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Merge commit 'v2.6.36-rc7' into core/rcu

Browse source 
Merge reason: Update from -rc3 to -rc7.

Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Ingo Molnar 2010-10-07 09:43:38 +02:00
commit 556ef63255
705 changed files with 6532 additions and 3738 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/vhost/net.c
View file

@ -246,7 +246,7 @@ static int get_rx_bufs(struct vhost_virtqueue *vq,
int r, nlogs = 0;
while (datalen > 0) {
if (unlikely(headcount >= VHOST_NET_MAX_SG)) {
if (unlikely(seg >= VHOST_NET_MAX_SG)) {
r = -ENOBUFS;
goto err;
}

93
drivers/vhost/vhost.c
View file

@ -60,17 +60,8 @@ static int vhost_poll_wakeup(wait_queue_t *wait, unsigned mode, int sync,
return 0;
}
/* Init poll structure */
void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
unsigned long mask, struct vhost_dev *dev)
static void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn)
{
struct vhost_work *work = &poll->work;
init_waitqueue_func_entry(&poll->wait, vhost_poll_wakeup);
init_poll_funcptr(&poll->table, vhost_poll_func);
poll->mask = mask;
poll->dev = dev;
INIT_LIST_HEAD(&work->node);
work->fn = fn;
init_waitqueue_head(&work->done);
@ -78,6 +69,18 @@ void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
work->queue_seq = work->done_seq = 0;
}
/* Init poll structure */
void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
unsigned long mask, struct vhost_dev *dev)
{
init_waitqueue_func_entry(&poll->wait, vhost_poll_wakeup);
init_poll_funcptr(&poll->table, vhost_poll_func);
poll->mask = mask;
poll->dev = dev;
vhost_work_init(&poll->work, fn);
}
/* Start polling a file. We add ourselves to file's wait queue. The caller must
* keep a reference to a file until after vhost_poll_stop is called. */
void vhost_poll_start(struct vhost_poll *poll, struct file *file)
@ -95,35 +98,38 @@ void vhost_poll_stop(struct vhost_poll *poll)
remove_wait_queue(poll->wqh, &poll->wait);
}
/* Flush any work that has been scheduled. When calling this, don't hold any
* locks that are also used by the callback. */
void vhost_poll_flush(struct vhost_poll *poll)
static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work)
{
struct vhost_work *work = &poll->work;
unsigned seq;
int left;
int flushing;
spin_lock_irq(&poll->dev->work_lock);
spin_lock_irq(&dev->work_lock);
seq = work->queue_seq;
work->flushing++;
spin_unlock_irq(&poll->dev->work_lock);
spin_unlock_irq(&dev->work_lock);
wait_event(work->done, ({
spin_lock_irq(&poll->dev->work_lock);
spin_lock_irq(&dev->work_lock);
left = seq - work->done_seq <= 0;
spin_unlock_irq(&poll->dev->work_lock);
spin_unlock_irq(&dev->work_lock);
left;
}));
spin_lock_irq(&poll->dev->work_lock);
spin_lock_irq(&dev->work_lock);
flushing = --work->flushing;
spin_unlock_irq(&poll->dev->work_lock);
spin_unlock_irq(&dev->work_lock);
BUG_ON(flushing < 0);
}
void vhost_poll_queue(struct vhost_poll *poll)
/* Flush any work that has been scheduled. When calling this, don't hold any
* locks that are also used by the callback. */
void vhost_poll_flush(struct vhost_poll *poll)
{
vhost_work_flush(poll->dev, &poll->work);
}
static inline void vhost_work_queue(struct vhost_dev *dev,
struct vhost_work *work)
{
struct vhost_dev *dev = poll->dev;
struct vhost_work *work = &poll->work;
unsigned long flags;
spin_lock_irqsave(&dev->work_lock, flags);
@ -135,6 +141,11 @@ void vhost_poll_queue(struct vhost_poll *poll)
spin_unlock_irqrestore(&dev->work_lock, flags);
}
void vhost_poll_queue(struct vhost_poll *poll)
{
vhost_work_queue(poll->dev, &poll->work);
}
static void vhost_vq_reset(struct vhost_dev *dev,
struct vhost_virtqueue *vq)
{
@ -236,6 +247,29 @@ long vhost_dev_check_owner(struct vhost_dev *dev)
return dev->mm == current->mm ? 0 : -EPERM;
}
struct vhost_attach_cgroups_struct {
struct vhost_work work;
struct task_struct *owner;
int ret;
};
static void vhost_attach_cgroups_work(struct vhost_work *work)
{
struct vhost_attach_cgroups_struct *s;
s = container_of(work, struct vhost_attach_cgroups_struct, work);
s->ret = cgroup_attach_task_all(s->owner, current);
}
static int vhost_attach_cgroups(struct vhost_dev *dev)
{
struct vhost_attach_cgroups_struct attach;
attach.owner = current;
vhost_work_init(&attach.work, vhost_attach_cgroups_work);
vhost_work_queue(dev, &attach.work);
vhost_work_flush(dev, &attach.work);
return attach.ret;
}
/* Caller should have device mutex */
static long vhost_dev_set_owner(struct vhost_dev *dev)
{
@ -255,14 +289,16 @@ static long vhost_dev_set_owner(struct vhost_dev *dev)
}
dev->worker = worker;
err = cgroup_attach_task_current_cg(worker);
wake_up_process(worker); /* avoid contributing to loadavg */
err = vhost_attach_cgroups(dev);
if (err)
goto err_cgroup;
wake_up_process(worker); /* avoid contributing to loadavg */
return 0;
err_cgroup:
kthread_stop(worker);
dev->worker = NULL;
err_worker:
if (dev->mm)
mmput(dev->mm);
@ -832,11 +868,12 @@ int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
if (r < 0)
return r;
len -= l;
if (!len)
if (!len) {
if (vq->log_ctx)
eventfd_signal(vq->log_ctx, 1);
return 0;
}
}
if (vq->log_ctx)
eventfd_signal(vq->log_ctx, 1);
/* Length written exceeds what we have stored. This is a bug. */
BUG();
return 0;