From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jon Nelson" Subject: Re: Awful Raid10,f2 performance Date: Tue, 16 Dec 2008 09:53:39 -0600 Message-ID: References: <48440953.3040004@wpkg.org> <18758.52823.375213.963854@notabene.brown> <20081216040349.GA15389@rap.rap.dk> <20081216101020.GA17410@rap.rap.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: =?ISO-8859-1?Q?Keld_J=F8rn_Simonsen?= Cc: Neil Brown , Linux-Raid List-Id: linux-raid.ids On Tue, Dec 16, 2008 at 9:26 AM, Jon Nelson wrote: > On Tue, Dec 16, 2008 at 4:10 AM, Keld J=F8rn Simonsen = wrote: >> On Mon, Dec 15, 2008 at 10:28:30PM -0600, Jon Nelson wrote: >>> On Mon, Dec 15, 2008 at 10:03 PM, Keld J=F8rn Simonsen wrote: >>> >>> > there was a pach to speed up raid10,f2 check in a recent kernel, >>> > something like 2.6.27. It did improve thruput from something >>> > like 40 % to about 90 %. What kernel are you using? >>> >>> 2.6.25.18-0.2-default >> >> I believe the patch arrived in a later kernel. If you can try it out >> with a vanilla kernel and report, I think it would be quite interest= ing. > > I'm pretty sure I did try it out and did have an improvement. > However, thanks to the power of the openSUSE build service, I am goin= g > to build a kernel just now, if I can. Scratch that. I decided to just do this at home. The suse kernel 2.6.25.18-0.2 appears to have this patch already. Thus, I've been running with this patch. --=20 Jon -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html