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migration/next for 20170421

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Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20170421' into staging

migration/next for 20170421

# gpg: Signature made Fri 21 Apr 2017 11:28:13 BST
# gpg:                using RSA key 0xF487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration/20170421: (65 commits)
  hmp: info migrate_parameters format tunes
  hmp: info migrate_capability format tunes
  migration: rename max_size to threshold_size
  migration: set current_active_state once
  virtio-rng: stop virtqueue while the CPU is stopped
  migration: don't close a file descriptor while it can be in use
  ram: Remove migration_bitmap_extend()
  migration: Disable hotplug/unplug during migration
  qdev: Move qdev_unplug() to qdev-monitor.c
  qdev: Export qdev_hot_removed
  qdev: qdev_hotplug is really a bool
  migration: Remove MigrationState parameter from migration_is_idle()
  ram: Use RAMBitmap type for coherence
  ram: rename last_ram_offset() last_ram_pages()
  ram: Use ramblock and page offset instead of absolute offset
  ram: Change offset field in PageSearchStatus to page
  ram: Remember last_page instead of last_offset
  ram: Use page number instead of an address for the bitmap operations
  ram: reorganize last_sent_block
  ram: ram_discard_range() don't use the mis parameter
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-04-21 15:59:27 +01:00
commit 32c7e0ab75
18 changed files with 839 additions and 779 deletions
Download patch file Download diff file Expand all files Collapse all files

3
hw/virtio/trace-events
View file

@ -11,8 +11,11 @@ virtio_set_status(void *vdev, uint8_t val) "vdev %p val %u"
# hw/virtio/virtio-rng.c
virtio_rng_guest_not_ready(void *rng) "rng %p: guest not ready"
virtio_rng_cpu_is_stopped(void *rng, int size) "rng %p: cpu is stopped, dropping %d bytes"
virtio_rng_popped(void *rng) "rng %p: elem popped"
virtio_rng_pushed(void *rng, size_t len) "rng %p: %zd bytes pushed"
virtio_rng_request(void *rng, size_t size, unsigned quota) "rng %p: %zd bytes requested, %u bytes quota left"
virtio_rng_vm_state_change(void *rng, int running, int state) "rng %p: state change to running %d state %d"
# hw/virtio/virtio-balloon.c
#

33
hw/virtio/virtio-rng.c
View file

@ -53,6 +53,15 @@ static void chr_read(void *opaque, const void *buf, size_t size)
return;
}
/* we can't modify the virtqueue until
* our state is fully synced
*/
if (!runstate_check(RUN_STATE_RUNNING)) {
trace_virtio_rng_cpu_is_stopped(vrng, size);
return;
}
vrng->quota_remaining -= size;
offset = 0;
@ -61,6 +70,7 @@ static void chr_read(void *opaque, const void *buf, size_t size)
if (!elem) {
break;
}
trace_virtio_rng_popped(vrng);
len = iov_from_buf(elem->in_sg, elem->in_num,
0, buf + offset, size - offset);
offset += len;
@ -120,17 +130,21 @@ static uint64_t get_features(VirtIODevice *vdev, uint64_t f, Error **errp)
return f;
}
static int virtio_rng_post_load(void *opaque, int version_id)
static void virtio_rng_vm_state_change(void *opaque, int running,
RunState state)
{
VirtIORNG *vrng = opaque;
/* We may have an element ready but couldn't process it due to a quota
* limit. Make sure to try again after live migration when the quota may
* have been reset.
*/
virtio_rng_process(vrng);
trace_virtio_rng_vm_state_change(vrng, running, state);
return 0;
/* We may have an element ready but couldn't process it due to a quota
* limit or because CPU was stopped. Make sure to try again when the
* CPU restart.
*/
if (running && is_guest_ready(vrng)) {
virtio_rng_process(vrng);
}
}
static void check_rate_limit(void *opaque)
@ -198,6 +212,9 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
check_rate_limit, vrng);
vrng->activate_timer = true;
vrng->vmstate = qemu_add_vm_change_state_handler(virtio_rng_vm_state_change,
vrng);
}
static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
@ -205,6 +222,7 @@ static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIORNG *vrng = VIRTIO_RNG(dev);
qemu_del_vm_change_state_handler(vrng->vmstate);
timer_del(vrng->rate_limit_timer);
timer_free(vrng->rate_limit_timer);
virtio_cleanup(vdev);
@ -218,7 +236,6 @@ static const VMStateDescription vmstate_virtio_rng = {
VMSTATE_VIRTIO_DEVICE,
VMSTATE_END_OF_LIST()
},
.post_load = virtio_rng_post_load,
};
static Property virtio_rng_properties[] = {