From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754533Ab1KUNqR (ORCPT ); Mon, 21 Nov 2011 08:46:17 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:58906 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753093Ab1KUNqP (ORCPT ); Mon, 21 Nov 2011 08:46:15 -0500 X-Authority-Analysis: v=2.0 cv=JOm5Qr2b c=1 sm=0 a=ZycB6UtQUfgMyuk2+PxD7w==:17 a=VrcpeX3YRb0A:10 a=5SG0PmZfjMsA:10 a=IkcTkHD0fZMA:10 a=8B0y74AbsREmsCCZHrwA:9 a=QEXdDO2ut3YA:10 a=ZycB6UtQUfgMyuk2+PxD7w==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.80.29 Subject: Re: [patch] mm: memcg: shorten preempt-disabled section around event checks From: Steven Rostedt To: Johannes Weiner Cc: Andrew Morton , KAMEZAWA Hiroyuki , Michal Hocko , Yong Zhang , Luis Henriques , Thomas Gleixner , Peter Zijlstra , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <20111121110954.GE1771@redhat.com> References: <20111121110954.GE1771@redhat.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 21 Nov 2011 08:46:07 -0500 Message-ID: <1321883167.20742.4.camel@frodo> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-1.fc14) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2011-11-21 at 12:09 +0100, Johannes Weiner wrote: > -rt ran into a problem with the soft limit spinlock inside the > non-preemptible section, because that is sleeping inside an atomic > context. But I think it makes sense for vanilla, too, to keep the > non-preemptible section as short as possible. Also, -3 lines. > Johannes, Thanks for this patch. It is very much appreciated by us -rt folks :) -- Steve