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SubjectRe: [Bug #14949] drm_vm.c:drm_mmap: possible circular locking dependency detected
(Adding Greg to Cc:)

On Tue, Feb 02, 2010 at 09:46:45PM +0100, Rafael J. Wysocki wrote:
> On Monday 01 February 2010, Borislav Petkov wrote:
> > On Mon, Feb 1, 2010 at 1:22 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > > This message has been generated automatically as a part of a report
> > > of recent regressions.
> > >
> > > The following bug entry is on the current list of known regressions
> > > from 2.6.32. Please verify if it still should be listed and let me know
> > > (either way).
> > >
> > >
> > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14949
> > > Subject : drm_vm.c:drm_mmap: possible circular locking dependency detected
> > > Submitter : Borislav Petkov <petkovbb@googlemail.com>
> > > Date : 2009-12-26 9:45 (37 days old)
> > > References : http://marc.info/?l=linux-kernel&m=126182073616279&w=4
> > > Handled-By : Eric W. Biederman <ebiederm@aristanetworks.com>
> > > Patch : http://patchwork.kernel.org/patch/70461/
> >
> > Yes, this is fixed.
>
> Do you mean "fixed" as "the fix is in the Linus' tree" or "fixed" as "the
> patch fixed it for me"?

Rather the second one, i.e. it fixes it for me. The patch is named

sysfs-cache-the-last-sysfs_dirent-to-improve-readdir-scalability-v2.patch

and is "stuck" in Greg's tree. Judging by the quilt series¹, the patch
is slated for submission after 2.6.33. This late in the game for .32,
I'm guessing maybe a stable backport after .33 is out?

[1] http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/series

--
Regards/Gruss,
Boris.
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