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migration: Split save_live_pending() into state_pending_*

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We split the function into to:

- state_pending_estimate: We estimate the remaining state size without
  stopping the machine.

- state pending_exact: We calculate the exact amount of remaining
  state.

The only "device" that implements different functions for _estimate()
and _exact() is ram.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Juan Quintela 2022-10-03 02:00:03 +02:00
parent 255dc7af7e
commit c8df4a7aef
13 changed files with 143 additions and 76 deletions
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21
hw/vfio/migration.c
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@ -456,11 +456,11 @@ static void vfio_save_cleanup(void *opaque)
trace_vfio_save_cleanup(vbasedev->name);
}
static void vfio_save_pending(void *opaque,
uint64_t threshold_size,
uint64_t *res_precopy_only,
uint64_t *res_compatible,
uint64_t *res_postcopy_only)
static void vfio_state_pending(void *opaque,
uint64_t threshold_size,
uint64_t *res_precopy_only,
uint64_t *res_compatible,
uint64_t *res_postcopy_only)
{
VFIODevice *vbasedev = opaque;
VFIOMigration *migration = vbasedev->migration;
@ -473,7 +473,7 @@ static void vfio_save_pending(void *opaque,
*res_precopy_only += migration->pending_bytes;
trace_vfio_save_pending(vbasedev->name, *res_precopy_only,
trace_vfio_state_pending(vbasedev->name, *res_precopy_only,
*res_postcopy_only, *res_compatible);
}
@ -515,9 +515,9 @@ static int vfio_save_iterate(QEMUFile *f, void *opaque)
}
/*
* Reset pending_bytes as .save_live_pending is not called during savevm or
* snapshot case, in such case vfio_update_pending() at the start of this
* function updates pending_bytes.
* Reset pending_bytes as state_pending* are not called during
* savevm or snapshot case, in such case vfio_update_pending() at
* the start of this function updates pending_bytes.
*/
migration->pending_bytes = 0;
trace_vfio_save_iterate(vbasedev->name, data_size);
@ -685,7 +685,8 @@ static int vfio_load_state(QEMUFile *f, void *opaque, int version_id)
static SaveVMHandlers savevm_vfio_handlers = {
.save_setup = vfio_save_setup,
.save_cleanup = vfio_save_cleanup,
.save_live_pending = vfio_save_pending,
.state_pending_exact = vfio_state_pending,
.state_pending_estimate = vfio_state_pending,
.save_live_iterate = vfio_save_iterate,
.save_live_complete_precopy = vfio_save_complete_precopy,
.save_state = vfio_save_state,