From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ed Tomlinson Subject: Re: 2.5.68-mm2 Date: Wed, 23 Apr 2003 08:08:25 -0400 References: <20030423012046.0535e4fd.akpm@digeo.com> In-Reply-To: <20030423012046.0535e4fd.akpm@digeo.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Message-Id: <200304230808.25387.tomlins@cam.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton , linux-mm@kvack.org List-ID: On April 23, 2003 04:20 am, Andrew Morton wrote: > . I got tired of the objrmap code going BUG under stress, so it is now in > disgrace in the experimental/ directory. As far as I see it there are two problems that objrmap/shpte/pgcl try to solve. One is low memory pte useage, the second being to reduce the rmap fork overhead. objrmap helps in both cases but has problem with truncate and intoduces a O(n^2) search into the the vm. shpte helps a lot with the first problem, and does not seem to do much for the second. If I remember correctly it could also be a config option. pgcl should help with both to some extent but is not ready for prime time - yet. >>From comments recently made on lkml I believe that the first problem is probably more pressing. What problems need to be resolved with each patch? Ed Tomlinson -- 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