Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751722Ab3CUTDW (ORCPT ); Thu, 21 Mar 2013 15:03:22 -0400 Received: from a10-78.smtp-out.amazonses.com ([54.240.10.78]:33520 "EHLO a10-78.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751268Ab3CUTDV (ORCPT ); Thu, 21 Mar 2013 15:03:21 -0400 X-Greylist: delayed 598 seconds by postgrey-1.27 at vger.kernel.org; Thu, 21 Mar 2013 15:03:21 EDT Date: Thu, 21 Mar 2013 18:53:22 +0000 From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Steven Rostedt cc: paulmck@linux.vnet.ibm.com, Frederic Weisbecker , Rob Landley , linux-kernel@vger.kernel.org, josh@joshtriplett.org, zhong@linux.vnet.ibm.com, khilman@linaro.org, geoff@infradead.org, tglx@linutronix.de Subject: Re: [PATCH] nohz1: Documentation In-Reply-To: <1363891462.6345.52.camel@gandalf.local.home> Message-ID: <0000013d8e4c5d16-505199e0-9117-48e5-9280-951b42797209-000000@email.amazonses.com> References: <1363636794.15703.32@driftwood> <20130318222548.GG3656@linux.vnet.ibm.com> <1363822338.6345.33.camel@gandalf.local.home> <20130320235545.GL3637@linux.vnet.ibm.com> <0000013d8db514e4-bf492080-82c9-412a-90b8-54ddc1463e4b-000000@email.amazonses.com> <20130321171518.GW3637@linux.vnet.ibm.com> <1363891462.6345.52.camel@gandalf.local.home> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SES-Outgoing: 54.240.10.78 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 798 Lines: 18 On Thu, 21 Mar 2013, Steven Rostedt wrote: > For now, no, if more than one process is scheduled on the CPU, we fall > out of dynamic tick mode. In the future, we can add SCHED_FIFO task > scheduled in to trigger it. But lets conquer that after we successfully > conquer the current changes. Be glad to see whatever is possible merged as soon as possible. But be aware that we will fall out of dyntick mode at mininum every 2 seconds because that is when the per cpu vm stats and the slab scanning is occurring. These are both deferrable activities. -- 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/