Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754896AbYCJQhg (ORCPT ); Mon, 10 Mar 2008 12:37:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751445AbYCJQhF (ORCPT ); Mon, 10 Mar 2008 12:37:05 -0400 Received: from wx-out-0506.google.com ([66.249.82.231]:8188 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751252AbYCJQhE (ORCPT ); Mon, 10 Mar 2008 12:37:04 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:reply-to:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=L9qwnqPWNX2VPYNFzzUBvOdX5RpYrFPiSe/8GKltPnzULqIAptD0m/54/AtDlwFdYjqrTomm1s0SlKvYrnPii46+qQQLjOZoEQ9n4ygT1FmszNAJUXoUEhR4EtuyB5Ip9zs++HbQKH4MLuZ/hnCL0IP0HsPejL9ttHZguEv8zh8= Message-ID: <47D56399.1020504@gmail.com> Date: Mon, 10 Mar 2008 12:36:41 -0400 From: Gregory Haskins Reply-To: gregory.haskins@gmail.com User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) MIME-Version: 1.0 To: ego@in.ibm.com CC: Ingo Molnar , Thomas Gleixner , linux-kernel@vger.kernel.org, Dhaval Giani Subject: Re: [PATCH] x86: Don't send RESCHEDULE_VECTOR to offlined cpus References: <20080310121403.GD17646@in.ibm.com> <20080310122418.GA12101@elte.hu> <20080310125414.GE17646@in.ibm.com> In-Reply-To: <20080310125414.GE17646@in.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1126 Lines: 29 Gautham R Shenoy wrote: > On Mon, Mar 10, 2008 at 01:24:18PM +0100, Ingo Molnar wrote: >> * Gautham R Shenoy wrote: >> >>> x86: Don't send RESCHEDULE_VECTOR to offlined cpus. >>> From: Gautham R Shenoy >>> >>> In the x86 native_smp_send_reschedule_function(), don't send the IPI >>> if the cpu has gone offline already. Warn nevertheless!! >> have you seen this happen? > > Yup, this afternoon while running > cpu-hotplug stress tests (http://lkml.org/lkml/2008/3/3/11) > in parallel with kern-bench, I got this on the serial console. Note that this may be a side-effect of the bug we are chasing with the rd->online problem. E.g. if the rd->online issue is causing us to route tasks to dead CPUs, this phenomenon would probably go away once rd->online is fixed (which I believe it is with the patches that were submitted). Regards, -Greg -- 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/