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migration/block: Apply late-block-active behavior to postcopy

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Postcopy never cared about late-block-active.  However there's no mention
in the capability that it doesn't apply to postcopy.

Considering that we _assumed_ late activation is always good, do that too
for postcopy unconditionally, just like precopy.  After this patch, we
should have unified the behavior across all.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Message-Id: <20241206230838.1111496-5-peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Peter Xu 2024-12-06 18:08:36 -05:00 • committed by Fabiano Rosas
parent fca9aef1c8
commit 61f2b48998
1 changed files with 12 additions and 13 deletions
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25
migration/savevm.c
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@ -2137,22 +2137,21 @@ static void loadvm_postcopy_handle_run_bh(void *opaque)
trace_vmstate_downtime_checkpoint("dst-postcopy-bh-announced");
/* Make sure all file formats throw away their mutable metadata.
* If we get an error here, just don't restart the VM yet. */
bdrv_activate_all(&local_err);
if (local_err) {
error_report_err(local_err);
local_err = NULL;
autostart = false;
}
trace_vmstate_downtime_checkpoint("dst-postcopy-bh-cache-invalidated");
dirty_bitmap_mig_before_vm_start();
if (autostart) {
/* Hold onto your hats, starting the CPU */
vm_start();
/*
* Make sure all file formats throw away their mutable metadata.
* If we get an error here, just don't restart the VM yet.
*/
bdrv_activate_all(&local_err);
trace_vmstate_downtime_checkpoint("dst-postcopy-bh-cache-invalidated");
if (local_err) {
error_report_err(local_err);
local_err = NULL;
} else {
vm_start();
}
} else {
/* leave it paused and let management decide when to start the CPU */
runstate_set(RUN_STATE_PAUSED);