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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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15
migration/block-dirty-bitmap.c
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@ -762,11 +762,11 @@ static int dirty_bitmap_save_complete(QEMUFile *f, void *opaque)
return 0;
}
static void dirty_bitmap_save_pending(void *opaque,
uint64_t max_size,
uint64_t *res_precopy_only,
uint64_t *res_compatible,
uint64_t *res_postcopy_only)
static void dirty_bitmap_state_pending(void *opaque,
uint64_t max_size,
uint64_t *res_precopy_only,
uint64_t *res_compatible,
uint64_t *res_postcopy_only)
{
DBMSaveState *s = &((DBMState *)opaque)->save;
SaveBitmapState *dbms;
@ -784,7 +784,7 @@ static void dirty_bitmap_save_pending(void *opaque,
qemu_mutex_unlock_iothread();
trace_dirty_bitmap_save_pending(pending, max_size);
trace_dirty_bitmap_state_pending(pending);
*res_postcopy_only += pending;
}
@ -1253,7 +1253,8 @@ static SaveVMHandlers savevm_dirty_bitmap_handlers = {
.save_live_complete_postcopy = dirty_bitmap_save_complete,
.save_live_complete_precopy = dirty_bitmap_save_complete,
.has_postcopy = dirty_bitmap_has_postcopy,
.save_live_pending = dirty_bitmap_save_pending,
.state_pending_exact = dirty_bitmap_state_pending,
.state_pending_estimate = dirty_bitmap_state_pending,
.save_live_iterate = dirty_bitmap_save_iterate,
.is_active_iterate = dirty_bitmap_is_active_iterate,
.load_state = dirty_bitmap_load,