From: William Lee Irwin III <wli@holomorphy.com>
To: Jens Axboe <axboe@suse.de>
Cc: Andrew Morton <akpm@osdl.org>, 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 10:52:34 -0700 [thread overview]
Message-ID: <20040829175234.GQ5492@holomorphy.com> (raw)
In-Reply-To: <20040829165458.GD11219@suse.de>
On Sat, Aug 28 2004, William Lee Irwin III wrote:
>> It certainly appears to be the deciding factor from the thread.
On Sun, Aug 29, 2004 at 06:54:59PM +0200, Jens Axboe wrote:
> Has nothing to do with the io scheduler itself, apart from the fact that
> CFQ exposes the problem by setting a larger q->nr_requests. And that is
> the very deciding factor, not the io scheduler.
Then it's narrower still, q->nr_requests. What a priori reasons are
there for this to vomit? clear_queue_congested() seems to be called
only when a request is retired, so a large number of requests in flight
may be doing something unexpected, and I'd expect large q->nr_requests
to keep large numbers of requests around. Hmm...
-- wli
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next prev parent reply other threads:[~2004-08-29 17:52 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
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 [this message]
2004-08-28 21:59 ` Karl Vogel
2004-08-29 16:53 ` Jens Axboe
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