From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2C43C04EB9 for ; Mon, 15 Oct 2018 22:45:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E5A0208B3 for ; Mon, 15 Oct 2018 22:45:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E5A0208B3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727045AbeJPGcT (ORCPT ); Tue, 16 Oct 2018 02:32:19 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:34470 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726896AbeJPGcS (ORCPT ); Tue, 16 Oct 2018 02:32:18 -0400 Received: from akpm3.svl.corp.google.com (unknown [104.133.8.65]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id C42C11B95; Mon, 15 Oct 2018 22:45:00 +0000 (UTC) Date: Mon, 15 Oct 2018 15:44:59 -0700 From: Andrew Morton To: David Rientjes Cc: Andrea Arcangeli , Michal Hocko , Mel Gorman , Vlastimil Babka , Andrea Argangeli , Zi Yan , Stefan Priebe - Profihost AG , "Kirill A. Shutemov" , linux-mm@kvack.org, LKML , Stable tree Subject: Re: [PATCH 1/2] mm: thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings Message-Id: <20181015154459.e870c30df5c41966ffb4aed8@linux-foundation.org> In-Reply-To: References: <20180925120326.24392-2-mhocko@kernel.org> <20181005073854.GB6931@suse.de> <20181005232155.GA2298@redhat.com> <20181009094825.GC6931@suse.de> <20181009122745.GN8528@dhcp22.suse.cz> <20181009130034.GD6931@suse.de> <20181009142510.GU8528@dhcp22.suse.cz> <20181009230352.GE9307@redhat.com> X-Mailer: Sylpheed 3.6.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 15 Oct 2018 15:30:17 -0700 (PDT) David Rientjes wrote: > At the risk of beating a dead horse that has already been beaten, what are > the plans for this patch when the merge window opens? I'll hold onto it until we've settled on something. Worst case, Andrea's original is easily backportable. > It would be rather > unfortunate for us to start incurring a 14% increase in access latency and > 40% increase in fault latency. Yes. > Would it be possible to test with my > patch[*] that does not try reclaim to address the thrashing issue? Yes please. And have you been able to test it with the sort of workloads which Andrea is attempting to address?