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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 5D7BCC7618F for ; Tue, 16 Jul 2019 15:04:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 429012173C for ; Tue, 16 Jul 2019 15:04:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387860AbfGPPEv (ORCPT ); Tue, 16 Jul 2019 11:04:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55298 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728513AbfGPPEv (ORCPT ); Tue, 16 Jul 2019 11:04:51 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4AC22C1EB1E4; Tue, 16 Jul 2019 15:04:51 +0000 (UTC) Received: from redhat.com (ovpn-122-108.rdu2.redhat.com [10.10.122.108]) by smtp.corp.redhat.com (Postfix) with SMTP id 82A916013C; Tue, 16 Jul 2019 15:04:30 +0000 (UTC) Date: Tue, 16 Jul 2019 11:04:27 -0400 From: "Michael S. Tsirkin" To: David Hildenbrand Cc: Dave Hansen , Alexander Duyck , nitesh@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, yang.zhang.wz@gmail.com, pagupta@redhat.com, riel@surriel.com, konrad.wilk@oracle.com, lcapitulino@redhat.com, wei.w.wang@intel.com, aarcange@redhat.com, pbonzini@redhat.com, dan.j.williams@intel.com, alexander.h.duyck@linux.intel.com Subject: Re: [PATCH v1 6/6] virtio-balloon: Add support for aerating memory via hinting Message-ID: <20190716110357-mutt-send-email-mst@kernel.org> References: <20190619222922.1231.27432.stgit@localhost.localdomain> <20190619223338.1231.52537.stgit@localhost.localdomain> <20190716055017-mutt-send-email-mst@kernel.org> <3f8b2a76-b2ce-fb73-13d4-22a33fc1eb17@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 16 Jul 2019 15:04:51 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Jul 16, 2019 at 04:17:13PM +0200, David Hildenbrand wrote: > On 16.07.19 16:12, David Hildenbrand wrote: > > On 16.07.19 16:00, Dave Hansen wrote: > >> On 7/16/19 2:55 AM, Michael S. Tsirkin wrote: > >>> The approach here is very close to what on-demand hinting that is > >>> already upstream does. > >> > >> Are you referring to the s390 (and powerpc) stuff that is hidden behind > >> arch_free_page()? > >> > > > > I assume Michael meant "free page reporting". > > > > (https://lwn.net/Articles/759413/) Yes - VIRTIO_BALLOON_F_FREE_PAGE_HINT. > -- > > Thanks, > > David / dhildenb