Asias He 4f7f46d32c tcm_vhost: Use vq->private_data to indicate if the endpoint is setup ... Currently, vs->vs_endpoint is used indicate if the endpoint is setup or not. It is set or cleared in vhost_scsi_set_endpoint() or vhost_scsi_clear_endpoint() under the vs->dev.mutex lock. However, when we check it in vhost_scsi_handle_vq(), we ignored the lock. Instead of using the vs->vs_endpoint and the vs->dev.mutex lock to indicate the status of the endpoint, we use per virtqueue vq->private_data to indicate it. In this way, we can only take the vq->mutex lock which is per queue and make the concurrent multiqueue process having less lock contention. Further, in the read side of vq->private_data, we can even do not take the lock if it is accessed in the vhost worker thread, because it is protected by "vhost rcu". (nab: Do s/VHOST_FEATURES/~VHOST_SCSI_FEATURES) Signed-off-by: Asias He <asias@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>		2013-04-08 14:07:00 -07:00
..
Kconfig	drivers/vhost: remove depends on CONFIG_EXPERIMENTAL	2013-01-21 14:52:45 -08:00
Kconfig.tcm	drivers/vhost: remove depends on CONFIG_EXPERIMENTAL	2013-01-21 14:52:45 -08:00
Makefile	tcm_vhost: Initial merge for vhost level target fabric driver	2012-07-29 13:49:10 -07:00
net.c	vhost_net: handle polling errors when setting backend	2013-01-29 15:43:03 -05:00
tcm_vhost.c	tcm_vhost: Use vq->private_data to indicate if the endpoint is setup	2013-04-08 14:07:00 -07:00
tcm_vhost.h	tcm_vhost: Multi-queue support	2013-02-13 11:30:14 -08:00
test.c	vhost: Separate vhost-net features from vhost features	2012-07-22 01:21:53 +03:00
test.h	vhost test module	2010-12-09 16:00:21 +02:00
vhost.c	vhost_net: handle polling errors when setting backend	2013-01-29 15:43:03 -05:00
vhost.h	vhost_net: handle polling errors when setting backend	2013-01-29 15:43:03 -05:00