[Ocfs2-devel] buffer not mapped?

[Ling, Xiaofeng]

2.4.20-UP kernel.=20

>-----Original Message-----
>From: Zhang, Sonic=20
>Sent: 2004=C4=EA5=D4=C211=C8=D5 1:20
>To: Ling, Xiaofeng; ocfs2-devel at oss.oracle.com
>Subject: RE: [Ocfs2-devel] buffer not mapped?
>
>Is this bug found under kernel 2.4 or 2.6?
>
>*********************************************
>Sonic Zhang
>Software Engineer
>Intel China Software Lab
>Tel: (086)021-52574545-1667
>iNet: 752-1667
>*********************************************=20
>
>-----Original Message-----
>From: ocfs2-devel-bounces at oss.oracle.com=20
>[mailto:ocfs2-devel-bounces at oss.oracle.com] On Behalf Of Ling, Xiaofeng
>Sent: 2004=C4=EA5=D4=C29=C8=D5 1:13
>To: ocfs2-devel at oss.oracle.com
>Subject: [Ocfs2-devel] buffer not mapped?
>
>This is what I found on svn 907
>
>2.4.20-UP kernel
>Steps:
>1.format
>2.mount
>3.read/write
>4.umount
>5.unload module
>system show as follows, some times it may delay some seconds and=20
>it shows in kupdated.
>--------------------------------
> BUG at ll_rw_blk.c:937!
>invalid operand: 0000
>CPU:    0
>EIP:    0010:[<c01c369e>]    Not tainted
>EFLAGS: 00010246
>eax: 00000800   ebx: 00000000   ecx: d0098a80   edx: 00000001
>esi: 00000001   edi: 003e823f   ebp: c037dbc4   esp: cc001df4
>ds: 0018   es: 0018   ss: 0018
>Process ocfs2nm-0 (pid: 3273, stackpage=3Dcc001000)
>Stack: cc000000 5d700000 000007f9 e0882e2d d4d765e0 de6f51a0 c01120dc
>e0882e2d
>       d4d76e20 00000800 c037dbec cc000000 00000000 00000001 0000002a
>00000000
>       d0098a80 00000001 003e823f 0000002a c01c3caa c037dbc4 00000000
>d0098a80
>Call Trace:    [<e0882e2d>] [<c01120dc>] [<e0882e2d>] [<c01c3caa>]
>[<c01c3d59>]
>  [<e0891e44>] [<e0882904>] [<e08a86e9>] [<c012320b>] [<c011432b>]
>[<c01182ba>]
>  [<c01073d2>] [<c010578e>] [<e08a81d8>]
>
>Code: 0f 0b a9 03 99 7c 2c c0 8b 44 24 5c 0f b7 48 14 c7 44 24 20
> .SH
>
>ll_rw_blk.c:937 is in function __make_request()
>as:
>if (!buffer_mapped(bh))
>   BUG();
>
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