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From: Mike Galbraith <efault@gmx.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	bfennema@falcon.csc.calpoly.edu
Subject: Re: [vm] writing to UDF DVD+RW (/dev/sr0) while under memory pressure: box ==> doorstop
Date: Thu, 10 Jan 2008 05:21:25 +0100	[thread overview]
Message-ID: <1199938885.4324.80.camel@homer.simson.net> (raw)
In-Reply-To: <20080109150139.311f68d3.akpm@linux-foundation.org>


On Wed, 2008-01-09 at 15:01 -0800, Andrew Morton wrote:

> So are you saying that the fs throughput is unaltered by this change,
> but that the side-effects which your workload has on the overall
> machine are lessened?

Yes.  UDF IO is still a slow trickle, but the box is now fine under VM
stress, vs all allocating tasks eventually getting nailed (essentially
forever) by iprune_mutex previously.

	-Mike

P.S.  I would submit one-liner for VFS part, but it's useless without
UDF part, and nobody is hitting what I ran into while testing alleged
scsi_done regression thingy anyway.  cc added.


  reply	other threads:[~2008-01-10  4:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-04 11:46 Mike Galbraith
2008-01-06  9:42 ` Mike Galbraith
2008-01-06 18:01   ` Mike Galbraith
2008-01-06 20:29     ` Andrew Morton
2008-01-07  5:33       ` Mike Galbraith
2008-01-07  5:55         ` Mike Galbraith
2008-01-08 11:05       ` Mike Galbraith
2008-01-08 11:38         ` Andrew Morton
2008-01-08 15:21           ` Mike Galbraith
2008-01-08 15:27             ` Mike Galbraith
2008-01-09 11:11               ` Mike Galbraith
2008-01-09 23:01                 ` Andrew Morton
2008-01-10  4:21                   ` Mike Galbraith [this message]
2008-01-10 14:41                   ` Jan Kara
2008-01-10 15:29                     ` Mike Galbraith
2008-01-10 17:16                       ` Jan Kara

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