From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f175.google.com (mail-wi0-f175.google.com [209.85.212.175]) by kanga.kvack.org (Postfix) with ESMTP id 2AD766B0035 for ; Fri, 19 Sep 2014 09:29:24 -0400 (EDT) Received: by mail-wi0-f175.google.com with SMTP id cc10so2825461wib.14 for ; Fri, 19 Sep 2014 06:29:23 -0700 (PDT) Received: from gum.cmpxchg.org (gum.cmpxchg.org. [85.214.110.215]) by mx.google.com with ESMTPS id we4si2174269wjb.82.2014.09.19.06.29.22 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 19 Sep 2014 06:29:22 -0700 (PDT) Date: Fri, 19 Sep 2014 09:29:19 -0400 From: Johannes Weiner Subject: Re: [patch] mm: memcontrol: lockless page counters Message-ID: <20140919132919.GA16184@cmpxchg.org> References: <1411132928-16143-1-git-send-email-hannes@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1411132928-16143-1-git-send-email-hannes@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Michal Hocko , Greg Thelen , Dave Hansen , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Hi Dave, this patch removes the lock you saw with will-it-scale/page_fault2 entirely, is there a chance you could give it a spin? It's based on v3.17-rc4-mmots-2014-09-12-17-13-4 and that memcg THP fix. That kernel also includes the recent root-memcg revert, so you'd have to run it in a memcg; which is as easy as: mkdir /sys/fs/cgroup/memory/foo echo $$ >/sys/fs/cgroup/memory/foo/tasks perf record -g -a ./runtest.py page_fault2 Thanks! -- 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