From: Andrew Morton <akpm@zip.com.au>
To: Jens Axboe <axboe@suse.de>
Cc: Rik van Riel <riel@conectiva.com.br>,
William Lee Irwin III <wli@holomorphy.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [patch] get_request starvation fix
Date: Fri, 08 Feb 2002 01:57:34 -0800 [thread overview]
Message-ID: <3C63A10E.D5DF604A@zip.com.au> (raw)
In-Reply-To: <3C639060.A68A42CA@zip.com.au>, <3C639060.A68A42CA@zip.com.au> <20020208095739.J4942@suse.de>
Jens Axboe wrote:
>
> On Fri, Feb 08 2002, Andrew Morton wrote:
> > Here's a patch which addresses the get_request starvation problem.
>
> [snip]
>
> Agrh, if only I knew you were working on this too :/. Oh well, from a
> first-read the patch looks good.
Seems that with FIFO fairness, /bin/sync now also livelocks. And
it's pretty easy to see why. There's nothing to make
write_unlocked_buffers() terminate.
We'll worry about that tomorrow. I may just make it give up
after writing (2 * nr_buffers_type[BUF_DIRTY]) buffers.
The patch works well with read-latency2 (and it didn't throw
rejects). Smooth and fast. It's going to take some time and
testing to settle everything in.
-
next prev parent reply other threads:[~2002-02-08 9:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-08 8:46 [patch] get_request starvation fix Andrew Morton
2002-02-08 8:57 ` Jens Axboe
2002-02-08 9:57 ` Andrew Morton [this message]
2002-02-08 9:10 ` Andrew Morton
2002-02-08 11:37 ` Rik van Riel
2002-02-08 18:28 ` Andrew Morton
2002-02-11 9:41 ` Andrew Morton
2002-02-11 17:35 ` Suparna Bhattacharya
2002-02-11 19:26 ` Andrew Morton
2002-02-14 6:00 ` Suparna Bhattacharya
2002-02-13 0:33 ` Jesse Barnes
-- strict thread matches above, loose matches on Subject: below --
2002-02-08 19:31 Dieter Nützel
[not found] <200202081932.GAA05943@mangalore.zipworld.com.au>
2002-02-08 19:44 ` Andrew Morton
2002-02-08 19:53 ` Dieter Nützel
2002-02-08 20:43 ` Rik van Riel
2002-02-09 1:56 rwhron
2002-02-12 23:13 Andrew Morton
2002-02-13 1:28 ` William Lee Irwin III
2002-02-15 17:23 ` Marcelo Tosatti
2002-02-16 7:32 ` Andrew Morton
2002-02-16 10:13 ` Daniel Phillips
2002-02-16 10:25 ` Andrew Morton
2002-02-13 13:55 rwhron
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