linux-kernel - Re: 2.6.22-rc6-mm1 -- Problems with suspend/resume.

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Date:	Tue, 3 Jul 2007 20:45:41 -0700
From:	"Miles Lane" <miles.lane@...il.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.22-rc6-mm1 -- Problems with suspend/resume.

On 7/3/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Tue, 3 Jul 2007 18:09:29 -0700 "Miles Lane" <miles.lane@...il.com> wrote:
>
> > Sorry.  I don't know who else to include in the To: list.  Should I
> > send this again with .config information?  Would ps -Af help?
>
> Gosh, what a lot of output we generated.  It's pretty digestible though.
>
> It looks like these are the problem:
>
> cat           D 0000002B     0  5603      1 (NOTLB)
>        c8102e4c 00000096 80cc15ad 0000002b c1176c2c c8102e38 00000046 c7fb2bc0
>        c7fb2d50 c265c100 80cc15ad 0000002b 00000000 c8102e4c c7f12d00 c014b438
>        00000001 c036759c c63b6914 c8102e68 c63b68e0 00000246 c8102e88 c0367416
> Call Trace:
>  [<c0367416>] __mutex_lock_slowpath+0x1c7/0x32c
>  [<c036759c>] mutex_lock+0x21/0x24
>  [<f8ac10ca>] drm_vma_info+0x1f/0x310 [drm]
>  [<c01b514d>] proc_file_read+0x108/0x222
>  [<c01b19ed>] proc_reg_read+0x63/0x76
>  [<c01834aa>] vfs_read+0xb0/0x139
>  [<c018390e>] sys_read+0x3d/0x72
>  [<c0108162>] sysenter_past_esp+0x6b/0xb5
>  [<ffffe410>] 0xffffe410
>  =======================
> INFO: lockdep is turned off.
> tail          D 0000002C     0  5646      1 (NOTLB)
>        c811ce4c 00000096 7137dc36 0000002c c1175f98 c811ce38 00000046 c80e15e0
>        c80e1770 c265c100 7137dc36 0000002c 00000000 c811ce4c c7f11e00 c014b438
>        00000001 c036759c c63b6914 c811ce68 c63b68e0 00000246 c811ce88 c0367416
> Call Trace:
>  [<c0367416>] __mutex_lock_slowpath+0x1c7/0x32c
>  [<c036759c>] mutex_lock+0x21/0x24
>  [<f8ac10ca>] drm_vma_info+0x1f/0x310 [drm]
>  [<c01b514d>] proc_file_read+0x108/0x222
>  [<c01b19ed>] proc_reg_read+0x63/0x76
>  [<c01834aa>] vfs_read+0xb0/0x139
>  [<c018390e>] sys_read+0x3d/0x72
>  [<c0108162>] sysenter_past_esp+0x6b/0xb5
>  [<ffffe410>] 0xffffe410
>  =======================
> INFO: lockdep is turned off.
> cat           D 00000033     0  5910      1 (NOTLB)
>        c8107e4c 00000096 24ccdd52 00000033 c014b438 00000001 c8107e14 c7e9ed60
>        c7e9eef0 c265c100 24ccdd52 00000033 00000000 c8107e4c c7f11b80 c014b438
>        00000001 c036759c c63b6914 c8107e68 c63b68e0 00000246 c8107e88 c0367416
> Call Trace:
>  [<c0367416>] __mutex_lock_slowpath+0x1c7/0x32c
>  [<c036759c>] mutex_lock+0x21/0x24
>  [<f8ac10ca>] drm_vma_info+0x1f/0x310 [drm]
>  [<c01b514d>] proc_file_read+0x108/0x222
>  [<c01b19ed>] proc_reg_read+0x63/0x76
>  [<c01834aa>] vfs_read+0xb0/0x139
>  [<c018390e>] sys_read+0x3d/0x72
>  [<c0108162>] sysenter_past_esp+0x6b/0xb5
>  [<ffffe410>] 0xffffe410
>  =======================
> INFO: lockdep is turned off.
> cat           D 00000033     0  5926      1 (NOTLB)
>        c8160e4c 00000096 8cc85f27 00000033 c117483c c8160e38 00000046 c80e0af0
>        c80e0c80 c265c100 8cc85f27 00000033 00000000 c8160e4c c7f13480 c014b438
>        00000001 c036759c c63b6914 c8160e68 c63b68e0 00000246 c8160e88 c0367416
> Call Trace:
>  [<c0367416>] __mutex_lock_slowpath+0x1c7/0x32c
>  [<c036759c>] mutex_lock+0x21/0x24
>  [<f8ac10ca>] drm_vma_info+0x1f/0x310 [drm]
>  [<c01b514d>] proc_file_read+0x108/0x222
>  [<c01b19ed>] proc_reg_read+0x63/0x76
>  [<c01834aa>] vfs_read+0xb0/0x139
>  [<c018390e>] sys_read+0x3d/0x72
>  [<c0108162>] sysenter_past_esp+0x6b/0xb5
>  [<ffffe410>] 0xffffe410
>  =======================
> INFO: lockdep is turned off.
> cat           D 00000034     0  5950      1 (NOTLB)
>        c8084e4c 00000096 39b9c536 00000034 c117afbc c8084e38 00000046 c6ce15e0
>        c6ce1770 c265c100 39b9c536 00000034 00000000 c8084e4c c7f13200 c014b438
>        00000001 c036759c c63b6914 c8084e68 c63b68e0 00000246 c8084e88 c0367416
> Call Trace:
>  [<c0367416>] __mutex_lock_slowpath+0x1c7/0x32c
>  [<c036759c>] mutex_lock+0x21/0x24
>  [<f8ac10ca>] drm_vma_info+0x1f/0x310 [drm]
>  [<c01b514d>] proc_file_read+0x108/0x222
>  [<c01b19ed>] proc_reg_read+0x63/0x76
>  [<c01834aa>] vfs_read+0xb0/0x139
>  [<c018390e>] sys_read+0x3d/0x72
>  [<c0108162>] sysenter_past_esp+0x6b/0xb5
>  [<ffffe410>] 0xffffe410
>  =======================
>
> and I'm guessing that this kernel is one which has already oopsed in
> drm_vma_info()?
>
> If so, then problem solved: it oopsed with the lock held.  If not, then
> perhaps we have another problem in DRM.  Or the same one remanifesting.

Yes, it is.  Thanks.  Should I not report stuff like this when it is
generated after an OOPS?
Sorry to trouble you.

      Miles
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