From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-f44.google.com (mail-ee0-f44.google.com [74.125.83.44]) by kanga.kvack.org (Postfix) with ESMTP id D5FE46B0036 for ; Thu, 22 May 2014 14:45:09 -0400 (EDT) Received: by mail-ee0-f44.google.com with SMTP id c41so2923924eek.31 for ; Thu, 22 May 2014 11:45:09 -0700 (PDT) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id x47si2030717eey.141.2014.05.22.11.45.07 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 22 May 2014 11:45:08 -0700 (PDT) Message-ID: <537E45B0.8040304@suse.cz> Date: Thu, 22 May 2014 20:45:04 +0200 From: Vlastimil Babka MIME-Version: 1.0 Subject: Re: [PATCH 09/19] mm: page_alloc: Use word-based accesses for get/set pageblock bitmaps References: <1399974350-11089-1-git-send-email-mgorman@suse.de> <1399974350-11089-10-git-send-email-mgorman@suse.de> <537DC247.5020801@suse.cz> <20140522112357.4715059bb69273f40c3ec4f2@linux-foundation.org> In-Reply-To: <20140522112357.4715059bb69273f40c3ec4f2@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Mel Gorman , Joonsoo Kim , Johannes Weiner , Jan Kara , Michal Hocko , Hugh Dickins , Peter Zijlstra , Dave Hansen , Linux Kernel , Linux-MM , Linux-FSDevel On 22.5.2014 20:23, Andrew Morton wrote: > On Thu, 22 May 2014 11:24:23 +0200 Vlastimil Babka wrote: > >>> In a test running dd onto tmpfs the overhead of the pageblock-related >>> functions went from 1.27% in profiles to 0.5%. >>> >>> Signed-off-by: Mel Gorman >>> Acked-by: Vlastimil Babka >> Hi, I've tested if this closes the race I've been previously trying to fix >> with the series in http://marc.info/?l=linux-mm&m=139359694028925&w=2 >> And indeed with this patch I wasn't able to reproduce it in my stress test >> (which adds lots of memory isolation calls) anymore. So thanks to Mel I can >> dump my series in the trashcan :P >> >> Therefore I believe something like below should be added to the changelog, >> and put to stable as well. > OK, I made it so. Thanks. > Miraculously, the patch applies OK to 3.14. And it compiles! Great, shipping time! Vlastimil -- 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