kernel/drivers/vhost/vhost.c, branch linux-3.10.y

vhost: actually track log eventfd file

2015-08-10T19:20:31Z

commit 7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5 upstream. While reviewing vhost log code, I found out that log_file is never set. Note: I haven't tested the change (QEMU doesn't use LOG_FD yet). Signed-off-by: Marc-André Lureau Signed-off-by: Michael S. Tsirkin Signed-off-by: Greg Kroah-Hartman

vhost: check owner before we overwrite ubuf_info

2013-06-11T09:46:21Z

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

2013-05-06T11:04:06Z

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

2013-05-06T09:57:54Z

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

vhost: fix error handling in RESET_OWNER ioctl

2013-05-01T07:02:54Z

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

2013-05-01T07:02:53Z

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

2013-05-01T07:02:52Z

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

2013-05-01T07:02:45Z

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

2013-04-11T20:16:22Z

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

vhost_net: handle polling errors when setting backend

2013-01-29T20:43:03Z

Currently, the polling errors were ignored, which can lead following issues: - vhost remove itself unconditionally from waitqueue when stopping the poll, this may crash the kernel since the previous attempt of starting may fail to add itself to the waitqueue - userspace may think the backend were successfully set even when the polling failed. Solve this by: - check poll->wqh before trying to remove from waitqueue - report polling errors in vhost_poll_start(), tx_poll_start(), the return value will be checked and returned when userspace want to set the backend After this fix, there still could be a polling failure after backend is set, it will addressed by the next patch. Signed-off-by: Jason Wang Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller