Hey Rusty,
Here are a few fixes for virtio and virtio_console.
The first patch ensures the data elements of vqs are properly
initialised at allocation-time so that we don't trigger BUG_ONs. I found
this when hot-unplugging ports and there was just one unused buffer.
detach_unused_buffers() kept returning pointers that were invalid. I
didn't catch this earlier as I had the in_vq filled completely.
Patches 2, 4 and 5 can be folded into the series as they are bugfixes
for the functionality present there.
About patch 5: When running a test that transfers a 260M file from the
host to the guest, qemu-kvm.git takes 17m with a single outstanding
buffer in the in_vq vs. 1m when the entire in_vq is filled. This is a
bug in qemu-kvm.git's scheduling, but since it's a big difference and
not much change involved, we could merge this now.
Comments?
If these patches are favourable, I could send you a tarball in private
so that the bugfixes are folded in the series and just patches 1, 3 and
6 are added.
Thanks,
Amit.
Amit Shah (6):
virtio: Initialize vq->data entries to NULL
virtio: console: Ensure no memleaks in case of unused buffers
virtio: console: Add ability to remove module
virtio: console: Error out if we can't allocate buffers for control
queue
virtio: console: Fill ports' entire in_vq with buffers
Add MAINTAINERS entry for virtio_console
MAINTAINERS | 6 ++
drivers/char/virtio_console.c | 132 +++++++++++++++++++++++++++++++---------
drivers/virtio/virtio_ring.c | 5 +-
3 files changed, 112 insertions(+), 31 deletions(-)
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