From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f72.google.com (mail-wm0-f72.google.com [74.125.82.72]) by kanga.kvack.org (Postfix) with ESMTP id CFF756B0253 for ; Wed, 18 Jan 2017 04:26:38 -0500 (EST) Received: by mail-wm0-f72.google.com with SMTP id d140so1874529wmd.4 for ; Wed, 18 Jan 2017 01:26:38 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id 6si28452397wrp.137.2017.01.18.01.26.37 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 18 Jan 2017 01:26:37 -0800 (PST) Subject: Re: [RFC 3/4] mm, page_alloc: move cpuset seqcount checking to slowpath References: <20170117221610.22505-1-vbabka@suse.cz> <20170117221610.22505-4-vbabka@suse.cz> <036f01d2715b$97827e80$c6877b80$@alibaba-inc.com> From: Vlastimil Babka Message-ID: <372726f9-3bc9-217f-3bf5-c40d3e52a6b6@suse.cz> Date: Wed, 18 Jan 2017 10:26:34 +0100 MIME-Version: 1.0 In-Reply-To: <036f01d2715b$97827e80$c6877b80$@alibaba-inc.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Hillf Danton , 'Mel Gorman' , 'Ganapatrao Kulkarni' Cc: 'Michal Hocko' , linux-kernel@vger.kernel.org, linux-mm@kvack.org On 01/18/2017 08:22 AM, Hillf Danton wrote: > On Wednesday, January 18, 2017 6:16 AM Vlastimil Babka wrote: >> >> This is a preparation for the following patch to make review simpler. While >> the primary motivation is a bug fix, this could also save some cycles in the >> fast path. >> > This also gets kswapd involved. > Dunno how frequent cpuset is changed in real life. I don't think the extra kswapd wakeups due to retry_cpuset would be noticeable. Such frequent cpuset changes would likely have their own associated overhead larger than the wakeups. > > Hillf > -- 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