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Re: [Qemu-devel] [PATCH v13 2/7] virtio-pmem: Add virtio pmem driver
From: |
Pankaj Gupta |
Subject: |
Re: [Qemu-devel] [PATCH v13 2/7] virtio-pmem: Add virtio pmem driver |
Date: |
Wed, 12 Jun 2019 23:42:18 -0400 (EDT) |
>
> > 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 <address@hidden>
> > Reviewed-by: Yuval Shaia <address@hidden>
> > Acked-by: Michael S. Tsirkin <address@hidden>
> > Acked-by: Jakub Staron <address@hidden>
> > Tested-by: Jakub Staron <address@hidden>
> > ---
> > 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 <address@hidden>
Thank you Cornelia for the review.
Best regards,
Pankaj
>
>
- [Qemu-devel] [PATCH v13 0/7] virtio pmem driver, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 1/7] libnvdimm: nd_region flush callback support, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 2/7] virtio-pmem: Add virtio pmem driver, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 3/7] libnvdimm: add dax_dev sync flag, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 4/7] dm: enable synchronous dax, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 5/7] dax: check synchronous mapping is supported, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 6/7] ext4: disable map_sync for async flush, Pankaj Gupta, 2019/06/12
- [Qemu-devel] [PATCH v13 7/7] xfs: disable map_sync for async flush, Pankaj Gupta, 2019/06/12