From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: Re: linux-next: Tree for April 14 (Call-traces: RCU/ACPI/WQ related?) Date: Tue, 26 Apr 2011 04:31:13 -0700 Message-ID: <20110426113113.GH4308@linux.vnet.ibm.com> References: <20110422150222.GA2300@linux.vnet.ibm.com> <20110423210539.GI2628@linux.vnet.ibm.com> <20110424062728.GM2628@linux.vnet.ibm.com> <20110424164331.GN2628@linux.vnet.ibm.com> <1303812417.20212.239.camel@twins> Reply-To: paulmck@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from e3.ny.us.ibm.com ([32.97.182.143]:49260 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754349Ab1DZLbR (ORCPT ); Tue, 26 Apr 2011 07:31:17 -0400 Content-Disposition: inline In-Reply-To: <1303812417.20212.239.camel@twins> Sender: linux-next-owner@vger.kernel.org List-ID: To: Peter Zijlstra Cc: sedat.dilek@gmail.com, Stephen Rothwell , linux-next@vger.kernel.org, LKML On Tue, Apr 26, 2011 at 12:06:57PM +0200, Peter Zijlstra wrote: > On Sun, 2011-04-24 at 09:43 -0700, Paul E. McKenney wrote: > > > > Peter, any thoughts on what I might have done wrong to get the scheduler > > into a state where it was ignoring a runnable realtime task? > > Not really, the only thing I can think of is something like poking at > task->state while its sleeping. One you set it to TASK_RUNNING wakeups > will be ignored since its already running ;-) Well, that does give my something to check for -- thank you! Thanx, Paul