Re: drm_vm.c:drm_mmap: possible circular locking dependency detected

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From: Tejun Heo
Date: Saturday, January 2, 2010 - 11:05 pm

Hello,

On 01/03/2010 02:38 PM, Eric W. Biederman wrote:

Ah... okay, now I remember this.  Yeah, I ripped off module ref
counting from sysfs ops.  I completely forgot about that and was
thinking we still had module ref counting on sysfs ops.  The logical
thing to do would be restoring module ref counting on sysfs ops which
won't go through active ref counting.  ie. Let the interface which
switch off active ref counting require module owner so that it uses
module ref counting instead of active ref counting.

Thanks.

-- 
tejun
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Linux 2.6.33-rc2 - Merry Christmas ..., Linus Torvalds, (Thu Dec 24, 3:00 pm)
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Re: Linux 2.6.33-rc2 - Blank screen for Intel KMS, Miguel Calleja, (Fri Dec 25, 6:10 am)
Re: -tip: origin tree boot crash, Dmitry Torokhov, (Fri Dec 25, 12:49 pm)
Re: Linux 2.6.33-rc2 - Merry Christmas ..., Borislav Petkov, (Fri Dec 25, 1:00 pm)
Re: Linux 2.6.33-rc2 - Merry Christmas ..., Borislav Petkov, (Fri Dec 25, 2:50 pm)
Re: Linux 2.6.33-rc2 - Merry Christmas ..., Jesse Barnes, (Fri Dec 25, 11:00 pm)
Re: Linux 2.6.33-rc2 - Merry Christmas ..., Borislav Petkov, (Sat Dec 26, 1:02 am)
Re: -tip: origin tree boot crash, Len Brown, (Sat Dec 26, 1:17 pm)
Re: -tip: origin tree boot crash, Len Brown, (Sat Dec 26, 1:19 pm)
Re: -tip: origin tree boot crash, Len Brown, (Sat Dec 26, 9:20 pm)
Re: -tip: origin tree boot crash, Ingo Molnar, (Mon Dec 28, 2:44 am)
Re: -tip: origin tree boot crash, Ingo Molnar, (Mon Dec 28, 5:01 am)
Re: -tip: origin tree boot crash, Paul Rolland, (Mon Dec 28, 8:02 am)
Re: -tip: origin tree boot crash, Paul Rolland, (Mon Dec 28, 9:15 am)
Re: -tip: origin tree boot crash, Paul Rolland, (Mon Dec 28, 9:53 am)
Re: -tip: origin tree boot crash, Dmitry Torokhov, (Mon Dec 28, 1:17 pm)
Re: Linux 2.6.33-rc2 - Blank screen for Intel KMS, Miguel Calleja, (Tue Dec 29, 2:50 am)
Re: Linux 2.6.33-rc2 - Blank screen for Intel KMS, Rafael J. Wysocki, (Tue Dec 29, 7:01 am)
Re: -tip: origin tree boot crash, Len Brown, (Tue Dec 29, 11:14 pm)
Re: -tip: origin tree boot crash, Paul Rolland, (Wed Dec 30, 12:13 am)
Re: drm_vm.c:drm_mmap: possible circular locking dependenc ..., Eric W. Biederman, (Wed Dec 30, 2:34 pm)
Re: drm_vm.c:drm_mmap: possible circular locking dependenc ..., Eric W. Biederman, (Thu Dec 31, 1:40 am)
Re: drm_vm.c:drm_mmap: possible circular locking dependenc ..., Eric W. Biederman, (Thu Dec 31, 1:40 am)
Re: drm_vm.c:drm_mmap: possible circular locking dependenc ..., Eric W. Biederman, (Sat Jan 2, 10:38 pm)
Re: drm_vm.c:drm_mmap: possible circular locking dependenc ..., Tejun Heo, (Sat Jan 2, 11:05 pm)
Re: drm_vm.c:drm_mmap: possible circular locking dependenc ..., Eric W. Biederman, (Mon Jan 4, 12:43 pm)
Re: [PATCH] sysfs: Add lockdep annotations for the sysfs a ..., Eric W. Biederman, (Sun Jan 17, 10:18 am)
Re: [PATCH] sysfs: Add lockdep annotations for the sysfs a ..., Dominik Brodowski, (Sun Jan 17, 11:03 am)