From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751304AbdH2Q51 (ORCPT ); Tue, 29 Aug 2017 12:57:27 -0400 Received: from mga09.intel.com ([134.134.136.24]:24112 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751263AbdH2Q50 (ORCPT ); Tue, 29 Aug 2017 12:57:26 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.41,445,1498546800"; d="scan'208";a="1008917480" Subject: Re: [PATCH 2/2 v2] sched/wait: Introduce lock breaker in wake_up_page_bit To: Linus Torvalds Cc: "Liang, Kan" , Mel Gorman , Peter Zijlstra , Ingo Molnar , Andi Kleen , Andrew Morton , Johannes Weiner , Jan Kara , Christopher Lameter , "Eric W . Biederman" , Davidlohr Bueso , linux-mm , Linux Kernel Mailing List References: <83f675ad385d67760da4b99cd95ee912ca7c0b44.1503677178.git.tim.c.chen@linux.intel.com> <37D7C6CF3E00A74B8858931C1DB2F077537A07E9@SHSMSX103.ccr.corp.intel.com> <37D7C6CF3E00A74B8858931C1DB2F077537A1C19@SHSMSX103.ccr.corp.intel.com> From: Tim Chen Message-ID: Date: Tue, 29 Aug 2017 09:57:24 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/29/2017 09:24 AM, Linus Torvalds wrote: > On Tue, Aug 29, 2017 at 9:13 AM, Tim Chen wrote: >> >> It is affecting not a production use, but the customer's acceptance >> test for their systems. So I suspect it is a stress test. > > Can you gently poke them and ask if they might make theie stress test > code available? > > Tell them that we have a fix, but right now it's delayed into 4.14 > because we have no visibility into what it is that it actually fixes, > and whether it's all that critical or just some microbenchmark. > Thanks. We'll do that. Tim From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id 82DBE6B025F for ; Tue, 29 Aug 2017 12:57:27 -0400 (EDT) Received: by mail-pf0-f200.google.com with SMTP id n73so6934207pfj.9 for ; Tue, 29 Aug 2017 09:57:27 -0700 (PDT) Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTPS id w24si2718134pfl.24.2017.08.29.09.57.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Aug 2017 09:57:26 -0700 (PDT) Subject: Re: [PATCH 2/2 v2] sched/wait: Introduce lock breaker in wake_up_page_bit References: <83f675ad385d67760da4b99cd95ee912ca7c0b44.1503677178.git.tim.c.chen@linux.intel.com> <37D7C6CF3E00A74B8858931C1DB2F077537A07E9@SHSMSX103.ccr.corp.intel.com> <37D7C6CF3E00A74B8858931C1DB2F077537A1C19@SHSMSX103.ccr.corp.intel.com> From: Tim Chen Message-ID: Date: Tue, 29 Aug 2017 09:57:24 -0700 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds Cc: "Liang, Kan" , Mel Gorman , Peter Zijlstra , Ingo Molnar , Andi Kleen , Andrew Morton , Johannes Weiner , Jan Kara , Christopher Lameter , "Eric W . Biederman" , Davidlohr Bueso , linux-mm , Linux Kernel Mailing List On 08/29/2017 09:24 AM, Linus Torvalds wrote: > On Tue, Aug 29, 2017 at 9:13 AM, Tim Chen wrote: >> >> It is affecting not a production use, but the customer's acceptance >> test for their systems. So I suspect it is a stress test. > > Can you gently poke them and ask if they might make theie stress test > code available? > > Tell them that we have a fix, but right now it's delayed into 4.14 > because we have no visibility into what it is that it actually fixes, > and whether it's all that critical or just some microbenchmark. > Thanks. We'll do that. Tim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org