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SubjectRe: [PATCH 0/1] vhost: add vhost_blk driver
Sure! It needs a new QEMU driver (vhost-blk-pci), I'm preparing it to
be sent out.
On Fri, Nov 2, 2018 at 2:26 PM Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Fri, Nov 02, 2018 at 06:21:22PM +0000, Vitaly Mayatskikh wrote:
> > vhost_blk is a host-side kernel mode accelerator for virtio-blk. The
> > driver allows VM to reach a near bare-metal disk performance. See IOPS
> > numbers below (fio --rw=randread --bs=4k).
> >
> > This implementation uses kiocb interface. It is slightly slower than
> > going directly through bio, but is simpler and also works with disk
> > images placed on a file system.
> >
> > # fio num-jobs
> > # A: bare metal over block
> > # B: bare metal over file
> > # C: virtio-blk over block
> > # D: virtio-blk over file
> > # E: vhost-blk bio over block
> > # F: vhost-blk kiocb over block
> > # G: vhost-blk kiocb over file
> > #
> > # A B C D E F G
> >
> > 1 171k 151k 148k 151k 195k 187k 175k
> > 2 328k 302k 249k 241k 349k 334k 296k
> > 3 479k 437k 179k 174k 501k 464k 404k
> > 4 622k 568k 143k 183k 620k 580k 492k
> > 5 755k 697k 136k 128k 737k 693k 579k
> > 6 887k 808k 131k 120k 830k 782k 640k
> > 7 1004k 926k 126k 131k 926k 863k 693k
> > 8 1099k 1015k 117k 115k 1001k 931k 712k
> > 9 1194k 1119k 115k 111k 1055k 991k 711k
> > 10 1278k 1207k 109k 114k 1130k 1046k 695k
> > 11 1345k 1280k 110k 108k 1119k 1091k 663k
> > 12 1411k 1356k 104k 106k 1201k 1142k 629k
> > 13 1466k 1423k 106k 106k 1260k 1170k 607k
> > 14 1517k 1486k 103k 106k 1296k 1179k 589k
> > 15 1552k 1543k 102k 102k 1322k 1191k 571k
> > 16 1480k 1506k 101k 102k 1346k 1202k 566k
> >
> > Vitaly Mayatskikh (1):
> > Add vhost_blk driver
>
>
> Thanks!
> Before merging this, I'd like to get some acks from userspace that it's
> actually going to be used - e.g. QEMU block maintainers.
>
> > drivers/vhost/Kconfig | 13 ++
> > drivers/vhost/Makefile | 3 +
> > drivers/vhost/blk.c | 510 +++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 526 insertions(+)
> > create mode 100644 drivers/vhost/blk.c
> >
> > --
> > 2.17.1



--
wbr, Vitaly

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