From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 14 Feb 2003 09:38:56 +0000 From: Dave Jones Subject: Re: 2.5.60-mm2 Message-ID: <20030214093856.GC13845@codemonkey.org.uk> 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> Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org