| commit | 89d62be9f4fb538db7f919a2be7df2544ffc02c5 | |
| author | Michael S. Tsirkin <mst@redhat.com> | |
| Tue, 18 Dec 2012 12:02:46 +0000 (18 14:02 +0200) | ||
| committer | Michael S. Tsirkin <mst@redhat.com> | |
| Wed, 26 Dec 2012 09:49:29 +0000 (26 11:49 +0200) | ||
| tree | 5a19bad2746869cf396e85f55c196bddf660244b | treesnapshot (tar.gz zip) |
| parent | 70f8ee395afda6d96b15cb9a5b311af7720dded0 | commitdiff |
virtio-pci: don't poll masked vectors
At the moment, when irqfd is in use but a vector is masked,
qemu will poll it and handle vector masks in userspace.
Since almost no one ever looks at the pending bits,
it is better to defer this until pending bits
are actually read.
Implement this optimization using the new poll notifier.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
At the moment, when irqfd is in use but a vector is masked,
qemu will poll it and handle vector masks in userspace.
Since almost no one ever looks at the pending bits,
it is better to defer this until pending bits
are actually read.
Implement this optimization using the new poll notifier.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| hw/virtio-pci.c | diffblobblamehistory |