Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755196AbZDDWWV (ORCPT ); Sat, 4 Apr 2009 18:22:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752657AbZDDWWG (ORCPT ); Sat, 4 Apr 2009 18:22:06 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:45476 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752607AbZDDWWE (ORCPT ); Sat, 4 Apr 2009 18:22:04 -0400 Date: Sat, 4 Apr 2009 15:19:19 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Theodore Tso cc: Jens Axboe , Linux Kernel Developers List , Ext4 Developers List Subject: Re: [GIT PULL] Ext3 latency fixes In-Reply-To: Message-ID: References: <1238742067-30814-1-git-send-email-tytso@mit.edu> <20090404135719.GA9812@mit.edu> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 998 Lines: 24 On Sat, 4 Apr 2009, Linus Torvalds wrote: > > Hmm. I can certainly see a very noticeable improvement. .. and btw, just to put that into perspective - I ended up running with that repeated 'dd+sync+rm' in the background for quite a while, and the machine was in no way unusable. I don't think I saw a single "ooh, that feels really dead" case with anticipatory, although I saw several "bad stutter" cases. Of course, with the whole "overwrite" case, things are really much smoother, and I can hardly notice anything happening at all. Although I _do_ get an occasional 200-600ms fsync hickup, and I can tell those very clearly. But if that was the worst I'd ever see, I'd be a very happy person. It's a good goal to have, I suspect. Linus -- 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/