From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f70.google.com (mail-wm0-f70.google.com [74.125.82.70]) by kanga.kvack.org (Postfix) with ESMTP id D5EA46B02B4 for ; Fri, 2 Jun 2017 13:00:01 -0400 (EDT) Received: by mail-wm0-f70.google.com with SMTP id w79so17730737wme.7 for ; Fri, 02 Jun 2017 10:00:01 -0700 (PDT) Received: from mail-wm0-x229.google.com (mail-wm0-x229.google.com. [2a00:1450:400c:c09::229]) by mx.google.com with ESMTPS id u22si12778835wrb.323.2017.06.02.10.00.00 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 02 Jun 2017 10:00:00 -0700 (PDT) Received: by mail-wm0-x229.google.com with SMTP id d127so31560945wmf.0 for ; Fri, 02 Jun 2017 10:00:00 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20170602071818.GA29840@dhcp22.suse.cz> References: <1496317427-5640-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp> <20170601115936.GA9091@dhcp22.suse.cz> <201706012211.GHI18267.JFOVMSOLFFQHOt@I-love.SAKURA.ne.jp> <20170601132808.GD9091@dhcp22.suse.cz> <20170601151022.b17716472adbf0e6d51fb011@linux-foundation.org> <20170602071818.GA29840@dhcp22.suse.cz> From: Cong Wang Date: Fri, 2 Jun 2017 09:59:39 -0700 Message-ID: Subject: Re: [PATCH] mm,page_alloc: Serialize warn_alloc() if schedulable. Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko Cc: Andrew Morton , Tetsuo Handa , linux-mm@kvack.org, dave.hansen@intel.com, Johannes Weiner , Mel Gorman , vbabka@suse.cz On Fri, Jun 2, 2017 at 12:18 AM, Michal Hocko wrote: > The changelog doesn't really explain what is going on and only > speculates that the excessive warn_alloc is the cause. The kernel is > 4.9.23.el7.twitter.x86_64 which I suspect contains a lot of stuff on top > of 4.9. So I would really _like_ to see whether this is reproducible > with the upstream kernel. Especially when this is a LTP test. Just FYI: our kernel 4.9.23.el7.twitter.x86_64 is almost same with the upstream 4.9.23 release, with just _few_ non-mm patches backported. We do have test machines to test non-stable kernels but it is slightly harder to build an upstream kernel on them, I mean not as convenient as a kernel rpm... -- 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