From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3D766A79.D1975DCA@zip.com.au> Date: Wed, 04 Sep 2002 13:18:01 -0700 From: Andrew Morton MIME-Version: 1.0 Subject: Re: 2.5.33-mm1 References: <200209032251.54795.tomlins@cam.org> <3D757F11.B72BB708@zip.com.au> <20020904202523.A15699@redhat.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "Stephen C. Tweedie" Cc: Ed Tomlinson , William Lee Irwin III , lkml , "linux-mm@kvack.org" List-ID: "Stephen C. Tweedie" wrote: > > Hi, > > On Tue, Sep 03, 2002 at 08:33:37PM -0700, Andrew Morton wrote: > > > I *really* think we need to throw away those pages instantly. > > > > The only possible reason for hanging onto them is because they're > > cache-warm. And we need a global-scope cpu-local hot pages queue > > anyway. > > Yep --- except for caches with constructors, for which we do save a > bit more by hanging onto the pages for longer. Ah, of course. Thanks. We'll still have a significant volume of pre-constructed objects in the partially-full slabs: it seems that these things are fairly prone to internal fragmentation, which works to our advantage in this case. So yes, perhaps we need to hang onto some preconstructed pages for these slabs, if the internal fragmentation of the existing part-filled slabs is low. -- 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/