From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: New RAID-6 snapshot Date: Tue, 30 Dec 2003 10:35:53 -0800 Sender: linux-raid-owner@vger.kernel.org Message-ID: <3FF1C589.3070906@zytor.com> References: <20031230172420.GS1882@matchmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20031230172420.GS1882@matchmail.com> To: Mike Fedyk Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Mike Fedyk wrote: > On Tue, Dec 30, 2003 at 03:34:28AM -0800, H. Peter Anvin wrote: > >>Well, I implemented read-modify-write for RAID-6, and at least on my >>6-disk system it was a small but measurable performance *loss*. > > What was your previous patch doing instead? The published snapshots (including the latest, since I backed out read-modify-write) all do read-reconstruct-write. -hpa