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[Qemu-devel] [RFC PATCH v2 00/10] virtio-scsi: Dataplane on single iothr
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [RFC PATCH v2 00/10] virtio-scsi: Dataplane on single iothread |
Date: |
Wed, 6 Aug 2014 13:34:58 +0800 |
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
--
2.0.3
- [Qemu-devel] [RFC PATCH v2 00/10] virtio-scsi: Dataplane on single iothread,
Fam Zheng <=
- [Qemu-devel] [RFC PATCH v2 01/10] virtio: Compile vring code unconditionally, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 02/10] virtio-scsi: Split virtio_scsi_handle_cmd_req from virtio_scsi_handle_cmd, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 03/10] virtio-scsi: Split virtio_scsi_handle_ctrl_req from virtio_scsi_handle_ctrl, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 05/10] virtio-scsi: Make virtio_scsi_init_req public, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 04/10] virtio-scsi: Add VirtIOSCSIVring in VirtIOSCSIReq, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 06/10] virtio-scsi: Make virtio_scsi_free_req public, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 07/10] virtio-scsi: Make virtio_scsi_push_event public, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 08/10] virtio-scsi: Add 'iothread' property to virtio-scsi-pci, Fam Zheng, 2014/08/06
- [Qemu-devel] [RFC PATCH v2 09/10] virtio-scsi-dataplane: Code to run virtio-scsi on iothread, Fam Zheng, 2014/08/06