linux-kernel - Re: [RFC] Parallelize IO for e2fsck

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Message-ID: <3673.1200975438@turing-police.cc.vt.edu>
Date:	Mon, 21 Jan 2008 23:17:18 -0500
From:	Valdis.Kletnieks@...edu
To:	David Chinner <dgc@....com>
Cc:	Valerie Henson <val@...consulting.com>,
	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, "Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger@...sterfs.com>,
	Ric Wheeler <ric@....com>
Subject: Re: [RFC] Parallelize IO for e2fsck

On Tue, 22 Jan 2008 14:38:30 +1100, David Chinner said:

> Perhaps instead of swapping immediately, a SIGLOWMEM could be sent
> to a processes that aren't masking the signal followed by a short
> grace period to allow the processes to free up some memory before
> swapping out pages from that process?

AIX had SIGDANGER some 15 years ago.  Admittedly, that was sent when
the system was about to hit OOM, not when it was about to start swapping.

I suspect both approaches have their merits...

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