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?
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next prev parent reply other threads:[~2007-02-23 2:31 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4df04b840701212309l2a283357jbdaa88794e5208a7@mail.gmail.com>
[not found] ` <200701222300.41960.a1426z@gawab.com>
[not found] ` <4df04b840701222021w5e1aaab2if2ba7fc38d06d64b@mail.gmail.com>
[not found] ` <4df04b840701222108o6992933bied5fff8a525413@mail.gmail.com>
[not found] ` <Pine.LNX.4.64.0701242015090.1770@blonde.wat.veritas.com>
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
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