linux-ext4 - Re: [PATCH] Attempt to sync the fsstress writes to a frozen F.S

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Message-ID: <20110527162803.GA21260@quack.suse.cz>
Date:	Fri, 27 May 2011 18:28:03 +0200
From:	Jan Kara <jack@...e.cz>
To:	Theodore Tso <tytso@....EDU>
Cc:	surbhi.palande@...onical.com, sandeen@...hat.com, jack@...e.cz,
	marco.stornelli@...il.com, adilger.kernel@...ger.ca,
	toshi.okajima@...fujitsu.com, m.mizuma@...fujitsu.com,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] Attempt to sync the fsstress writes to a frozen F.S

  Ted,

On Wed 25-05-11 08:12:15, Ted Tso wrote:
> Just as a request --- could you start a new thread (this one is getting
> so long it's hard to follow)?
> 
> And could you also include a reliable reproduction case?
  Just a quick note - this patch series was not really meant to fix the
deadlocks. They are meant to make freezing reliable in combination with
mmapped writes. As a side-effect, they make the deadlock Surbhi describes
less probable but I'm aware it's still there.

I plan to have another look at how the deadlock could be fixed (the first
attempt was rejected by Dave Chinner) but currently I'm busy with other
stuff...

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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