Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265285AbTIDQxz (ORCPT ); Thu, 4 Sep 2003 12:53:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265291AbTIDQxy (ORCPT ); Thu, 4 Sep 2003 12:53:54 -0400 Received: from bay-bridge.veritas.com ([143.127.3.10]:19647 "EHLO mtvmime01.veritas.com") by vger.kernel.org with ESMTP id S265285AbTIDQxv (ORCPT ); Thu, 4 Sep 2003 12:53:51 -0400 Date: Thu, 4 Sep 2003 17:55:31 +0100 (BST) From: Hugh Dickins X-X-Sender: hugh@localhost.localdomain To: Linus Torvalds cc: Rusty Russell , Jamie Lokier , Andrew Morton , Ingo Molnar , Subject: Re: [PATCH] Alternate futex non-page-pinning and COW fix In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 666 Lines: 17 On Thu, 4 Sep 2003, Linus Torvalds wrote: > > However, the thing is, the case really can be a totally writable > MAP_PRIVATE that just hasn't been modified (and thus not COW'ed) _yet_. > > But sure, we could just require that futex pages are dirty in this case. There's no problem here in Jamie's implementation, no need to demand that; but the previous implementation did make COWing problems for itself, yes. Hugh - 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/