linux-ext4 - Re: next-20090310: ext4 hangs

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Message-ID: <a4423d670904021150p5fcd1f82wefa68c839b2869a1@mail.gmail.com>
Date:	Thu, 2 Apr 2009 22:50:59 +0400
From:	Alexander Beregalov <a.beregalov@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	Theodore Tso <tytso@....edu>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	linux-ext4@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	sparclinux@...r.kernel.org
Subject: Re: next-20090310: ext4 hangs

>> >  I'm helpless here. I don't see how we can miss a wakeup (plus you seem to
>> > be the only one reporting the bug). Could you please compile and test the kernel
>> > with the attached patch? It will print to kernel log when we go to sleep
>> > waiting for inode commit and when we send wakeups etc. When you hit the
>> > deadlock, please send me your kernel log. It should help with debugging why do
>> > we miss the wakeup. Thanks.
>>
>> Which patch?
>  Ups. Forgot to attach ;).

Cannot reproduce it on current 2.6.29-git. Strange.
It should already have all ext4/jbd2 patches from next-20090310,
but anyway it happened with 2.6.29-rc8 also.
I ran dbench in cycle on two indentical hosts for more than 24 hours
with no hang tasks.

I will try 2.6.29.
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