From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751958AbbDPQzw (ORCPT ); Thu, 16 Apr 2015 12:55:52 -0400 Received: from mga11.intel.com ([192.55.52.93]:6896 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752021AbbDPQzo (ORCPT ); Thu, 16 Apr 2015 12:55:44 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,589,1422950400"; d="scan'208";a="557207548" Message-ID: <552FE98F.2080705@intel.com> Date: Thu, 16 Apr 2015 09:55:43 -0700 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Mel Gorman , Linux-MM CC: Rik van Riel , Hugh Dickins , Minchan Kim , Andi Kleen , LKML Subject: Re: [PATCH 1/4] x86, mm: Trace when an IPI is about to be sent References: <1429179766-26711-1-git-send-email-mgorman@suse.de> <1429179766-26711-2-git-send-email-mgorman@suse.de> In-Reply-To: <1429179766-26711-2-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/16/2015 03:22 AM, Mel Gorman wrote: > It is easy to trace when an IPI is received to flush a TLB but harder to > detect what event sent it. This patch makes it easy to identify the source > of IPIs being transmitted for TLB flushes on x86. Looks fine to me. I think I even thought about adding this but didn't see an immediate need for it. I guess this does let you see how many IPIs are sent vs. received. Reviewed-by: Dave Hansen