linux-kernel - Re: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose when FS is under heavy write load (massive starvation)

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Message-ID: <20070428085148.GC31196@merlin.emma.line.org>
Date:	Sat, 28 Apr 2007 10:51:48 +0200
From:	Matthias Andree <matthias.andree@....de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Mike Galbraith <efault@....de>,
	LKML <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [ext3][kernels >= 2.6.20.7 at least] KDE going comatose when
	FS is under heavy write load (massive starvation)

On Fri, 27 Apr 2007, Andrew Morton wrote:

> But none of this explains a 20-minute hang, unless a *lot* of fsyncs are
> being performed, perhaps.

Another thing that is rather unpleasant (haven't yet tried fiddling with
the dirty limits) is UDF to DVD-RAM - try rsyncing /home to a DVD-RAM,
that's going to leave you with tons of dirty buffers that clear slowly
-- "watch -n 1 grep -i dirty /proc/meminfo" is boring, but elucidating...

-- 
Matthias Andree
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