From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Gortmaker Subject: Re: [PATCH RT v2] kernel/res_counter.c: Change lock of struct res_counter to raw_spinlock_t Date: Fri, 20 Feb 2015 13:53:24 -0500 Message-ID: <54E782A4.3030502@windriver.com> References: <1420745917-50747-1-git-send-email-tmac@hp.com> <1422644389-33074-1-git-send-email-tmac@hp.com> <20150213191909.GA8299@windriver.com> <54DE6AD5.9070000@hp.com> <20150213213016.GC7102@windriver.com> <20150218110552.GE28763@linutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Cc: Thavatchai Makphaibulchoke , Thavatchai Makphaibulchoke , , , , , To: Sebastian Andrzej Siewior Return-path: In-Reply-To: <20150218110552.GE28763@linutronix.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On 2015-02-18 06:05 AM, Sebastian Andrzej Siewior wrote: > * Paul Gortmaker | 2015-02-13 16:30:17 [-0500]: > > there is the thread "[v3.10-rt / v3.12-rt] scheduling while atomic in > cgroup code" where I applied Mike's patch. This should fix the problem > reported and be part of the next release. > Could please double check (either by grabing the patch or waiting for > the next release). I've applied Mike's patch from here: https://lkml.org/lkml/2014/6/21/11 and tested it on the old dell core2 that reliably showed the splat at boot, and it is now gone. This is on vanilla 3.14-rt plus isci fix + simpleworkqueue + aio-swq fix (all pending for 3.18-rt next). I also tested it on the 20 core canoe pass where the rawlock conversion patch from Thavatchai caused strange and unpredictable failure modes and that box seems fine with this smaller footprint cpulight change. Paul. -- > > Sebastian >