From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756736AbbJAPkx (ORCPT ); Thu, 1 Oct 2015 11:40:53 -0400 Received: from mail-wi0-f169.google.com ([209.85.212.169]:36463 "EHLO mail-wi0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751123AbbJAPku (ORCPT ); Thu, 1 Oct 2015 11:40:50 -0400 Date: Thu, 1 Oct 2015 17:40:47 +0200 From: Frederic Weisbecker To: Peter Zijlstra Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, oleg@redhat.com, umgwanakikbuti@gmail.com, tglx@linutronix.de, rostedt@goodmis.org Subject: Re: [PATCH v2 09/12] sched, x86: Kill saved_preempt_count Message-ID: <20151001154046.GC23943@lerouge> References: <20150930071035.514587432@infradead.org> <20150930072304.488021307@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150930072304.488021307@infradead.org> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 30, 2015 at 09:10:44AM +0200, Peter Zijlstra wrote: > With the introduction of the context switch preempt_count invariant, > and the demise of PREEMPT_ACTIVE, its pointless to save/restore the > per-cpu preemption count, it must always be the same. > > Reviewed-by: Thomas Gleixner > Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Good news as well.