From: "H. Peter Anvin" <hpa@zytor.com>
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: New RAID-6 snapshot
Date: Tue, 30 Dec 2003 11:22:42 -0800 [thread overview]
Message-ID: <3FF1D082.6040007@zytor.com> (raw)
In-Reply-To: <20031230185835.GV1882@matchmail.com>
Mike Fedyk wrote:
>
> You mentioned that none of your snapshots have RMW in them. Can you put up
> a patch that adds RMW to the snapshots? Maybe someone will notice
> something...
>
It would take considerable amounts of work to get it into releasable
shape, because I'd have to add RMW functionality to all the implemented
algorithms -- not just the one my machine uses. However, if someone is
interested in vgrepping through the source I can post the part of the
diff patch that applies to raid6main.c.
I doubt it's actually wrong, though. It probably just causes worse
access patterns in my particular configuration.
> Did you get any data corruption with the RMW patch applied?
>
No.
-hpa
prev parent reply other threads:[~2003-12-30 19:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-30 11:34 New RAID-6 snapshot H. Peter Anvin
2003-12-30 17:24 ` Mike Fedyk
2003-12-30 18:35 ` H. Peter Anvin
2003-12-30 18:43 ` Mike Fedyk
2003-12-30 18:51 ` H. Peter Anvin
2003-12-30 18:58 ` Mike Fedyk
2003-12-30 19:22 ` H. Peter Anvin [this message]
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