From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f44.google.com (mail-pa0-f44.google.com [209.85.220.44]) by kanga.kvack.org (Postfix) with ESMTP id D53206B0036 for ; Thu, 22 May 2014 14:24:00 -0400 (EDT) Received: by mail-pa0-f44.google.com with SMTP id ld10so2844296pab.17 for ; Thu, 22 May 2014 11:24:00 -0700 (PDT) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTP id eb4si686024pbb.113.2014.05.22.11.23.59 for ; Thu, 22 May 2014 11:23:59 -0700 (PDT) Date: Thu, 22 May 2014 11:23:57 -0700 From: Andrew Morton Subject: Re: [PATCH 09/19] mm: page_alloc: Use word-based accesses for get/set pageblock bitmaps Message-Id: <20140522112357.4715059bb69273f40c3ec4f2@linux-foundation.org> In-Reply-To: <537DC247.5020801@suse.cz> References: <1399974350-11089-1-git-send-email-mgorman@suse.de> <1399974350-11089-10-git-send-email-mgorman@suse.de> <537DC247.5020801@suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: Mel Gorman , Joonsoo Kim , Johannes Weiner , Jan Kara , Michal Hocko , Hugh Dickins , Peter Zijlstra , Dave Hansen , Linux Kernel , Linux-MM , Linux-FSDevel 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. Miraculously, the patch applies OK to 3.14. And it compiles! -- 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