From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stanislav Meduna Subject: Re: hrtimer: interrupt took 6742 ns, then RT throttling and hung machine for nearly 2 seconds Date: Mon, 15 Apr 2013 14:56:29 +0200 Message-ID: <516BF8FD.2000700@meduna.org> References: <516BDE52.90200@meduna.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "linux-rt-users@vger.kernel.org" To: Thomas Gleixner Return-path: Received: from www.meduna.org ([92.240.244.38]:41480 "EHLO meduna.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751086Ab3DOM4i (ORCPT ); Mon, 15 Apr 2013 08:56:38 -0400 In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 15.04.2013 14:22, Thomas Gleixner wrote: > Yes, we decoded that problem a week ago. Patch is available here: > > http://www.spinics.net/lists/linux-tip-commits/msg19100.html > > It's on the way to Linus tree, so it will come via the stable updates > to RT soon. Hmm, this is a uniprocessor. Could this still happen via some interrupt or something? # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 13 model name : Intel(R) Celeron(R) M processor 1.00GHz stepping : 8 cpu MHz : 999.993 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx bts bogomips : 1999.98 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: Thanks -- Stano