linux-kernel - Re: [PATCH 00/23] per device dirty throttling -v8

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Message-ID: <20070804103347.GA1956@elte.hu>
Date:	Sat, 4 Aug 2007 12:33:47 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, miklos@...redi.hu,
	akpm@...ux-foundation.org, neilb@...e.de, dgc@....com,
	tomoki.sekiyama.qu@...achi.com, nikita@...sterfs.com,
	trond.myklebust@....uio.no, yingchao.zhou@...il.com,
	richard@....demon.co.uk
Subject: Re: [PATCH 00/23] per device dirty throttling -v8


* Ingo Molnar <mingo@...e.hu> wrote:

> [ my personal interest in this is the following regression: every time 
>   i start a large kernel build with DEBUG_INFO on a quad-core 4GB RAM 
>   box, i get up to 30 seconds complete pauses in Vim (and most other 
>   tasks), during plain editing of the source code. (which happens when 
>   Vim tries to write() to its swap/undo-file.) ]

hm, it turns out that it's due to vim doing an occasional fsync not only 
on writeout, but during normal use too. "set nofsync" in the .vimrc 
solves this problem.

	Ingo
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