Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752520AbaBMRkX (ORCPT ); Thu, 13 Feb 2014 12:40:23 -0500 Received: from mx1.redhat.com ([209.132.183.28]:44011 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751799AbaBMRkV (ORCPT ); Thu, 13 Feb 2014 12:40:21 -0500 Date: Thu, 13 Feb 2014 18:40:20 +0100 From: Oleg Nesterov To: Linus Torvalds Cc: Al Viro , Dave Chinner , Dave Jones , Eric Sandeen , Linux Kernel , xfs@oss.sgi.com Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled. Message-ID: <20140213174020.GA14455@redhat.com> References: <20140212010941.GM18016@ZenIV.linux.org.uk> <20140212040358.GA25327@redhat.com> <20140212042215.GN18016@ZenIV.linux.org.uk> <20140212054043.GB13997@dastard> <20140212113928.GO18016@ZenIV.linux.org.uk> <20140212211421.GP18016@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 On 02/12, Linus Torvalds wrote: > > On Wed, Feb 12, 2014 at 1:14 PM, Al Viro wrote: > > > > Umm... What if we delay __sigqueue_free()? After all, that's where the > > fat sucker normally comes from. That way we might get away with much > > smaller structure on stack... > > Sounds like the RightThing(tm) to do to me, and I don't see why it > wouldn't work. Probably... I'll try to reply tomorrow. > We'd have to teach each user of "dequeue_signal()" to free the siginfo > thing. And we should be careful with SIGQUEUE_PREALLOC, at least collect_signal() should not do list_del_init()... Plus we need to handle the SEND_SIG_FORCED-like case. 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/