From: Valdis.Kletnieks@vt.edu
To: Andrew Morton <akpm@linux-foundation.org>
Cc: penguin-kernel@i-love.sakura.ne.jp, linux-kernel@vger.kernel.org
Subject: Re: Random freeze (Re: mmotm 2008-11-19-02-19 uploaded)
Date: Fri, 21 Nov 2008 00:23:18 -0500 [thread overview]
Message-ID: <5539.1227244998@turing-police.cc.vt.edu> (raw)
In-Reply-To: Your message of "Thu, 20 Nov 2008 15:20:54 PST." <20081120152054.2f757251.akpm@linux-foundation.org>
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On Thu, 20 Nov 2008 15:20:54 PST, Andrew Morton said:
> The traditional cause of the above trace is that someone mucked up the
> block/driver/irq-routing layer and we lost an IO completion.
Yes, that would explain all the symptoms and tracebacks - everybody comes
to a screeching halt the next time they try to go to disk, while the actual
disk drive is showing zero activity.
> It's also of course possible (but less common) that someone mucked up
> the VFS. It would be interesting to revert
> do_mpage_readpage-dont-submit-lots-of-small-bios-on-boundary.patch.
I'm seeing an MTBF of about 2-3 hours when actually applying an I/O load to the
system. I'll try reverting that patch, and if it survives an entire day or
two it will be pretty strong circumstantial evidence that patch is the culprit...
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next prev parent reply other threads:[~2008-11-21 5:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-20 6:09 Tetsuo Handa
2008-11-20 23:05 ` Valdis.Kletnieks
2008-11-20 23:20 ` Andrew Morton
2008-11-21 5:23 ` Valdis.Kletnieks [this message]
2008-11-21 6:54 ` Daisuke Nishimura
2008-11-21 18:12 ` Valdis.Kletnieks
2008-11-25 2:32 Tetsuo Handa
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