Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 30 Jul 2002 06:13:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Jul 2002 06:13:56 -0400 Received: from dsl-213-023-043-226.arcor-ip.net ([213.23.43.226]:3996 "EHLO starship") by vger.kernel.org with ESMTP id ; Tue, 30 Jul 2002 06:13:56 -0400 Content-Type: text/plain; charset=US-ASCII From: Daniel Phillips To: Andrew Morton Subject: Re: [patch 1/13] misc fixes Date: Tue, 30 Jul 2002 12:18:33 +0200 X-Mailer: KMail [version 1.3.2] Cc: lkml References: <3D439E09.3348E8D6@zip.com.au> <3D459ECE.C5BD53DE@zip.com.au> In-Reply-To: <3D459ECE.C5BD53DE@zip.com.au> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 968 Lines: 23 On Monday 29 July 2002 22:00, Andrew Morton wrote: > > For this to work, anon pages will need to have something in page->index. > > This isn't too much of a challenge. A reasonable value to put in there is > > the creator's virtual address, shifted right, and perhaps mangled a little to > > reduce contention. > > Well you want the likely-to-be-temporally-adjacent anon pages to > use the same lock. So maybe > > page->index = some_global_int++; Actually, thinking again... the nice thing about this scheme is the opportunity to take the lock once for a whole batch of add_rmaps while walking through a page table, and the same for remove_rmap. So it definitely wants to be based on the virtual address. -- Daniel - 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/