From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andrew Walrond <andrew@walrond.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.13-mm3
Date: Tue, 13 Sep 2005 00:26:42 +1000 [thread overview]
Message-ID: <43259022.3030603@yahoo.com.au> (raw)
In-Reply-To: <200509121517.31562.andrew@walrond.org>
Andrew Walrond wrote:
> On Monday 12 September 2005 10:43, Andrew Morton wrote:
>
>
>> - An update to the anticipatory scheduler to fix a performance problem
>> where processes do a single read then exit, in the presence of
>>competing I/O acticity.
>
>
> Is there more discussion on this somewhere? When was the problem introduced?
> Bit of a long shot, but it fits the description of some problems I have
> noticed recently.
>
It has been quite a while coming. The problem has been there for a long
time, but there is no "regression" that would not exist in eg. deadline
scheduler.
Basically it used to "miss" opportunities to do read anticipation where it
should pay off, and now it misses less.
A description of / pointer to your problems would be interesting.
Nick
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2005-09-12 14:26 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-12 9:43 2.6.13-mm3 Andrew Morton
2005-09-12 11:47 ` 2.6.13-mm3 Michal Piotrowski
2005-09-12 11:48 ` 2.6.13-mm3 [OOPS] vfs, page_owner, full reproductively, badness in vsnprintf Michal Piotrowski
2005-09-12 17:54 ` Alexander Nyberg
2005-09-12 18:48 ` Ingo Oeser
2005-09-12 21:13 ` Michal Piotrowski
2005-09-12 22:44 ` Andrew Morton
2005-09-12 22:56 ` Michal Piotrowski
2005-09-12 23:16 ` Andrew Morton
2005-09-12 13:15 ` 2.6.13-mm3 Reuben Farrelly
2005-09-12 14:17 ` 2.6.13-mm3 BUG in ntfs or slab Jiri Slaby
2005-09-12 14:21 ` Jiri Slaby
2005-09-12 14:45 ` Anton Altaparmakov
2005-09-12 14:17 ` 2.6.13-mm3 Andrew Walrond
2005-09-12 14:26 ` Nick Piggin [this message]
2005-09-12 14:54 ` 2.6.13-mm3 Sonny Rao
2005-09-12 19:56 ` 2.6.13-mm3 Andrew Morton
2005-09-12 20:09 ` 2.6.13-mm3 Sonny Rao
2005-09-12 20:55 ` 2.6.13-mm3 Andrew Morton
2005-09-12 21:03 ` 2.6.13-mm3 Danny ter Haar
2005-09-12 22:06 ` 2.6.13-mm3 Sonny Rao
2005-09-12 22:47 ` 2.6.13-mm3 Martin J. Bligh
2005-09-13 5:19 ` 2.6.13-mm3 Danny ter Haar
2005-09-13 6:35 ` 2.6.13-mm3 Sonny Rao
2005-09-13 5:14 ` 2.6.13-mm3 Danny ter Haar
2005-09-13 7:02 ` 2.6.13-mm3 Sonny Rao
2005-09-13 14:31 ` 2.6.13-mm3 Martin J. Bligh
2005-09-13 18:32 ` 2.6.13-mm3 Sonny Rao
2005-09-13 18:46 ` 2.6.13-mm3 Sonny Rao
2005-09-12 15:19 ` 2.6.13-mm3 Paolo Ciarrocchi
2005-09-12 20:13 ` 2.6.13-mm3 Nish Aravamudan
2005-09-12 21:04 ` 2.6.13-mm3 Paolo Ciarrocchi
2005-09-12 21:07 ` 2.6.13-mm3 Nish Aravamudan
2005-09-12 22:50 ` 2.6.13-mm3 Martin J. Bligh
2005-09-12 19:40 ` 2.6.13-mm3 Sonny Rao
[not found] ` <200509122106.j8CL6WPk006092@wscnet.wsc.cz>
2005-09-12 21:49 ` 2.6.13-mm3 Sonny Rao
2005-09-12 22:10 ` 2.6.13-mm3 Sonny Rao
2005-09-13 0:51 ` 2.6.13-mm3 Jiri Slaby
2005-09-13 5:58 ` 2.6.13-mm3 Sonny Rao
[not found] ` <20050912222437.GA13124@sergelap.austin.ibm.com>
2005-09-12 23:10 ` ibmvscsi badness (Re: 2.6.13-mm3) Andrew Morton
2005-09-13 1:38 ` Anton Blanchard
2005-09-13 8:56 ` serue
2005-09-13 15:09 ` [Patch] ibmvscsi compatibility fix Dave C Boutcher
2005-09-13 15:18 ` James Bottomley
2005-09-13 18:10 ` Serge E. Hallyn
2005-09-13 19:16 ` Serge E. Hallyn
2005-09-13 4:04 ` ibmvscsi badness (Re: 2.6.13-mm3) Anton Blanchard
2005-09-13 5:10 ` Dave C Boutcher
2005-09-18 0:38 ` Benjamin Herrenschmidt
2005-09-13 0:02 ` drivers/usb/class/bluetty.c does NOT build Lion Vollnhals
2005-09-13 0:10 ` Andrew Morton
2005-09-13 0:34 ` [PATCH] usb: bluetty fix old tty buffer using Jiri Slaby
2005-09-15 18:58 ` 2.6.13-mm3 (general protection fault) Dominik Karall
2005-09-15 19:34 ` Andrew Morton
2005-09-15 19:36 ` Andrew Morton
2006-01-14 17:39 ` 2.6.13-mm3 Matthias Urlichs
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