linux.git/drivers/vhost/vhost.c, branch v3.11

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

vhost: move vhost-net zerocopy fields to net.c

2013-05-01T07:02:52+00:00

On top of 'vhost: Allow device specific fields per vq', we can move device
specific fields to device virt queue from vhost virt queue.

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

vhost: Allow device specific fields per vq

2013-05-01T07:02:45+00:00

This is useful for any device who wants device specific fields per vq.
For example, tcm_vhost wants a per vq field to track requests which are
in flight on the vq. Also, on top of this we can add patches to move
things like ubufs from vhost.h out to net.c.

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

vhost_net: remove tx polling state

2013-04-11T20:16:22+00:00

After commit 2b8b328b61c799957a456a5a8dab8cc7dea68575 (vhost_net: handle polling
errors when setting backend), we in fact track the polling state through
poll->wqh, so there's no need to duplicate the work with an extra
vhost_net_polling_state. So this patch removes this and make the code simpler.

This patch also removes the all tx starting/stopping code in tx path according
to Michael's suggestion.

Netperf test shows almost the same result in stream test, but gets improvements
on TCP_RR tests (both zerocopy or copy) especially on low load cases.

Tested between multiqueue kvm guest and external host with two direct
connected 82599s.

zerocopy disabled:

sessions|transaction rates|normalize|
before/after/+improvements
1 | 9510.24/11727.29/+23.3%    | 693.54/887.68/+28.0%   |
25| 192931.50/241729.87/+25.3% | 2376.80/2771.70/+16.6% |
50| 277634.64/291905.76/+5%    | 3118.36/3230.11/+3.6%  |

zerocopy enabled:

sessions|transaction rates|normalize|
before/after/+improvements
1 | 7318.33/11929.76/+63.0%    | 521.86/843.30/+61.6%   |
25| 167264.88/242422.15/+44.9% | 2181.60/2788.16/+27.8% |
50| 272181.02/294347.04/+8.1%  | 3071.56/3257.85/+6.1%  |

Signed-off-by: Jason Wang 
Acked-by: Michael S. Tsirkin 
Signed-off-by: David S. Miller