From: Davide Libenzi <davidel@xmailserver.org>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
Denys Fedoryshchenko <denys@visp.net.lb>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: 2.6.24-rc7 to 2.6.24-rc8 possible regression
Date: Tue, 22 Jan 2008 14:54:25 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0801221453420.15585@alien.or.mcafeemobile.com> (raw)
In-Reply-To: <tkrat.fcd947ba88aa56a8@s5r6.in-berlin.de>
On Tue, 22 Jan 2008, Stefan Richter wrote:
> (adding Cc: Davide and akpm)
>
> On 22 Jan, Peter Zijlstra wrote:
> >
> > On Tue, 2008-01-22 at 17:23 +0100, Stefan Richter wrote:
> >> Denys Fedoryshchenko wrote:
> >> > No, i am using vanilla kernel. It is one of production machines, and as i
> >> > know screen is not using epoll.
> >>
> >> OK, but the trace shows that it is the epoll recursion again.
> >>
> >> > I will try to apply on all my production machines this patch. Sorry if it is
> >> > related.
> >>
> >> Well, let's hope that the lockdep annotation or whatever other fix gets
> >> into mainline sooner than later. Which reminds me to test my setup
> >> again which appeared to be able to reproduce the __wake_up recursion on
> >> my command...
> >
> > Would be appreciated, I have been waiting on testing feedback because
> > I'm not fully certain here.
> >
> > Curious though that this gets reported frequently the last few weeks,
> > afaics this problem is way old.
>
> Here is a report against Fedora's 2.6.23-0.222.rc9.git4.fc8, filed in
> October: https://bugzilla.redhat.com/show_bug.cgi?id=323411
>
> I did several tests with a pristine 2.6.24-rc8 now. The lockdep warning
> below is 100% reliably triggered by grabbing video from a DV camcorder
> with dvgrab v3 via firewire-core's character device file ABI.
>
> Also, this warning is 100% reliably suppressed by your annotation patch.
> I will reply to this message with this patch for kind consideration by
> those concerned. :-)
Patch? Where is it?
- Davide
prev parent reply other threads:[~2008-01-22 22:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-21 16:06 2.6.24-rc7 to 2.6.24-rc8 possible regression Denys Fedoryshchenko
2008-01-21 22:45 ` Stefan Richter
2008-01-22 11:10 ` Denys Fedoryshchenko
2008-01-22 16:23 ` Stefan Richter
2008-01-22 16:28 ` Peter Zijlstra
2008-01-22 22:51 ` Stefan Richter
2008-01-22 22:54 ` [PATCH] lockdep: annotate epoll Stefan Richter
2008-01-22 22:59 ` Davide Libenzi
2008-01-22 22:54 ` Davide Libenzi [this message]
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