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[209.132.180.67]) by mx.google.com with ESMTP id 79si16118070pga.440.2018.04.26.10.25.57; Thu, 26 Apr 2018 10:26:12 -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 S1756914AbeDZRYk (ORCPT + 99 others); Thu, 26 Apr 2018 13:24:40 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37056 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753282AbeDZRYf (ORCPT ); Thu, 26 Apr 2018 13:24:35 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9E452402613B; Thu, 26 Apr 2018 17:24:33 +0000 (UTC) Received: from segfault.boston.devel.redhat.com (segfault.boston.devel.redhat.com [10.19.60.26]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 48F5F8445F; Thu, 26 Apr 2018 17:24:18 +0000 (UTC) From: Jeff Moyer To: Pankaj Gupta Cc: Dan Williams , Jan Kara , KVM list , David Hildenbrand , linux-nvdimm , Ross Zwisler , Qemu Developers , lcapitulino@redhat.com, Linux MM , niteshnarayanlal@hotmail.com, "Michael S. Tsirkin" , Christoph Hellwig , Marcel Apfelbaum , Nitesh Narayan Lal , Haozhong Zhang , Rik van Riel , Stefan Hajnoczi , Paolo Bonzini , Kevin Wolf , Xiao Guangrong , Linux Kernel Mailing List , Igor Mammedov Subject: Re: [Qemu-devel] [RFC v2 1/2] virtio: add pmem driver References: <20180425112415.12327-1-pagupta@redhat.com> <20180425112415.12327-2-pagupta@redhat.com> <1499190564.23017177.1524762938762.JavaMail.zimbra@redhat.com> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 X-PCLoadLetter: What the f**k does that mean? Date: Thu, 26 Apr 2018 13:24:17 -0400 In-Reply-To: <1499190564.23017177.1524762938762.JavaMail.zimbra@redhat.com> (Pankaj Gupta's message of "Thu, 26 Apr 2018 13:15:38 -0400 (EDT)") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Thu, 26 Apr 2018 17:24:33 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Thu, 26 Apr 2018 17:24:33 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jmoyer@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pankaj Gupta writes: >> Ideally, qemu (seabios?) would advertise a platform capabilities >> sub-table that doesn't fill in the flush bits. > > Could you please elaborate on this, how its related to disabling > MAP_SYNC? We are not doing entire nvdimm device emulation. My mistake. If you're not providing an NFIT, then you can ignore this comment. I'll have a closer look at your patches next week. -Jeff