Jason Wang e3b56cdd43 vhost: try avoiding avail index access when getting descriptor ...

If last avail idx is not equal to cached avail idx, we're sure there's
still available buffers in the virtqueue so there's no need to re-read
avail idx. So let's skip this to avoid unnecessary userspace memory
access and memory barrier. Pktgen test show about 3% improvement on rx
pps.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2017-02-27 20:37:27 +02:00

..

Kconfig

vhost: split out vringh Kconfig

2016-08-02 16:54:28 +03:00

Kconfig.vringh

vhost: split out vringh Kconfig

2016-08-02 16:54:28 +03:00

Makefile

VSOCK: Add Makefile and Kconfig

2016-08-02 02:57:30 +03:00

net.c

locking/core: Remove cpu_relax_lowlatency() users

2016-11-16 10:15:10 +01:00

scsi.c

vhost/scsi: silence uninitialized variable warning

2017-01-19 23:46:30 +02:00

test.c

Merge 4.8-rc5 into char-misc-next

2016-09-05 08:04:07 +02:00

test.h

vhost test module

2010-12-09 16:00:21 +02:00

vhost.c

vhost: try avoiding avail index access when getting descriptor

2017-02-27 20:37:27 +02:00

vhost.h

vhost: cache used event for better performance

2016-12-16 00:12:50 +02:00

vringh.c

vringh: kill off ACCESS_ONCE()

2016-12-16 00:13:36 +02:00

vsock.c

vhost/vsock: handle vhost_vq_init_access() error

2017-01-25 00:33:10 +02:00