Received: by 2002:a25:ad19:0:0:0:0:0 with SMTP id y25csp993180ybi; Tue, 16 Jul 2019 08:07:01 -0700 (PDT) X-Google-Smtp-Source: APXvYqyjRUgxM8lIZeoIcK9+ph2W3wkevWqDofEo1omndBBJPxcxpq23Rc/CwQYd6it0ofQM+g4h X-Received: by 2002:a17:902:3181:: with SMTP id x1mr35491890plb.135.1563289621266; Tue, 16 Jul 2019 08:07:01 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563289621; cv=none; d=google.com; s=arc-20160816; b=YKTSQLT9lMuylr0WxueTT+nXFMoEFEafzlfWPBGES4O0gvWd7ggc/krzGYk+UC7BYN wq7ga+DmVrWzdUkKPhPLyPwi6lM5LTr8dhkn67BHC6dYg6HmIuS2GECgaGpaRTtA6uaA ac37UEimd6bv703qUS6rYX3+jQ5aVAt6ov7Fq1vJWIMHeCpstWCeRrPWrjfFdPVFBohv WzIrn2oO4uDcjgzZC+2HMy1A32mLtsl/5hD4H0lV3mSqxd5xX1emLN1E/q/YrKfaV6Xc 7dqXrdFbKIye2/C5RnTc/sy1dMODnSdKiySbayuEmhWOZ+SxQV7BN5LUo6WXVONm57OW s4SA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date; bh=/wDYTkkza3J7bnZk9wcn1Fsd5fKIxIlkHQ7jUUx0bO8=; b=feWwdJpxMK4ecWids3Z3KFTentniY4NgN1hbSOe4qhJ9DXjJrjYIohFqm5W4yrKQYm SPRFmH2QEks7xPB9sZ3WlyAuLgCIYQfackf25QlH1KYAkwFKowHw47qYOCY2lDxvlxqV 7UHmWMq+IXzLV9iQxzPR+a5zYXpUnvs97RF7D9eTIrKHpdiOZfsGbqxDE2rSrLFebO4r obznO/oOErzemOisKZ3kBWdUVmqek8aVlX/KWr2DrS6htJw04Gm/gN/f7nmWvppgox2s jRcn6wC+GmEBKpOt7SPugHietbUuzno9dG57l/Xgl+upnq8uGxgUOy9IQHiixmSsN7zp y02g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id h32si19471741pld.402.2019.07.16.08.06.44; Tue, 16 Jul 2019 08:07:01 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387922AbfGPPEv (ORCPT + 99 others); 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: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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