From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752196AbeFEUBB (ORCPT ); Tue, 5 Jun 2018 16:01:01 -0400 Received: from outbound-smtp11.blacknight.com ([46.22.139.106]:36420 "EHLO outbound-smtp11.blacknight.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751950AbeFEUBA (ORCPT ); Tue, 5 Jun 2018 16:01:00 -0400 Date: Tue, 5 Jun 2018 21:00:58 +0100 From: Mel Gorman To: Dave Hansen Cc: Andrew Morton , mhocko@kernel.org, vbabka@suse.cz, Aaron Lu , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] mremap: Avoid TLB flushing anonymous pages that are not in swap cache Message-ID: <20180605200058.fy4oy5znf6j4pckj@techsingularity.net> References: <20180605171319.uc5jxdkxopio6kg3@techsingularity.net> <20180605191245.3owve7gfut22tyob@techsingularity.net> <20180605195140.afc7xzgbre26m76l@techsingularity.net> <9dc03a4b-d359-8817-a950-b98e246dcd95@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <9dc03a4b-d359-8817-a950-b98e246dcd95@intel.com> User-Agent: NeoMutt/20170912 (1.9.0) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 05, 2018 at 12:54:27PM -0700, Dave Hansen wrote: > On 06/05/2018 12:51 PM, Mel Gorman wrote: > > Using another testcase that simply calls mremap heavily with varying number > > of threads, it was found that very broadly speaking that TLB shootdowns > > were reduced by 31% on average throughout the entire test case but your > > milage will vary. > > Looks good to me. Feel free to add my Reviewed-by. Thanks, I'll send a proper v2 when I hear back from the customer on what the impact on the real workload is. -- Mel Gorman SUSE Labs