From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 21 Sep 2002 16:31:51 -0700 From: "Martin J. Bligh" Reply-To: "Martin J. Bligh" Subject: Re: overcommit stuff Message-ID: <14599773.1032625910@[10.10.2.3]> In-Reply-To: <3D8D0046.EF119E03@digeo.com> References: <3D8D0046.EF119E03@digeo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton , Alan Cox Cc: "linux-mm@kvack.org" List-ID: > running 10,000 tiobench threads I'm showing 23 gigs of > `Commited_AS'. Is this right? Those pages are shared, > and if they're not PROT_WRITEable then there's no way in > which they can become unshared? Seems to be excessively > pessimistic? > > Or is 2.5 not up to date? It's also a global atomic counter that burns up a fair amount of CPU time bouncing cachelines on the NUMA boxes ... even when overcommit is set to 1, and it's not used for anything other than meminfo ... any chance of this either becoming a per-cpu thing, or dying, or not being used when overcommit is 1? M. -- 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/