LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "yunfeng zhang" <zyf.zeroos@gmail.com>
To: "Rik van Riel" <riel@redhat.com>
Cc: linux-kernel@vger.kernel.org, "Hugh Dickins" <hugh@veritas.com>,
	linux-mm@kvack.org
Subject: Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem
Date: Fri, 23 Feb 2007 10:31:13 +0800	[thread overview]
Message-ID: <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> (raw)
In-Reply-To: <45DCFDBE.50209@redhat.com>

Performance improvement should occur when private pages of multiple processes
are messed up, such as SMP. To UP, my previous mail is done by timer, which only
shows a fact, if pages are messed up fully, current readahead will degrade
remarkably, and unused readaheading pages make a burden to memory subsystem.

You should re-test your testcases following the advises on Linux without my
patch, do normal testcases and select a testcase randomly and record
'/proc/vmstat/pswpin', redo the testcase solely, if the results are close, that
is, your testcases doesn't messed up private pages at all as you expected due to
Linux schedule. Thank you!


2007/2/22, Rik van Riel <riel@redhat.com>:
> yunfeng zhang wrote:
> > Any comments or suggestions are always welcomed.
>
> Same question as always: what problem are you trying to solve?

  reply	other threads:[~2007-02-23  2:31 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-22  7:09 yunfeng zhang
2007-01-22 10:21 ` Pavel Machek
2007-01-22 20:00 ` Al Boldi
2007-01-23  4:21   ` yunfeng zhang
2007-01-23  5:08     ` yunfeng zhang
2007-01-24 21:15       ` Hugh Dickins
2007-01-26  4:58         ` yunfeng zhang
2007-01-29  5:29         ` yunfeng zhang
     [not found]         ` <4df04b840701301852i41687edfl1462c4ca3344431c@mail.gmail.com>
     [not found]           ` <Pine.LNX.4.64.0701312022340.26857@blonde.wat.veritas.com>
2007-02-13  5:52             ` yunfeng zhang
2007-02-20  9:06               ` yunfeng zhang
2007-02-22  1:58                 ` yunfeng zhang
2007-02-22  2:19                   ` Rik van Riel
2007-02-23  2:31                     ` yunfeng zhang [this message]
2007-02-23  3:33                       ` Rik van Riel
2007-02-25  1:47                         ` yunfeng zhang
2007-08-23  9:47                           ` yunfeng zhang
2007-08-23 15:56                             ` Randy Dunlap

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com \
    --to=zyf.zeroos@gmail.com \
    --cc=hugh@veritas.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=riel@redhat.com \
    --subject='Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).