From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:56558 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730157AbfFMDmZ (ORCPT ); Wed, 12 Jun 2019 23:42:25 -0400 Date: Wed, 12 Jun 2019 23:42:18 -0400 (EDT) From: Pankaj Gupta Message-ID: <165204827.34945594.1560397338620.JavaMail.zimbra@redhat.com> In-Reply-To: <20190612162012.06b4af7f.cohuck@redhat.com> References: <20190612124527.3763-1-pagupta@redhat.com> <20190612124527.3763-3-pagupta@redhat.com> <20190612162012.06b4af7f.cohuck@redhat.com> Subject: Re: [Qemu-devel] [PATCH v13 2/7] virtio-pmem: Add virtio pmem driver MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: Cornelia Huck Cc: rdunlap@infradead.org, jack@suse.cz, kvm@vger.kernel.org, mst@redhat.com, jasowang@redhat.com, david@fromorbit.com, qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org, dm-devel@redhat.com, adilger kernel , zwisler@kernel.org, aarcange@redhat.com, dave jiang , jstaron@google.com, linux-nvdimm@lists.01.org, vishal l verma , david@redhat.com, willy@infradead.org, hch@infradead.org, linux-acpi@vger.kernel.org, jmoyer@redhat.com, linux-ext4@vger.kernel.org, lenb@kernel.org, kilobyte@angband.pl, riel@surriel.com, yuval shaia , stefanha@redhat.com, pbonzini@redhat.com, dan j williams , lcapitulino@redhat.com, kwolf@redhat.com, nilal@redhat.com, tytso@mit.edu, xiaoguangrong eric , snitzer@redhat.com, darrick wong , rjw@rjwysocki.net, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, imammedo@redhat.com > > > This patch adds virtio-pmem driver for KVM guest. > > > > Guest reads the persistent memory range information from > > Qemu over VIRTIO and registers it on nvdimm_bus. It also > > creates a nd_region object with the persistent memory > > range information so that existing 'nvdimm/pmem' driver > > can reserve this into system memory map. This way > > 'virtio-pmem' driver uses existing functionality of pmem > > driver to register persistent memory compatible for DAX > > capable filesystems. > > > > This also provides function to perform guest flush over > > VIRTIO from 'pmem' driver when userspace performs flush > > on DAX memory range. > > > > Signed-off-by: Pankaj Gupta > > Reviewed-by: Yuval Shaia > > Acked-by: Michael S. Tsirkin > > Acked-by: Jakub Staron > > Tested-by: Jakub Staron > > --- > > drivers/nvdimm/Makefile | 1 + > > drivers/nvdimm/nd_virtio.c | 125 +++++++++++++++++++++++++++++++ > > drivers/nvdimm/virtio_pmem.c | 122 ++++++++++++++++++++++++++++++ > > drivers/nvdimm/virtio_pmem.h | 55 ++++++++++++++ > > drivers/virtio/Kconfig | 11 +++ > > include/uapi/linux/virtio_ids.h | 1 + > > include/uapi/linux/virtio_pmem.h | 35 +++++++++ > > 7 files changed, 350 insertions(+) > > create mode 100644 drivers/nvdimm/nd_virtio.c > > create mode 100644 drivers/nvdimm/virtio_pmem.c > > create mode 100644 drivers/nvdimm/virtio_pmem.h > > create mode 100644 include/uapi/linux/virtio_pmem.h > > Reviewed-by: Cornelia Huck Thank you Cornelia for the review. Best regards, Pankaj > >