kernel/git/stable/linux-stable.git/drivers/vhost/vhost.c, branch linux-2.6.36.y

vhost: fix log ctx signalling

2010-09-22T14:21:33+00:00

The log eventfd signalling got put in dead code. We didn't notice because qemu currently does polling instead of eventfd select. Signed-off-by: Michael S. Tsirkin

vhost: error handling fix

2010-09-06T06:49:39+00:00

vhost should set worker to NULL on cgroups attach failure, so that we won't try to destroy the worker again on close. Signed-off-by: Michael S. Tsirkin

vhost: fix attach to cgroups regression

2010-09-06T06:49:31+00:00

Since 2.6.36-rc1, non-root users of vhost-net fail to attach if they are in any cgroups. The reason is that when qemu uses vhost, vhost wants to attach its thread to all cgroups that qemu has. But we got the API backwards, so a non-priveledged process (Qemu) tried to control the priveledged one (vhost), which fails. Fix this by switching to the new cgroup_attach_task_all, and running it from the vhost thread. Signed-off-by: Michael S. Tsirkin

vhost: stop worker only if created

2010-09-01T21:26:13+00:00

Its currently illegal to call kthread_stop(NULL) Reported-by: Ingo Molnar Signed-off-by: Eric Dumazet Acked-by: Tejun Heo Signed-off-by: David S. Miller

vhost-net: mergeable buffers support

2010-07-28T12:45:36+00:00

This adds support for mergeable buffers in vhost-net: this is needed for older guests without indirect buffer support, as well as for zero copy with some devices. Includes changes by Michael S. Tsirkin to make the patch as low risk as possible (i.e., close to no changes when feature is disabled). Signed-off-by: David Stevens Signed-off-by: Michael S. Tsirkin

vhost: apply cgroup to vhost workers

2010-07-28T12:45:18+00:00

Apply the cgroup of the owner task to the created vhost worker. Based on patches from Sridhar Samudrala's and Tejun Heo. Later we'll need to also apply cpumask and probably priority of the owner process. Discussion on the best way to do this is still ongoing. Signed-off-by: Michael S. Tsirkin Cc: Tejun Heo Cc: Sridhar Samudrala Cc: Li Zefan

vhost: replace vhost_workqueue with per-vhost kthread

2010-07-28T12:44:53+00:00

Replace vhost_workqueue with per-vhost kthread. Other than callback argument change from struct work_struct * to struct vhost_work *, there's no visible change to vhost_poll_*() interface. This conversion is to make each vhost use a dedicated kthread so that resource control via cgroup can be applied. Partially based on Sridhar Samudrala's patch. * Updated to use sub structure vhost_work instead of directly using vhost_poll at Michael's suggestion. * Added flusher wake_up() optimization at Michael's suggestion. Changes by MST: * Converted atomics/barrier use to a spinlock. * Create thread on SET_OWNER * Fix flushing Signed-off-by: Tejun Heo Signed-off-by: Michael S. Tsirkin Cc: Sridhar Samudrala

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

2010-07-07T22:59:38+00:00

vhost: add unlikely annotations to error path

2010-07-01T16:25:40+00:00

patch 'break out of polling loop on error' caused a minor performance regression on my machine: recover that performance by adding a bunch of unlikely annotations in the error handling. Signed-off-by: Michael S. Tsirkin

vhost: break out of polling loop on error

2010-06-27T08:52:25+00:00

When ring parsing fails, we currently handle this as ring empty condition. This means that we enable kicks and recheck ring empty: if this not empty, we re-start polling which of course will fail again. Instead, let's return a negative error code and stop polling. Signed-off-by: Michael S. Tsirkin