following kernels:
1. vanilla kernel 2.4.27 +
linux-2.4.27-devmapper-ioctl.patch +
linux-2.4.22-VFS-lock.patch
2. vanilla kernel 2.4.28-pre4 +
linux-2.4.28-pre4-devmapper-ioctl.patch +
linux-2.4.22-VFS-lock.patch
>
> If it still goes wrong, please try to provide the
> full set of
> (processed) kernel error messages.
Here they are:
kmem_cache_destroy: Can't free all objects edd28ecc
kernel BUG at slab.c:815!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c013747a>] Not tainted
EFLAGS: 00010246
eax: 00000000 ebx: ec1bd35c ecx: f7c39c5c edx:
edd28f38
esi: edd28f2a edi: f889183e ebp: f7857ed0 esp:
f7857ea4
ds: 0018 es: 0018 ss: 0018
Process modprobe (pid: 6859, stackpage=f7857000)
Stack: ec1bd35c 0000001c 00000000 f7857ec0 ec1bd37c
edd28f38 fffffffc 0000000c
00000000 00000000 00000000 f7857ef0 f888861f
f8891838 0000001c 00000080
00020000 00000000 00000000 f7857f04 f888867f
ffffffea 00000000 00000000
Call Trace: [<f888861f>] [<f8891838>] [<f888867f>]
[<c011f224>] [<f8888060>]
[<f8888060>] [<f8893028>] [<f8888060>] [<c0109187>]
Code: 0f 0b 2f 03 b4 e4 33 c0 8b 01 89 ca 89 c1 0f 18
00 81 fa ec
>
> Other things to try:
> Does it still fail if you miss out the xfs_freeze
> commands?
Yes, and it also fails if I remove the norecovery
option when mounting file system.
> Does it fail if you use ext3 instead of xfs?
No. Not in ext2 either.
If you need more infomation, please tell me. Thanks!
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