From: Pankaj Gupta <pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: David Hildenbrand <david-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: kwolf-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
nilal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
jack-AlSwsSmVLrQ@public.gmane.org,
xiaoguangrong eric
<xiaoguangrong.eric-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
riel-ebMLmSuQjDVBDgjK7y7TUQ@public.gmane.org,
linux-nvdimm-y27Ovi1pjclAfugRpC6u6w@public.gmane.org,
mst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
ross zwisler
<ross.zwisler-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org,
hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
stefanha-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
niteshnarayanlal-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org,
imammedo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
lcapitulino-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
Subject: Re: [Qemu-devel] [RFC v3 0/2] kvm "fake DAX" device flushing
Date: Tue, 28 Aug 2018 08:39:53 -0400 (EDT) [thread overview]
Message-ID: <16583366.7193885.1535459993521.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <1328e543-0276-8f33-1744-8baa053023c4-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Hi David,
> > for review. This patchset has two parts:
> >
> > - Guest virtio-pmem driver
> > Guest driver reads persistent memory range from paravirt device
> > and registers with 'nvdimm_bus'. 'nvdimm/pmem' driver uses this
> > information to allocate persistent memory range. Also, we have
> > implemented guest side of VIRTIO flushing interface.
> >
> > - Qemu virtio-pmem device
> > It exposes a persistent memory range to KVM guest which at host
> > side is file backed memory and works as persistent memory device.
> > In addition to this it provides virtio device handling of flushing
> > interface. KVM guest performs Qemu side asynchronous sync using
> > this interface.
> >
> > Changes from RFC v2:
> > - Add flush function in the nd_region in place of switching
> > on a flag - Dan & Stefan
> > - Add flush completion function with proper locking and wait
> > for host side flush completion - Stefan & Dan
> > - Keep userspace API in uapi header file - Stefan, MST
> > - Use LE fields & New device id - MST
> > - Indentation & spacing suggestions - MST & Eric
> > - Remove extra header files & add licensing - Stefan
> >
> > Changes from RFC v1:
> > - Reuse existing 'pmem' code for registering persistent
> > memory and other operations instead of creating an entirely
> > new block driver.
> > - Use VIRTIO driver to register memory information with
> > nvdimm_bus and create region_type accordingly.
> > - Call VIRTIO flush from existing pmem driver.
> >
> > Details of project idea for 'fake DAX' flushing interface is
> > shared [2] & [3].
> >
> > Pankaj Gupta (2):
> > Add virtio-pmem guest driver
> > pmem: device flush over VIRTIO
> >
> > [1] https://marc.info/?l=linux-mm&m=150782346802290&w=2
> > [2] https://www.spinics.net/lists/kvm/msg149761.html
> > [3] https://www.spinics.net/lists/kvm/msg153095.html
> >
> > drivers/nvdimm/nd.h | 1
> > drivers/nvdimm/pmem.c | 4
> > drivers/nvdimm/region_devs.c | 24 +++-
> > drivers/virtio/Kconfig | 9 +
> > drivers/virtio/Makefile | 1
> > drivers/virtio/virtio_pmem.c | 190
> > +++++++++++++++++++++++++++++++++++++++
> > include/linux/libnvdimm.h | 5 -
> > include/linux/virtio_pmem.h | 44 +++++++++
> > include/uapi/linux/virtio_ids.h | 1
> > include/uapi/linux/virtio_pmem.h | 40 ++++++++
> > 10 files changed, 310 insertions(+), 9 deletions(-)
> >
>
> Hi Pankaj,
>
> do you have a branch for the QEMU part somewhere available? I want to
> see how this works with MemoryDevice changes.
o.k I will update the guest virtio-pmem and Qemu current changes
and share with you. BTW previous version is here:
https://marc.info/?l=kvm&m=153146839627143&w=2
Thanks,
Pankaj
>
> --
>
> Thanks,
>
> David / dhildenb
>
>
next prev parent reply other threads:[~2018-08-28 12:39 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-13 7:52 [RFC v3 0/2] kvm "fake DAX" device flushing Pankaj Gupta
2018-07-13 7:52 ` [RFC v3 1/2] libnvdimm: Add flush callback for virtio pmem Pankaj Gupta
2018-07-13 20:35 ` Luiz Capitulino
2018-07-16 8:13 ` Pankaj Gupta
[not found] ` <20180713075232.9575-1-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-13 7:52 ` [RFC v3 2/2] virtio-pmem: Add virtio pmem driver Pankaj Gupta
[not found] ` <20180713075232.9575-3-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-13 20:38 ` Luiz Capitulino
2018-07-16 11:46 ` [Qemu-devel] " Pankaj Gupta
[not found] ` <633297685.51039804.1531741590092.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-16 14:03 ` Luiz Capitulino
2018-07-16 15:11 ` Pankaj Gupta
2018-07-17 13:11 ` Stefan Hajnoczi
[not found] ` <20180717131156.GA13498-lxVrvc10SDRcolVlb+j0YCZi+YwRKgec@public.gmane.org>
2018-07-18 7:05 ` Pankaj Gupta
2018-08-28 12:13 ` [RFC v3 0/2] kvm "fake DAX" device flushing David Hildenbrand
[not found] ` <1328e543-0276-8f33-1744-8baa053023c4-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-08-28 12:39 ` Pankaj Gupta [this message]
2018-07-13 7:52 ` [RFC v3] qemu: Add virtio pmem device Pankaj Gupta
[not found] ` <20180713075232.9575-4-pagupta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-18 12:55 ` Luiz Capitulino
2018-07-19 5:48 ` [Qemu-devel] " Pankaj Gupta
2018-07-19 12:16 ` Stefan Hajnoczi
[not found] ` <20180719121635.GA28107-lxVrvc10SDRcolVlb+j0YCZi+YwRKgec@public.gmane.org>
2018-07-19 12:48 ` Luiz Capitulino
2018-07-19 12:57 ` Luiz Capitulino
2018-07-20 13:04 ` Pankaj Gupta
2018-07-19 13:58 ` David Hildenbrand
[not found] ` <b6ef19f3-7f16-5427-bfed-f352a76e48b7-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-19 15:48 ` Luiz Capitulino
2018-07-20 13:02 ` Pankaj Gupta
[not found] ` <367397176.52317488.1531979293251.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-19 12:39 ` Luiz Capitulino
2018-07-24 16:13 ` Eric Blake
[not found] ` <783786ae-2e85-2376-448c-1e362c3d4d48-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-25 5:01 ` [Qemu-devel] " Pankaj Gupta
[not found] ` <399916154.53931292.1532494899706.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-25 12:19 ` Eric Blake
[not found] ` <d3fe397a-024d-faf7-8854-bb8e9ea17f53-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-25 12:47 ` Pankaj Gupta
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