Re: [Qemu-devel] [PATCH 0/5] vhost-scsi: Add support for host virtualized target

[Asias He <asias@redhat.com>]

Hello Nicholas,

On 09/07/2012 02:48 PM, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <nab@linux-iscsi.org>
> 
> Hello Anthony & Co,
> 
> This is the fourth installment to add host virtualized target support for
> the mainline tcm_vhost fabric driver using Linux v3.6-rc into QEMU 1.3.0-rc.
> 
> The series is available directly from the following git branch:
> 
>    git://git.kernel.org/pub/scm/virt/kvm/nab/qemu-kvm.git vhost-scsi-for-1.3
> 
> Note the code is cut against yesterday's QEMU head, and dispite the name
> of the tree is based upon mainline qemu.org git code + has thus far been
> running overnight with > 100K IOPs small block 4k workloads using v3.6-rc2+
> based target code with RAMDISK_DR backstores.

Are you still seeing the performance degradation discussed in the thread

 "vhost-scsi port to v1.1.0 + MSI-X performance regression"

?

> Other than some minor fuzz between jumping from QEMU 1.2.0 -> 1.2.50, this
> series is functionally identical to what's been posted for vhost-scsi RFC-v3
> to qemu-devel.
> 
> Please consider applying these patches for an initial vhost-scsi merge into
> QEMU 1.3.0-rc code, or let us know what else you'd like to see addressed for
> this series to in order to merge.
> 
> Thank you!
> 
> --nab
> 
> Nicholas Bellinger (2):
>   monitor: Rename+move net_handle_fd_param -> monitor_handle_fd_param
>   virtio-scsi: Set max_target=0 during vhost-scsi operation
> 
> Stefan Hajnoczi (3):
>   vhost: Pass device path to vhost_dev_init()
>   vhost-scsi: add -vhost-scsi host device for use with tcm-vhost
>   virtio-scsi: Add start/stop functionality for vhost-scsi
> 
>  configure            |   10 +++
>  hw/Makefile.objs     |    1 +
>  hw/qdev-properties.c |   41 +++++++++++
>  hw/vhost-scsi.c      |  190 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  hw/vhost-scsi.h      |   62 ++++++++++++++++
>  hw/vhost.c           |    5 +-
>  hw/vhost.h           |    3 +-
>  hw/vhost_net.c       |    2 +-
>  hw/virtio-pci.c      |    2 +
>  hw/virtio-scsi.c     |   55 ++++++++++++++-
>  hw/virtio-scsi.h     |    1 +
>  monitor.c            |   18 +++++
>  monitor.h            |    1 +
>  net.c                |   18 -----
>  net.h                |    2 -
>  net/socket.c         |    2 +-
>  net/tap.c            |    4 +-
>  qemu-common.h        |    1 +
>  qemu-config.c        |   19 +++++
>  qemu-options.hx      |    4 +
>  vl.c                 |   18 +++++
>  21 files changed, 431 insertions(+), 28 deletions(-)
>  create mode 100644 hw/vhost-scsi.c
>  create mode 100644 hw/vhost-scsi.h
> 


-- 
Asias