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authorMing Lei <ming.lei@canonical.com>2014-06-26 17:41:47 +0800
committerJens Axboe <axboe@fb.com>2014-07-01 10:51:01 -0600
commitcb553215d5d277d4838d7d6b7722e964bcf5ca1f (patch)
tree535928c09532f94a15e68035745059e374a4150f /drivers/block/virtio_blk.c
parentd15156138dad40205c9fdd9abe85c9e1479ae272 (diff)
downloadop-kernel-dev-cb553215d5d277d4838d7d6b7722e964bcf5ca1f.zip
op-kernel-dev-cb553215d5d277d4838d7d6b7722e964bcf5ca1f.tar.gz
include/uapi/linux/virtio_blk.h: introduce feature of VIRTIO_BLK_F_MQ
Current virtio-blk spec only supports one virtual queue for transfering data between VM and host, and inside VM all kinds of operations on the virtual queue needs to hold one lock, so cause below problems: - bad scalability - bad throughput This patch requests to introduce feature of VIRTIO_BLK_F_MQ so that more than one virtual queues can be used to virtio-blk device, then above problems can be solved or eased. Signed-off-by: Ming Lei <ming.lei@canonical.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/virtio_blk.c')
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