From: "Keld Jørn Simonsen" <keld@dkuug.dk>
To: Jon Nelson <jnelson-linux-raid@jamponi.net>
Cc: LinuxRaid <linux-raid@vger.kernel.org>
Subject: Re: Q: Is this how 'check' works (on raid10 in particular)?
Date: Tue, 5 Aug 2008 12:17:40 +0200 [thread overview]
Message-ID: <20080805101740.GB14670@rap.rap.dk> (raw)
In-Reply-To: <cccedfc60808041836s37637ff2x3d65543ab7d3d105@mail.gmail.com>
On Mon, Aug 04, 2008 at 08:36:33PM -0500, Jon Nelson wrote:
> The patch Keld sent me makes a significant difference:
>
> Before:
> (Stock 2.6.25.11 x86-64 openSUSE 11.0 kernel raid10 module): 4.5h to 5.5h
>
> After:
> Same kernel, minor changes to raid10.c and compiled: 1h 56m.
>
> ::
>
> Aug 4 18:37:09 turnip kernel: md: data-check of RAID array md0
> Aug 4 20:33:24 turnip kernel: md: md0: data-check done.
>
>
> > My idea is to do the checks in bigger blocks, then you would minimize
> > the trashing, by minimizing the number of times you need to move the
> > head. And this would not need much change in the code. I have done a
> > patch to do this, but I have not yet tested it.
Thanks for testing it. It sounds good, and as I expected it to behave.
I think the patch is clean and I have sent it to the list and Neil for
inclusion in the tree.
Best regards
keld
prev parent reply other threads:[~2008-08-05 10:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-03 12:32 Q: Is this how 'check' works (on raid10 in particular)? Jon Nelson
2008-08-03 12:54 ` Keld Jørn Simonsen
2008-08-03 13:28 ` Keld Jørn Simonsen
2008-08-05 1:36 ` Jon Nelson
2008-08-05 10:17 ` Keld Jørn Simonsen [this message]
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