Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752487AbaF0DWy (ORCPT ); Thu, 26 Jun 2014 23:22:54 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:34272 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751406AbaF0DWx (ORCPT ); Thu, 26 Jun 2014 23:22:53 -0400 Message-ID: <1403839369.20458.12.camel@marge.simpson.net> Subject: Re: Filesystem lockup with CONFIG_PREEMPT_RT From: Mike Galbraith To: Austin Schuh Cc: Thomas Gleixner , Richard Weinberger , LKML , rt-users , Steven Rostedt Date: Fri, 27 Jun 2014 05:22:49 +0200 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2014-06-26 at 17:07 -0700, Austin Schuh wrote: > If I'm reading the rt patch correctly, wq_worker_sleeping was moved > out of __schedule to sched_submit_work. It looks like that changes > the conditions under which wq_worker_sleeping is called. It used to > be called whenever a task was going to sleep (I think). It looks like > it is called now if the task is going to sleep, and if the task isn't > blocked on a PI mutex (I think). Re-entanglement does turn your killer into a happy camper, but that patch is too lovely to just surrender without a squabble. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/