From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752715AbbLLOg1 (ORCPT ); Sat, 12 Dec 2015 09:36:27 -0500 Received: from www.linutronix.de ([62.245.132.108]:51880 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751330AbbLLOg0 (ORCPT ); Sat, 12 Dec 2015 09:36:26 -0500 Date: Sat, 12 Dec 2015 15:35:36 +0100 (CET) From: Thomas Gleixner To: "Shi, Yang" cc: Sebastian Andrzej Siewior , rostedt@goodmis.org, linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, linaro-kernel@lists.linaro.org Subject: Re: [PATCH] rt: x86: extend signal send delay to 32 bit In-Reply-To: <566B275A.5070300@linaro.org> Message-ID: References: <1449773931-7200-1-git-send-email-yang.shi@linaro.org> <20151211180532.GO6720@linutronix.de> <566B275A.5070300@linaro.org> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 11 Dec 2015, Shi, Yang wrote: > On 12/11/2015 10:05 AM, Sebastian Andrzej Siewior wrote: > > * Yang Shi | 2015-12-10 10:58:51 [-0800]: > > > Signal send delay is just available for x86-64, x86-32 needs it too. > > > > This is new, this was not the case earlier. New means since v4.0-rc1 which > > Yes, it is. We didn't find this problem in earlier version kernel (I'd say > 3.x). > > > is when 959274753857 ("x86, traps: Track entry into and exit from IST > > context") got merged. > > Since now ist_enter() disables preemption in any case, our hacks to > > conditional_sti_ist() are pointless and could be removed. > > I'm supposed you will revert it and not need a revert patch from me. Why do you think that reverting it is a good idea? Just because we can or what? No, we fix it up on the RT side. Thanks, tglx