kernel/linux.git/tools/virtio, branch v4.9.4

tools/virtio: fix READ_ONCE()

2017-01-15T12:42:56+00:00

commit 5da889c795b1fbefc9d8f058b54717ab8ab17891 upstream. The virtio tools implementation of READ_ONCE() has a single parameter called 'var', but erroneously refers to 'val' for its cast, and thus won't work unless there's a variable of the correct type that happens to be called 'var'. Fix this with s/var/val/, making READ_ONCE() work as expected regardless. Fixes: a7c490333df3cff5 ("tools/virtio: use virt_xxx barriers") Signed-off-by: Mark Rutland Cc: Jason Wang Cc: Michael S. Tsirkin Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Jason Wang Signed-off-by: Greg Kroah-Hartman

ringtest: poll for new buffers once before updating event index

2016-10-30T22:21:43+00:00

Updating the event index has a memory barrier and causes more work on the other side to actually signal the event. It is unnecessary if a new buffer has already appeared on the ring, so poll once before doing the update. The effect of this on the 0.9 ring implementation is pretty much invisible, but on the new-style ring it provides a consistent 3% performance improvement. Signed-off-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin

ringtest: commonize implementation of poll_avail/poll_used

2016-10-30T22:21:43+00:00

Provide new primitives used_empty/avail_empty and build poll_avail/poll_used on top of it. Signed-off-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin

ringtest: use link-time optimization

2016-10-30T22:21:42+00:00

By using -flto and -fwhole-program, all functions from the ring implementation can be treated as static and possibly inlined. Force this to happen through the GCC flatten attribute. Signed-off-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin

tools/virtio: add dma stubs

2016-08-15T02:05:51+00:00

Fixes build after recent IOMMU-related changes, mustly by adding more stubs. Signed-off-by: Michael S. Tsirkin

ringtest: test build fix

2016-08-15T02:01:23+00:00

Recent changes to ptr_ring broke the ringtest which lacks a likely() stub. Fix it up. Fixes: 982fb490c298896d15e9323a882f34a57c11ff56 ("ptr_ring: support zero length ring") Signed-off-by: Michael S. Tsirkin

ptr_ring: support resizing multiple queues

2016-07-01T09:32:17+00:00

Sometimes, we need support resizing multiple queues at once. This is because it was not easy to recover to recover from a partial failure of multiple queues resizing. Signed-off-by: Michael S. Tsirkin Signed-off-by: Jason Wang Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2016-06-30T09:03:36+00:00

Several cases of overlapping changes, except the packet scheduler conflicts which deal with the addition of the free list parameter to qdisc_enqueue(). Signed-off-by: David S. Miller

ptr_ring: ring test

2016-06-15T20:58:27+00:00

Add ringtest based unit test for ptr ring. Signed-off-by: Michael S. Tsirkin Signed-off-by: David S. Miller

tools/virtio: add noring tool

2016-06-06T10:00:11+00:00

Useful to measure testing framework overhead. Signed-off-by: Michael S. Tsirkin