search for: queue_flag_noxmerg

Hi, when an active virtio block device is hot-unplugged from a KVM guest, running affected guest user applications are not aware of any errors that occur due to the lost device. This patch-set adds code to avoid further request queueing when a lost block device is detected, resulting in appropriate error info. On System z there exists no handshake mechanism between host and guest when a device

Hi, when an active virtio block device is hot-unplugged from a KVM guest, running affected guest user applications are not aware of any errors that occur due to the lost device. This patch-set adds code to avoid further request queueing when a lost block device is detected, resulting in appropriate error info. On System z there exists no handshake mechanism between host and guest when a device

...rtblk_notify(struct virtio_device *vdev, int event) +{ + struct virtio_blk *vblk = vdev->priv; + + if (event == VDEV_GONE) { + queue_flag_set_unlocked(QUEUE_FLAG_DYING, vblk->disk->queue); + queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, vblk->disk->queue); + queue_flag_set_unlocked(QUEUE_FLAG_NOXMERGES, + vblk->disk->queue); + } + return NOTIFY_DONE; +} + #ifdef CONFIG_PM static int virtblk_freeze(struct virtio_device *vdev) { @@ -961,6 +974,7 @@ static struct virtio_driver virtio_blk = { .probe = virtblk_probe, .remove = virtblk_remove, .config_changed = virtblk_config_...

...irtio_blk *vblk = vdev->priv; + unsigned long flags; + + if (event == VDEV_GONE) { + spin_lock_irqsave(vblk->disk->queue->queue_lock, flags); + queue_flag_set(QUEUE_FLAG_DYING, vblk->disk->queue); + queue_flag_set(QUEUE_FLAG_NOMERGES, vblk->disk->queue); + queue_flag_set(QUEUE_FLAG_NOXMERGES, vblk->disk->queue); + spin_unlock_irqrestore(vblk->disk->queue->queue_lock, flags); + } + return NOTIFY_DONE; +} + #ifdef CONFIG_PM static int virtblk_freeze(struct virtio_device *vdev) { @@ -961,6 +977,7 @@ static struct virtio_driver virtio_blk = { .probe = virtblk_probe...

...alse; mutex_unlock(&vblk->config_lock); + if (vdev->surprize_removal) { + spin_lock_irqsave(vblk->disk->queue->queue_lock, flags); + queue_flag_set(QUEUE_FLAG_DYING, vblk->disk->queue); + queue_flag_set(QUEUE_FLAG_NOMERGES, vblk->disk->queue); + queue_flag_set(QUEUE_FLAG_NOXMERGES, vblk->disk->queue); + spin_unlock_irqrestore(vblk->disk->queue->queue_lock, flags); + } + del_gendisk(vblk->disk); blk_cleanup_queue(vblk->disk->queue); -- 1.8.3.1

...lock); + device_lost = atomic_read(&vdev->device_lost); + if (device_lost) { + spin_lock_irqsave(vblk->disk->queue->queue_lock, flags); + queue_flag_set(QUEUE_FLAG_DYING, vblk->disk->queue); + queue_flag_set(QUEUE_FLAG_NOMERGES, vblk->disk->queue); + queue_flag_set(QUEUE_FLAG_NOXMERGES, vblk->disk->queue); + spin_unlock_irqrestore(vblk->disk->queue->queue_lock, flags); + } + del_gendisk(vblk->disk); - blk_cleanup_queue(vblk->disk->queue); + if (!device_lost) + blk_cleanup_queue(vblk->disk->queue); /* Stop all the virtqueues. */ vdev->c...

Hi, here is an updated patch-set with changes as suggested by Michael Tsirkin. When an active virtio block device is hot-unplugged from a KVM guest, running affected guest user applications are not aware of any errors that occur due to the lost device. This patch-set adds code to avoid further request queueing when a lost block device is detected, resulting in appropriate error info. On System z

Hi, here is an updated patch-set with changes as suggested by Michael Tsirkin. When an active virtio block device is hot-unplugged from a KVM guest, running affected guest user applications are not aware of any errors that occur due to the lost device. This patch-set adds code to avoid further request queueing when a lost block device is detected, resulting in appropriate error info. On System z

Hi, here is an updated patch-set to my v2 RFC virtio: add new notify() callback to virtio_driver This RFC introduces a new virtio_device entry 'surprize_removal' instead of a new 'notify' callback in struct virtio_driver. When an active virtio block device is hot-unplugged from a KVM guest, affected guest user applications are not aware of any errors that occur due to the lost

Hi, here is an updated patch-set to my v2 RFC virtio: add new notify() callback to virtio_driver This RFC introduces a new virtio_device entry 'surprize_removal' instead of a new 'notify' callback in struct virtio_driver. When an active virtio block device is hot-unplugged from a KVM guest, affected guest user applications are not aware of any errors that occur due to the lost

Hi, here is my v4 patch-set update to the v3 RFC submitted on Nov 27th. When an active virtio block device is hot-unplugged from a KVM guest, affected guest user applications are not aware of any errors that occur due to the lost device. This patch-set adds code to avoid further request queueing when a lost block device is detected, resulting in appropriate error info. Additionally a potential

Hi, here is my v4 patch-set update to the v3 RFC submitted on Nov 27th. When an active virtio block device is hot-unplugged from a KVM guest, affected guest user applications are not aware of any errors that occur due to the lost device. This patch-set adds code to avoid further request queueing when a lost block device is detected, resulting in appropriate error info. Additionally a potential

...truct request_queue *q) { spinlock_t *lock = q->queue_lock; /* mark @q DEAD, no new request or merges will be allowed afterwards */ mutex_lock(&q->sysfs_lock); queue_flag_set_unlocked(QUEUE_FLAG_DEAD, q); spin_lock_irq(lock); queue_flag_set(QUEUE_FLAG_NOMERGES, q); queue_flag_set(QUEUE_FLAG_NOXMERGES, q); queue_flag_set(QUEUE_FLAG_DEAD, q); if (q->queue_lock != &q->__queue_lock) q->queue_lock = &q->__queue_lock; spin_unlock_irq(lock); mutex_unlock(&q->sysfs_lock); /* * Drain all requests queued before DEAD marking. The caller might * be trying to tear...

...truct request_queue *q) { spinlock_t *lock = q->queue_lock; /* mark @q DEAD, no new request or merges will be allowed afterwards */ mutex_lock(&q->sysfs_lock); queue_flag_set_unlocked(QUEUE_FLAG_DEAD, q); spin_lock_irq(lock); queue_flag_set(QUEUE_FLAG_NOMERGES, q); queue_flag_set(QUEUE_FLAG_NOXMERGES, q); queue_flag_set(QUEUE_FLAG_DEAD, q); if (q->queue_lock != &q->__queue_lock) q->queue_lock = &q->__queue_lock; spin_unlock_irq(lock); mutex_unlock(&q->sysfs_lock); /* * Drain all requests queued before DEAD marking. The caller might * be trying to tear...