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=-2.5 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT 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 6D92BC43A1D for ; Thu, 12 Jul 2018 13:12:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C1A0208E9 for ; Thu, 12 Jul 2018 13:12:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C1A0208E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.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 S1732248AbeGLNWE (ORCPT ); Thu, 12 Jul 2018 09:22:04 -0400 Received: from mx2.suse.de ([195.135.220.15]:45144 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726762AbeGLNWE (ORCPT ); Thu, 12 Jul 2018 09:22:04 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id D868CAE9B; Thu, 12 Jul 2018 13:12:31 +0000 (UTC) Date: Thu, 12 Jul 2018 15:12:29 +0200 From: Michal Hocko To: Linus Torvalds Cc: wei.w.wang@intel.com, virtio-dev@lists.oasis-open.org, Linux Kernel Mailing List , virtualization , KVM list , linux-mm , "Michael S. Tsirkin" , Andrew Morton , Paolo Bonzini , liliang.opensource@gmail.com, yang.zhang.wz@gmail.com, quan.xu0@gmail.com, nilal@redhat.com, Rik van Riel , peterx@redhat.com Subject: Re: [PATCH v35 1/5] mm: support to get hints of free page blocks Message-ID: <20180712131229.GM32648@dhcp22.suse.cz> References: <1531215067-35472-1-git-send-email-wei.w.wang@intel.com> <1531215067-35472-2-git-send-email-wei.w.wang@intel.com> <5B455D50.90902@intel.com> <20180711092152.GE20050@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [Hmm this one somehow got stuck in my outgoing emails] On Wed 11-07-18 09:23:54, Linus Torvalds wrote: [...] > So I'm open to new interfaces. I just want those new interfaces to > make sense, and be low latency and simple for the VM to do. I'm > objecting to the incredibly baroque and heavy-weight one that can > return near-infinite amounts of memory. Mel was suggesting a bulk page allocator a year ago [1]. I can see only slab bulk api so I am not sure what happened with that work. Anyway I think that starting with what we have right now is much more appropriate than over design this thing from the early beginning. [1] http://lkml.kernel.org/r/20170109163518.6001-5-mgorman@techsingularity.net -- Michal Hocko SUSE Labs