Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 14 Feb 2003 04:35:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 14 Feb 2003 04:34:40 -0500 Received: from noodles.codemonkey.org.uk ([213.152.47.19]:32421 "EHLO noodles.internal") by vger.kernel.org with ESMTP id ; Fri, 14 Feb 2003 04:33:38 -0500 Date: Fri, 14 Feb 2003 09:38:56 +0000 From: Dave Jones To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: 2.5.60-mm2 Message-ID: <20030214093856.GC13845@codemonkey.org.uk> Mail-Followup-To: Dave Jones , Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20030214013144.2d94a9c5.akpm@digeo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030214013144.2d94a9c5.akpm@digeo.com> User-Agent: Mutt/1.5.3i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1065 Lines: 27 On Fri, Feb 14, 2003 at 01:31:44AM -0800, Andrew Morton wrote: > . Considerable poking at the NFS MAP_SHARED OOM lockup. It is limping > along now, but writeout bandwidth is poor and it is still struggling. > Needs work. > > . There's a one-liner which removes an O(n^2) search in the NFS writeback > path. It increases writeout bandwidth by 4x and decreases CPU load from > 100% to 3%. Needs work. I'm puzzled that you've had NFS stable enough to test these. How much testing has this stuff had? Here 2.5.60+bk clients fall over under moderate NFS load. (And go splat quickly under high load). Trying to run things like dbench causes lockups, fsx/fstress made it reboot, plus the odd 'cheating' errors reported yesterday. Dave -- | Dave Jones. http://www.codemonkey.org.uk | SuSE Labs - 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/