Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763820AbZCYSAh (ORCPT ); Wed, 25 Mar 2009 14:00:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762876AbZCYSAE (ORCPT ); Wed, 25 Mar 2009 14:00:04 -0400 Received: from wf-out-1314.google.com ([209.85.200.173]:44824 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762803AbZCYSAA convert rfc822-to-8bit (ORCPT ); Wed, 25 Mar 2009 14:00:00 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=Q/3v7/1KOdhc7DGARZB6e+ih27m3yWxVqZBJCMpk4S0tdhxkRSmdybe/yzQ52NNooW ig5kMPLjly1QMa7piBq3iFbRmJDuTjyKyLj+IjmaaHZLrN7fQxVRyGSMFKU4SLZmUxVq KMMfcNoza2oFp/YU9yXkg16tEsa/Ra2rFc+is= MIME-Version: 1.0 In-Reply-To: <20090324170559.1667c847@infradead.org> References: <49C87B87.4020108@krogh.cc> <72dbd3150903232346g5af126d7sb5ad4949a7b5041f@mail.gmail.com> <20090324091545.758d00f5@lxorguk.ukuu.org.uk> <20090324093245.GA22483@elte.hu> <20090324101011.6555a0b9@lxorguk.ukuu.org.uk> <20090324103111.GA26691@elte.hu> <20090324132032.GK5814@mit.edu> <20090324160353.06a4a5ed@hobbes.virtuouswap> <20090324170559.1667c847@infradead.org> Date: Wed, 25 Mar 2009 10:59:57 -0700 Message-ID: <72dbd3150903251059xc1fbc04qb1335e33bb0a2732@mail.gmail.com> Subject: Re: Linux 2.6.29 From: David Rees To: Arjan van de Ven Cc: Jesse Barnes , Theodore Tso , Ingo Molnar , Alan Cox , Andrew Morton , Peter Zijlstra , Nick Piggin , Jens Axboe , Jesper Krogh , Linus Torvalds , Linux Kernel Mailing List Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1186 Lines: 25 On Tue, Mar 24, 2009 at 5:05 PM, Arjan van de Ven wrote: > On Tue, 24 Mar 2009 16:03:53 -0700 > Jesse Barnes wrote: >> I remember early in the 2.6.x days there was a lot of focus on making >> interactive performance good, and for a long time it was. ?But this >> I/O problem has been around for a *long* time now... What happened? >> Do not many people run into this daily? ?Do all the filesystem >> hackers run with special mount options to mitigate the problem? > > the people that care use my kernel patch on ext3 ;-) > (or the userland equivalent tweak in /etc/rc.local) There's a couple of comments in bug 12309 [1] which confirm that increasing the priority of kjournald reduces latency significantly since I posted your tweak there yesterday. I hope to do some testing today on my systems to see if it helps on them, too. -Dave [1] http://bugzilla.kernel.org/show_bug.cgi?id=12309 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/