From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f49.google.com (mail-wg0-f49.google.com [74.125.82.49]) by kanga.kvack.org (Postfix) with ESMTP id 058E56B0035 for ; Thu, 10 Jul 2014 08:09:34 -0400 (EDT) Received: by mail-wg0-f49.google.com with SMTP id a1so5493108wgh.20 for ; Thu, 10 Jul 2014 05:09:34 -0700 (PDT) Received: from zene.cmpxchg.org (zene.cmpxchg.org. [2a01:238:4224:fa00:ca1f:9ef3:caee:a2bd]) by mx.google.com with ESMTPS id ku4si43631161wjb.157.2014.07.10.05.09.33 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 10 Jul 2014 05:09:34 -0700 (PDT) Date: Thu, 10 Jul 2014 08:09:31 -0400 From: Johannes Weiner Subject: Re: [PATCH 4/6] mm: vmscan: Only update per-cpu thresholds for online CPU Message-ID: <20140710120931.GL29639@cmpxchg.org> References: <1404893588-21371-1-git-send-email-mgorman@suse.de> <1404893588-21371-5-git-send-email-mgorman@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1404893588-21371-5-git-send-email-mgorman@suse.de> Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Andrew Morton , Linux Kernel , Linux-MM , Linux-FSDevel On Wed, Jul 09, 2014 at 09:13:06AM +0100, Mel Gorman wrote: > When kswapd is awake reclaiming, the per-cpu stat thresholds are > lowered to get more accurate counts to avoid breaching watermarks. This > threshold update iterates over all possible CPUs which is unnecessary. > Only online CPUs need to be updated. If a new CPU is onlined, > refresh_zone_stat_thresholds() will set the thresholds correctly. > > Signed-off-by: Mel Gorman Acked-by: Johannes Weiner -- 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