Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755263AbZAJSYT (ORCPT ); Sat, 10 Jan 2009 13:24:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752865AbZAJSYL (ORCPT ); Sat, 10 Jan 2009 13:24:11 -0500 Received: from mx2.redhat.com ([66.187.237.31]:45750 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752543AbZAJSYK (ORCPT ); Sat, 10 Jan 2009 13:24:10 -0500 Date: Sat, 10 Jan 2009 19:21:55 +0100 From: Oleg Nesterov To: Scott James Remnant Cc: Casey Dahlin , Roland McGrath , Ulrich Drepper , Ingo Molnar , Linux Kernel , Randy Dunlap , Davide Libenzi , Peter Zijlstra Subject: Re: [RESEND][RFC PATCH v2] waitfd Message-ID: <20090110182155.GA17516@redhat.com> References: <20090107123457.GB16268@elte.hu> <20090107205322.5F8C7FC3E0@magilla.sf.frob.com> <20090108143220.GA8717@redhat.com> <20090108193530.99D74FC3DD@magilla.sf.frob.com> <496663B6.3090709@redhat.com> <20090108213901.GA26729@redhat.com> <1231599141.11642.58.camel@quest> <20090110161911.GB10954@redhat.com> <1231607398.11642.104.camel@quest> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1231607398.11642.104.camel@quest> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 896 Lines: 25 On 01/10, Scott James Remnant wrote: > > On Sat, 2009-01-10 at 17:19 +0100, Oleg Nesterov wrote: > > > I am not sure we are talking about the same thing, but afaics poll() + > > signalfd can work to (say) reap the childs. Actually, ppoll() alone is > > enough. > > > Last time I checked, ppoll() was not actually implemented across all > architectures in a manner that solved the race it was intended to solve. > As I said, this is imho unfair. But I mentioned ppol() "just in case". My questiong was why do you think that "signalfd() can't currently be made to work in the way you describe". You have dropped this part to change the topic? Oleg. -- 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/