Package: linux Version: 3.2.23-1 Severity: wishlist Virtio SCSI a new driver/transport for block storage for paravirtualized systems. It replaces the older & limited in many ways virtio-blk and is implemented by basically passing through SCSI over virtio. Hence devices appear as regular SCSI devices like /dev/sda instead of /dev/vda, SCSI passthrough can be easily implemented, multiple LUNs can be supported without provisioning a PCI card for each etc.
http://wiki.qemu.org/Features/VirtioSCSI On the host side, virtio-scsi is supported by qemu(-kvm) >= 1.1 (in wheezy) or by a kernel vhost driver for LIO which is still experimental and merged in v3.6 as a staging driver. virtio-scsi is the guest driver for supporting such devices, i.e. it's needed in a guest system configured with one or more virtio-scsi devices. It was first included in Linux v3.4 with some features/bugfixes in v3.6: 59057fb [SCSI] virtio-scsi: Add vdrv->scan for post VIRTIO_CONFIG_S_DRIVER_OK LU 365a715 [SCSI] virtio-scsi: hotplug support for virtio-scsi 2bd37f0 [SCSI] virtio-scsi: split scatterlist per target bce750b [SCSI] virtio-scsi: release sg_lock after add_buf 139fe45 [SCSI] virtio-scsi: split locking per vq b5ee8f2 [SCSI] virtio-scsi: unlock during kick e4594bb [SCSI] virtio_scsi: fix TMF use-after-free 4fe74b1 [SCSI] virtio-scsi: SCSI driver for QEMU based virtual machines (the last two are v3.4, the rest are v3.6) I believe it's important for wheezy to support being a guest in such configurations, as I expect virtio-scsi to be gradually adopted during the wheezy lifecycle. The driver is mostly self-contained and straightforward to backport (I wouldn't ask otherwise): The above commits cherry-picked against v3.2.28 result in the following: drivers/scsi/Kconfig | 8 + drivers/scsi/Makefile | 1 + drivers/scsi/virtio_scsi.c | 803 +++++++++++++++++++++++++++++++++ drivers/virtio/virtio.c | 5 +- include/linux/virtio.h | 1 + include/linux/virtio_ids.h | 1 + include/linux/virtio_scsi.h | 123 +++++ 7 files changed, 941 insertions(+), 1 deletion(-) The v3.6 could be risky, considering they haven't been released yet and haven't seen much testing. If you prefer merging just v3.4's 4fe74b1/e4594bb instead, the stat is: drivers/scsi/Kconfig | 8 + drivers/scsi/Makefile | 1 + drivers/scsi/virtio_scsi.c | 596 +++++++++++++++++++++++++++++++++ include/linux/virtio_ids.h | 1 + include/linux/virtio_scsi.h | 114 +++++++ 5 files changed, 720 insertions(+) Thanks, Faidon -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120904063255.ga19...@tty.gr
