Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261896AbTHZR1R (ORCPT ); Tue, 26 Aug 2003 13:27:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261679AbTHZR1R (ORCPT ); Tue, 26 Aug 2003 13:27:17 -0400 Received: from fw.osdl.org ([65.172.181.6]:58071 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S261896AbTHZR1O (ORCPT ); Tue, 26 Aug 2003 13:27:14 -0400 Date: Tue, 26 Aug 2003 10:29:31 -0700 From: Andrew Morton To: William Lee Irwin III Cc: mulix@mulix.org, arjanv@redhat.com, mingo@redhat.com, rusty@rustcorp.com.au, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] Futex non-page-pinning fix Message-Id: <20030826102931.28ecb5aa.akpm@osdl.org> In-Reply-To: <20030826104535.GR4306@holomorphy.com> References: <20030825231449.7de28ba6.akpm@osdl.org> <20030826000218.2ceaea1d.akpm@osdl.org> <1061884611.2982.4.camel@laptop.fenrus.com> <20030826080759.GK13390@actcom.co.il> <20030826103833.GX1715@holomorphy.com> <20030826034458.35c54fbf.akpm@osdl.org> <20030826104535.GR4306@holomorphy.com> X-Mailer: Sylpheed version 0.9.4 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 956 Lines: 27 William Lee Irwin III wrote: > > William Lee Irwin III wrote: > >> except you have the usual intractable disaster > >> whenever file-backed pages are anonymized via truncate(). > > On Tue, Aug 26, 2003 at 03:44:58AM -0700, Andrew Morton wrote: > > They only arose due to races between major faults and truncate. > > That got fixed. > > Then it sounds relatively easy to localize the search structure (if you > care to do so), The "group of all processes which could potentially (or really do) share a chunk of anon memory" thing sounds tricky. > apart from a policy decision about what on earth to do > about waiters on truncated futexes. erk, screwed. - 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/