linux-kernel - Re: [PATCH] Allow SysRq emergency sync to thaw frozen filesystems

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Message-ID: <17214.1232120028@turing-police.cc.vt.edu>
Date:	Fri, 16 Jan 2009 10:33:48 -0500
From:	Valdis.Kletnieks@...edu
To:	Eric Sandeen <sandeen@...deen.net>
Cc:	Eric Sandeen <sandeen@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	t-sato@...jp.nec.com
Subject: Re: [PATCH] Allow SysRq emergency sync to thaw frozen filesystems

On Thu, 15 Jan 2009 21:59:10 CST, Eric Sandeen said:

> Oh, actually, I'd think not.  If the freeze was done properly by the
> filesystem, all data was flushed, the fs was quiesced, and new IO was
> blocked.  pdflush should never be visiting these...

Yes, but a lot of 'if's - and usually you're reaching for sysrq-S precisely
*because* you suspect that stuff wasn't happening properly on its own...

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