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| author | Rusty Russell <rusty@rustcorp.com.au> | 2012-01-12 15:44:43 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2012-01-12 15:44:43 +1030 |
| commit | 41f0377f73039ca6fe97a469d1941a89cd9757f1 (patch) | |
| tree | 380814eb3ad8092069c784539b5b88f8a9506240 /include/linux | |
| parent | f96fde41f7f9af6cf20f6a1919f5d9670f84d574 (diff) | |
| download | lwn-41f0377f73039ca6fe97a469d1941a89cd9757f1.tar.gz lwn-41f0377f73039ca6fe97a469d1941a89cd9757f1.zip | |
virtio: support unlocked queue kick
Based on patch by Christoph for virtio_blk speedup:
Split virtqueue_kick to be able to do the actual notification
outside the lock protecting the virtqueue. This patch was
originally done by Stefan Hajnoczi, but I can't find the
original one anymore and had to recreated it from memory.
Pointers to the original or corrections for the commit message
are welcome.
Stefan's patch was here:
https://github.com/stefanha/linux/commit/a6d06644e3a58e57a774e77d7dc34c4a5a2e7496
http://www.spinics.net/lists/linux-virtualization/msg14616.html
Third time's the charm!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/virtio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index ec1706e7df50..31fe3a62874b 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -34,6 +34,10 @@ int virtqueue_add_buf(struct virtqueue *vq, void virtqueue_kick(struct virtqueue *vq); +bool virtqueue_kick_prepare(struct virtqueue *vq); + +void virtqueue_notify(struct virtqueue *vq); + void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len); void virtqueue_disable_cb(struct virtqueue *vq); |