From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754799AbeDYOsB (ORCPT ); Wed, 25 Apr 2018 10:48:01 -0400 Received: from mx1.redhat.com ([209.132.183.28]:3635 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753508AbeDYOr6 (ORCPT ); Wed, 25 Apr 2018 10:47:58 -0400 Date: Wed, 25 Apr 2018 10:47:56 -0400 (EDT) From: Pankaj Gupta To: Dan Williams Cc: Linux Kernel Mailing List , KVM list , Qemu Developers , linux-nvdimm , Linux MM , Jan Kara , Stefan Hajnoczi , Rik van Riel , Haozhong Zhang , Nitesh Narayan Lal , Kevin Wolf , Paolo Bonzini , Ross Zwisler , David Hildenbrand , Xiao Guangrong , Christoph Hellwig , Marcel Apfelbaum , "Michael S. Tsirkin" , niteshnarayanlal@hotmail.com, Igor Mammedov , lcapitulino@redhat.com Message-ID: <458087373.22645020.1524667676533.JavaMail.zimbra@redhat.com> In-Reply-To: References: <20180425112415.12327-1-pagupta@redhat.com> <20180425112415.12327-3-pagupta@redhat.com> Subject: Re: [RFC v2 2/2] pmem: device flush over VIRTIO MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.67.116.111, 10.4.195.23] Thread-Topic: pmem: device flush over VIRTIO Thread-Index: RGAJX2p9n07JgwlroFp9vISyZdXRBQ== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > On Wed, Apr 25, 2018 at 4:24 AM, Pankaj Gupta wrote: > > This patch adds functionality to perform > > flush from guest to hosy over VIRTIO > > when 'ND_REGION_VIRTIO'flag is set on > > nd_negion. Flag is set by 'virtio-pmem' > > driver. > > > > Signed-off-by: Pankaj Gupta > > --- > > drivers/nvdimm/region_devs.c | 7 +++++++ > > 1 file changed, 7 insertions(+) > > > > diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c > > index a612be6..6c6454e 100644 > > --- a/drivers/nvdimm/region_devs.c > > +++ b/drivers/nvdimm/region_devs.c > > @@ -20,6 +20,7 @@ > > #include > > #include "nd-core.h" > > #include "nd.h" > > +#include > > > > /* > > * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is > > @@ -1074,6 +1075,12 @@ void nvdimm_flush(struct nd_region *nd_region) > > struct nd_region_data *ndrd = dev_get_drvdata(&nd_region->dev); > > int i, idx; > > > > + /* call PV device flush */ > > + if (test_bit(ND_REGION_VIRTIO, &nd_region->flags)) { > > + virtio_pmem_flush(&nd_region->dev); > > + return; > > + } > > + > > I'd rather introduce a ->flush() operation hanging off of 'struct > nd_region' so that this multiplexing can be a static setting. Sure! will make the change. Thanks, Pankaj