Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933705AbXFFALQ (ORCPT ); Tue, 5 Jun 2007 20:11:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1765730AbXFFALE (ORCPT ); Tue, 5 Jun 2007 20:11:04 -0400 Received: from x35.xmailserver.org ([64.71.152.41]:3561 "EHLO x35.xmailserver.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763761AbXFFALD (ORCPT ); Tue, 5 Jun 2007 20:11:03 -0400 X-AuthUser: davidel@xmailserver.org Date: Tue, 5 Jun 2007 17:11:01 -0700 (PDT) From: Davide Libenzi X-X-Sender: davide@alien.or.mcafeemobile.com To: Nicholas Miell cc: Benjamin Herrenschmidt , Linus Torvalds , Linux Kernel list , Andrew Morton , Paul Mackerras Subject: Re: [PATCH/RFC] signal races/bugs, losing TIF_SIGPENDING and other woes In-Reply-To: <1181087462.2788.8.camel@entropy> Message-ID: References: <1181006711.31677.97.camel@localhost.localdomain> <1181009413.31677.117.camel@localhost.localdomain> <1181013756.31677.123.camel@localhost.localdomain> <1181023787.2785.14.camel@entropy> <1181028453.31677.127.camel@localhost.localdomain> <1181087462.2788.8.camel@entropy> X-GPG-FINGRPRINT: CFAE 5BEE FD36 F65E E640 56FE 0974 BF23 270F 474E X-GPG-PUBLIC_KEY: http://www.xmailserver.org/davidel.asc 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: 902 Lines: 26 On Tue, 5 Jun 2007, Nicholas Miell wrote: > Yes, that's certainly wrong, but that's an implementation issue. I was > more concerned about the design of the API. > > Naively, I would expect a reads on a signalfd to return either process > signals or thread signals targeted towards the thread doing the read. > > What it actually does (delivering process signals or thread signals > targeted towards the thread that created the signalfd) is weird. > > For one, it means you can't create a single signalfd, stick it in an > epoll set, and then wait on that set from multiple threads. In your box threads do share the sighand, don't they? :) - Davide - 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/