Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268828AbUJPT7o (ORCPT ); Sat, 16 Oct 2004 15:59:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268824AbUJPT7n (ORCPT ); Sat, 16 Oct 2004 15:59:43 -0400 Received: from brown.brainfood.com ([146.82.138.61]:8576 "EHLO gradall.private.brainfood.com") by vger.kernel.org with ESMTP id S268817AbUJPT7j (ORCPT ); Sat, 16 Oct 2004 15:59:39 -0400 Date: Sat, 16 Oct 2004 14:59:36 -0500 (CDT) From: Adam Heath X-X-Sender: adam@gradall.private.brainfood.com To: Ingo Molnar cc: linux-kernel@vger.kernel.org Subject: Re: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U4 In-Reply-To: <20041016193626.GB10626@elte.hu> Message-ID: References: <20041012091501.GA18562@elte.hu> <20041012123318.GA2102@elte.hu> <20041012195424.GA3961@elte.hu> <20041013061518.GA1083@elte.hu> <20041014002433.GA19399@elte.hu> <20041014143131.GA20258@elte.hu> <20041014234202.GA26207@elte.hu> <20041015102633.GA20132@elte.hu> <20041016153344.GA16766@elte.hu> <20041016193626.GB10626@elte.hu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1254 Lines: 33 On Sat, 16 Oct 2004, Ingo Molnar wrote: > > * Adam Heath wrote: > > > > i have released the -U4 PREEMPT_REALTIME patch: > > > > > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc4-mm1-U4 > > > > > > this is a fixes-only release, and it is still experimental code. > > > > Few stack dumps now. > > these are normal, they are the PREEMPT_TIMING traces which get printed > every time the kernel measures a new latency maximum. The stack dumps > are done to make it easier to identify which place too that long of a > delay and why. (if LATENCY_TRACE is enabled too then the last latency > and its trace can also be found in /proc/latency_trace.) > > after bootup it makes sense to reset the maximum: > > echo 10 > /proc/sys/kernel/preempt_max_latency > > because during bootup there are a number of latencies that are one-time > only. So, I did that, and immediately started getting more stack dumps. Are these things that are interesting, or only informational? - 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/