linux-stable.git/drivers/vhost/vhost.c, branch v3.13

vhost: wake up worker outside spin_lock

2013-09-17T06:21:32+00:00

the wake_up_process func is included by spin_lock/unlock in
vhost_work_queue,
but it could be done outside the spin_lock.
I have test it with kernel 3.0.27 and guest suse11-sp2 using iperf,
the num as below.
                  original                 modified
thread_num  tp(Gbps)   vhost(%)  |  tp(Gbps)     vhost(%)
1           9.59        28.82    |   9.59        27.49
8           9.61        32.92    |   9.62        26.77
64          9.58        46.48    |   9.55        38.99
256         9.6         63.7     |   9.6         52.59

Signed-off-by: Chuanyu Qin 
Signed-off-by: Michael S. Tsirkin

vhost: switch to use vhost_add_used_n()

2013-09-04T02:46:57+00:00

Let vhost_add_used() to use vhost_add_used_n() to reduce the code
duplication. To avoid the overhead brought by __copy_to_user(). We will use
put_user() when one used need to be added.

Signed-off-by: Jason Wang 
Signed-off-by: David S. Miller

vhost: Include linux/uio.h instead of linux/socket.h

2013-08-20T22:05:04+00:00

memcpy_fromiovec is moved from net/core/iovec.c to lib/iovec.c.
linux/uio.h provides the declaration for memcpy_fromiovec.

Include linux/uio.h instead of inux/socket.h for it.

Signed-off-by: Asias He 
Acked-by: Michael S. Tsirkin 
Signed-off-by: David S. Miller

vhost: Make vhost a separate module

2013-07-07T14:33:44+00:00

Currently, vhost-net and vhost-scsi are sharing the vhost core code.
However, vhost-scsi shares the code by including the vhost.c file
directly.

Making vhost a separate module makes it is easier to share code with
other vhost devices.

Signed-off-by: Asias He 
Signed-off-by: Michael S. Tsirkin

vhost: Simplify dev->vqs[i] access

2013-07-07T11:38:26+00:00

Signed-off-by: Asias He 
Signed-off-by: Michael S. Tsirkin

vhost: check owner before we overwrite ubuf_info

2013-06-11T09:46:21+00:00

If device has an owner, we shouldn't touch ubuf_info
since it might be in use.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: David S. Miller

vhost: drop virtio_net.h dependency

2013-05-06T11:04:06+00:00

There's no net specific code in vhost.c anymore,
don't include the virtio_net.h header.

Signed-off-by: Michael S. Tsirkin

vhost: Export vhost_dev_set_owner

2013-05-06T09:57:54+00:00

Signed-off-by: Asias He 
Signed-off-by: Michael S. Tsirkin

vhost: fix error handling in RESET_OWNER ioctl

2013-05-01T07:02:54+00:00

RESET_OWNER ioctl would leave the fd in a bad state if
memory allocation failed: device is stopped
but owner is not reset. Make state changes
after allocating memory, such that a failed
ioctl has no effect.

Signed-off-by: Michael S. Tsirkin

vhost: move per-vq net specific fields out to net

2013-05-01T07:02:53+00:00

This will remove the need for vhost scsi to pull
in virtio-net.h.

Signed-off-by: Michael S. Tsirkin