Il 06/08/2014 07:34, Fam Zheng ha scritto:
Hi all,
This series adds iothread property to virtio-scsi in a way just similar to
virtio-blk, and turns all scsi devices to run on top of it.
Example:
-object iothread,id=iothread-1 \
-device virtio-scsi-pci,id=virtio-scsi-bus-0,iothread=iothread-1 \
-drive file=guest.img,id=scsi-disk-1,if=none,cache=none,aio=native \
-device scsi-disk,lun=1,drive=scsi-disk-1,id=scsi-disk-1
It uses irqfd, ioeventfd and vring in a way just like virtio-blk does now.
Please review the general approach and see if major points are missed in terms
of thread safety and completeness of the moved things from original context to
iothread context.
Note that the used vring is not function complete compared to virtqueue
implementation, because of its lacking of MMIO handling. So this is just an
RFC.
Migration hasn't been looked into yet, either. Assigning multiple iothreads
is
supposed to be worked on top of this as well, but it's not thoroughly planned
yet.
Thanks,
Fam
Fam Zheng (10):
virtio: Compile vring code unconditionally
virtio-scsi: Split virtio_scsi_handle_cmd_req from
virtio_scsi_handle_cmd
virtio-scsi: Split virtio_scsi_handle_ctrl_req from
virtio_scsi_handle_ctrl
virtio-scsi: Add VirtIOSCSIVring in VirtIOSCSIReq
virtio-scsi: Make virtio_scsi_init_req public
virtio-scsi: Make virtio_scsi_free_req public
virtio-scsi: Make virtio_scsi_push_event public
virtio-scsi: Add 'iothread' property to virtio-scsi-pci
virtio-scsi-dataplane: Code to run virtio-scsi on iothread
virtio-scsi: Hook up with dataplane
hw/scsi/Makefile.objs | 2 +-
hw/scsi/virtio-scsi-dataplane.c | 219 +
hw/scsi/virtio-scsi.c | 260
+---
hw/virtio/Makefile.objs | 2 +-
hw/virtio/virtio-pci.c | 2 +
include/hw/virtio/virtio-scsi.h | 65 ++
6 files changed, 450 insertions(+), 100 deletions(-)
create mode 100644 hw/scsi/virtio-scsi-dataplane.c
I'm applying the patches to scsi-next. However, please resubmit the
last two with the review comments addressed. I'm only pushing them so
that we don't both spend time rebasing the branch.
Thanks,
Paolo
Thanks
