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| author |   Ingo Molnar <mingo@kernel.org> | 2012-04-14 13:18:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-14 13:19:04 +0200 |
| commit | 6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e (patch) | |
| tree | 021cc9f6b477146fcebe6f3be4752abfa2ba18a9 /drivers/vhost | |
| parent | uprobes/core: Optimize probe hits with the help of a counter (diff) | |
| parent | Merge tag 'v3.4-rc2' into perf/core (diff) | |
| download | linux-dev-6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e.tar.xz linux-dev-6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e.zip | |
Merge branch 'perf/core' into perf/uprobes
Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/net.c | 2 | ||||
| -rw-r--r-- | drivers/vhost/vhost.c | 15 | ||||
| -rw-r--r-- | drivers/vhost/vhost.h | 2 |
3 files changed, 11 insertions, 8 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 9dab1f51dd43..f0da2c32fbde 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -588,7 +588,7 @@ static int vhost_net_release(struct inode *inode, struct file *f) vhost_net_stop(n, &tx_sock, &rx_sock); vhost_net_flush(n); - vhost_dev_cleanup(&n->dev); + vhost_dev_cleanup(&n->dev, false); if (tx_sock) fput(tx_sock->file); if (rx_sock) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index c14c42b95ab8..947f00d8e091 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -222,6 +222,8 @@ static int vhost_worker(void *data) if (work) { __set_current_state(TASK_RUNNING); work->fn(work); + if (need_resched()) + schedule(); } else schedule(); @@ -403,7 +405,7 @@ long vhost_dev_reset_owner(struct vhost_dev *dev) if (!memory) return -ENOMEM; - vhost_dev_cleanup(dev); + vhost_dev_cleanup(dev, true); memory->nregions = 0; RCU_INIT_POINTER(dev->memory, memory); @@ -434,8 +436,8 @@ int vhost_zerocopy_signal_used(struct vhost_virtqueue *vq) return j; } -/* Caller should have device mutex */ -void vhost_dev_cleanup(struct vhost_dev *dev) +/* Caller should have device mutex if and only if locked is set */ +void vhost_dev_cleanup(struct vhost_dev *dev, bool locked) { int i; @@ -472,7 +474,8 @@ void vhost_dev_cleanup(struct vhost_dev *dev) dev->log_file = NULL; /* No one will access memory at this point */ kfree(rcu_dereference_protected(dev->memory, - lockdep_is_held(&dev->mutex))); + locked == + lockdep_is_held(&dev->mutex))); RCU_INIT_POINTER(dev->memory, NULL); WARN_ON(!list_empty(&dev->work_list)); if (dev->worker) { @@ -937,9 +940,9 @@ static int set_bit_to_user(int nr, void __user *addr) if (r < 0) return r; BUG_ON(r != 1); - base = kmap_atomic(page, KM_USER0); + base = kmap_atomic(page); set_bit(bit, base); - kunmap_atomic(base, KM_USER0); + kunmap_atomic(base); set_page_dirty_lock(page); put_page(page); return 0; diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index a801e2821d03..8dcf4cca6bf2 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -163,7 +163,7 @@ struct vhost_dev { long vhost_dev_init(struct vhost_dev *, struct vhost_virtqueue *vqs, int nvqs); long vhost_dev_check_owner(struct vhost_dev *); long vhost_dev_reset_owner(struct vhost_dev *); -void vhost_dev_cleanup(struct vhost_dev *); +void vhost_dev_cleanup(struct vhost_dev *, bool locked); long vhost_dev_ioctl(struct vhost_dev *, unsigned int ioctl, unsigned long arg); int vhost_vq_access_ok(struct vhost_virtqueue *vq); int vhost_log_access_ok(struct vhost_dev *); |