From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030295Ab2CFCp0 (ORCPT ); Mon, 5 Mar 2012 21:45:26 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:3939 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030235Ab2CFCpX (ORCPT ); Mon, 5 Mar 2012 21:45:23 -0500 X-Authority-Analysis: v=2.0 cv=Xp94yC59 c=1 sm=0 a=ZycB6UtQUfgMyuk2+PxD7w==:17 a=XQbtiDEiEegA:10 a=UBy9sU4F98IA:10 a=KQ6c0xBlc9AA:10 a=5SG0PmZfjMsA:10 a=bbbx4UPp9XUA:10 a=wSLYzwFYvDYAolsnLsIA:9 a=ZycB6UtQUfgMyuk2+PxD7w==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.67.80.29 Message-Id: <20120306023835.775610473@goodmis.org> User-Agent: quilt/0.50-1 Date: Mon, 05 Mar 2012 21:38:35 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-rt-users Cc: Thomas Gleixner , Carsten Emde , Clark Williams Subject: [PATCH RT 0/3][FYI only] 3.2-rt cpu hotplug fix (hack) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an FYI patch set only. It fixes a lot of the races that the current -rt patch has with stressing hotplug. Although this patch set (well patch one really) does prove to solve a lot of the race conditions caused by notifiers waiting on tasks that may be on the CPU going down, the patch itself is not at the state that it should be accepted. I'm posting this only for those that need a current fix while we work on a real fix. Again, this patch set is an actual fix to several issues with hotplug. But it makes the code even more hacky and there's better ways to solve the issues. I've been running my CPU hotplug stress test and a distcc kernel compile (-j20) on a 4 way machine for the last 30 minutes (both in a while loop) and it's still going strong. This patch set goes on top of 3.2.9-rt15 Have fun, -- Steve