From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1AD7EC31E46 for ; Wed, 12 Jun 2019 13:35:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3E59208CA for ; Wed, 12 Jun 2019 13:35:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728945AbfFLNfj (ORCPT ); Wed, 12 Jun 2019 09:35:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51930 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726747AbfFLNfi (ORCPT ); Wed, 12 Jun 2019 09:35:38 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5B9263086236; Wed, 12 Jun 2019 13:35:26 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.43.17.159]) by smtp.corp.redhat.com (Postfix) with SMTP id D98E1795BE; Wed, 12 Jun 2019 13:35:20 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Wed, 12 Jun 2019 15:35:26 +0200 (CEST) Date: Wed, 12 Jun 2019 15:35:20 +0200 From: Oleg Nesterov To: David Laight Cc: "'Eric W. Biederman'" , 'Andrew Morton' , 'Deepa Dinamani' , "'linux-kernel@vger.kernel.org'" , "'arnd@arndb.de'" , "'dbueso@suse.de'" , "'axboe@kernel.dk'" , "'dave@stgolabs.net'" , "'e@80x24.org'" , "'jbaron@akamai.com'" , "'linux-fsdevel@vger.kernel.org'" , "'linux-aio@kvack.org'" , "'omar.kilani@gmail.com'" , "'tglx@linutronix.de'" , 'Al Viro' , 'Linus Torvalds' , "'linux-arch@vger.kernel.org'" Subject: Re: [RFC PATCH 1/5] signal: Teach sigsuspend to use set_user_sigmask Message-ID: <20190612133519.GA3276@redhat.com> References: <20190604134117.GA29963@redhat.com> <20190606140814.GA13440@redhat.com> <87k1dxaxcl.fsf_-_@xmission.com> <87ef45axa4.fsf_-_@xmission.com> <20190610162244.GB8127@redhat.com> <87lfy96sta.fsf@xmission.com> <9199239a450d4ea397783ccf98742220@AcuMS.aculab.com> <95decc6904754004af8a5546aca0468a@AcuMS.aculab.com> <87pnnj2ca0.fsf@xmission.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Wed, 12 Jun 2019 13:35:38 +0000 (UTC) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 06/12, David Laight wrote: > > > > If I add a signal handler for SIGINT it is called when pselect() > > > returns regardless of the return value. > > > > That is odd. Is this with Oleg's fix applied? > > No it is a 5.1.0-rc5 kernel with no related local patches. > So it is the 'historic' behaviour of pselect(). No, this is not historic behaviour, > But not the original one! Under 2.6.22-5-31 the signal handler isn't caller > when pselect() returns 1. This is historic behaviour. And it was broken by 854a6ed56839a4 ("signal: Add restore_user_sigmask()"). And this is what we already discussed many, many times in this thread ;) Oleg.