Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261890AbVDKTQR (ORCPT ); Mon, 11 Apr 2005 15:16:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261887AbVDKTQR (ORCPT ); Mon, 11 Apr 2005 15:16:17 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:48874 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S261890AbVDKTMy (ORCPT ); Mon, 11 Apr 2005 15:12:54 -0400 Subject: Re: ext3 allocate-with-reservation latencies From: Lee Revell To: cmm@us.ibm.com Cc: "Stephen C. Tweedie" , Ingo Molnar , linux-kernel , Andrew Morton In-Reply-To: <1113244710.4413.38.camel@localhost.localdomain> References: <1112673094.14322.10.camel@mindpipe> <20050405041359.GA17265@elte.hu> <1112765751.3874.14.camel@localhost.localdomain> <20050407081434.GA28008@elte.hu> <1112879303.2859.78.camel@sisko.sctweedie.blueyonder.co.uk> <1112917023.3787.75.camel@dyn318043bld.beaverton.ibm.com> <1112971236.1975.104.camel@sisko.sctweedie.blueyonder.co.uk> <1112983801.10605.32.camel@dyn318043bld.beaverton.ibm.com> <1113220089.2164.52.camel@sisko.sctweedie.blueyonder.co.uk> <1113244710.4413.38.camel@localhost.localdomain> Content-Type: text/plain Date: Mon, 11 Apr 2005 15:12:50 -0400 Message-Id: <1113246771.32686.4.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.2.1.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 757 Lines: 21 On Mon, 2005-04-11 at 11:38 -0700, Mingming Cao wrote: > I will work on a patch for Lee to try sometime tonight. > Just FYI, this will take a while to test, because this latency seems quite rare. I haven't seen it again since my original report. Hopefully I can reproduce it with enough dbench processes. This seems to agree with your earlier observation that we seem to have been quite unlucky. Anyway, if I understand the thread it seems like this could increase performance as well as help latency. Lee - 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/