From: mingming cao <cmm@us.ibm.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jean-Eric Cuendet <jean-eric.cuendet@linkvest.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Rework of /proc/stat
Date: Wed, 06 Mar 2002 17:13:20 -0800 [thread overview]
Message-ID: <3C86BEB0.4090203@us.ibm.com> (raw)
In-Reply-To: <3C86553E.3070608@linkvest.com> <E16ik6y-0008Qf-00@the-village.bc.nu>
Alan Cox wrote:
>>I've made a new version of IO statistics in kstat that remove the
>>previous limitations of MAX_MAJOR. I've made tests on my machine only, so could someone test it, please?
>>Feedback welcome.
>>
>
> Any reason for preferring this over the sard patches in -ac ?
>
Basically, statistic data are moved from the global kstat structure to
the request_queue structures, and it is allocated/freed when the request
queue is initialized and freed. This way it is
1)self-controlled;
2)avoid the lookup step before the accounting, so it should be faster;
3)statistics implementation is not affected by the major/minor numbers;
4)able to gathering statistics for all disks while keep the memory needs
minimized.
next prev parent reply other threads:[~2002-03-07 1:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-06 17:43 [PATCH] Rework of /proc/stat Jean-Eric Cuendet
2002-03-06 20:08 ` James Stevenson
2002-03-06 22:42 ` Alan Cox
2002-03-07 1:13 ` mingming cao [this message]
2002-03-07 11:16 ` Jean-Eric Cuendet
2002-03-07 11:48 ` Christoph Hellwig
2002-03-07 13:50 ` Alan Cox
2002-03-07 13:53 ` Jean-Eric Cuendet
2002-03-07 14:17 ` Alan Cox
2002-03-07 11:11 ` Jean-Eric Cuendet
2002-03-07 11:48 ` Arjan van de Ven
2002-03-07 12:48 ` Alan Cox
2002-03-07 11:40 ` Jean-Eric Cuendet
2002-03-07 12:51 ` Alan Cox
[not found] <E16lBe4-0006ly-00@the-village.bc.nu>
2002-03-13 16:41 ` Jean-Eric Cuendet
-- strict thread matches above, loose matches on Subject: below --
2002-03-06 17:16 Jean-Eric Cuendet
2002-03-06 17:25 ` Russell King
2002-03-06 19:48 ` Dominik Kubla
2002-03-07 11:12 ` Jean-Eric Cuendet
2002-03-07 1:07 ` mingming cao
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