From: Andrew Morton <akpm@osdl.org>
To: Jens Axboe <axboe@suse.de>
Cc: wli@holomorphy.com, karl.vogel@pandora.be, linux-mm@kvack.org
Subject: Re: Kernel 2.6.8.1: swap storm of death - nr_requests > 1024 on swap partition
Date: Sun, 29 Aug 2004 13:18:24 -0700 [thread overview]
Message-ID: <20040829131824.1b39f2e8.akpm@osdl.org> (raw)
In-Reply-To: <20040829141718.GD10955@suse.de>
Jens Axboe <axboe@suse.de> wrote:
>
> > > It only happens with the CFQ elevator, and this backout patch makes it go
> > > away.
> >
> > It's not bizarre, if you backout that fix (it is a fix!), ->nr_requests
> > isn't initialized when cfq gets there. So it'll throttle incorrectly in
> > may_queue, not a good idea.
>
> Oh, and I think the main issue is the vm. It should cope correctly no
> matter how much pending memory can be in progress on the queue, else it
> should not write out so much. CFQ is just exposing this bug because it
> defaults to bigger nr_requests.
That was my point.
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next prev parent reply other threads:[~2004-08-29 20:18 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040824124356.GW2355@suse.de>
[not found] ` <412CDE7E.9060307@seagha.com>
[not found] ` <20040826144155.GH2912@suse.de>
[not found] ` <412E13DB.6040102@seagha.com>
[not found] ` <412E31EE.3090102@pandora.be>
[not found] ` <41308C62.7030904@seagha.com>
[not found] ` <20040828125028.2fa2a12b.akpm@osdl.org>
[not found] ` <4130F55A.90705@pandora.be>
2004-08-28 21:43 ` Kernel 2.6.8.1: swap storm of death - nr_requests > 1024 on swap partition Andrew Morton
2004-08-28 21:54 ` William Lee Irwin III
2004-08-28 22:13 ` Andrew Morton
2004-08-28 22:28 ` William Lee Irwin III
2004-08-29 10:30 ` Andrew Morton
2004-08-29 14:15 ` Jens Axboe
2004-08-29 14:17 ` Jens Axboe
2004-08-29 14:45 ` Rik van Riel
2004-08-29 20:18 ` Andrew Morton [this message]
2004-08-29 20:30 ` Jens Axboe
2004-08-29 20:59 ` Andrew Morton
2004-08-29 22:17 ` William Lee Irwin III
2004-08-29 22:28 ` Andrew Morton
2004-08-30 7:41 ` Hugh Dickins
2004-08-30 15:20 ` Marcelo Tosatti
2004-08-30 18:01 ` Karl Vogel
2004-08-30 17:16 ` Marcelo Tosatti
2004-08-30 22:59 ` Karl Vogel
2004-08-30 20:33 ` Marcelo Tosatti
2004-08-30 22:37 ` Andrew Morton
2004-08-30 22:17 ` Marcelo Tosatti
2004-08-30 23:51 ` Andrew Morton
2004-08-31 10:23 ` Marcelo Tosatti
2004-08-31 16:02 ` Marcelo Tosatti
2004-08-31 17:50 ` Karl Vogel
2004-08-31 16:52 ` Marcelo Tosatti
2004-08-31 18:24 ` Karl Vogel
2004-08-31 17:25 ` Marcelo Tosatti
2004-08-31 19:36 ` Karl Vogel
2004-09-02 9:05 ` Rik van Riel
2004-08-30 23:02 ` Karl Vogel
2004-08-29 16:54 ` Jens Axboe
2004-08-29 17:52 ` William Lee Irwin III
2004-08-28 21:59 ` Karl Vogel
2004-08-29 16:53 ` Jens Axboe
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