This boolean flag shows whether the current page during migration is triggered
by postcopy or not. Then in ram_save_host_page() and deeper stack we'll be
able to have a reference on the priority of this page.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
migration/ram.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/migration/ram.c b/migration/ram.c
index 3532f64ecb..bfcd45a36e 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -414,6 +414,8 @@ struct PageSearchStatus {
unsigned long page;
/* Set once we wrap around */
bool complete_round;
+ /* Whether current page is explicitly requested by postcopy */
+ bool postcopy_requested;
};
typedef struct PageSearchStatus PageSearchStatus;
@@ -1487,6 +1489,9 @@ retry:
*/
static bool find_dirty_block(RAMState *rs, PageSearchStatus *pss, bool *again)
{
+ /* This is not a postcopy requested page */
+ pss->postcopy_requested = false;
+
pss->page = migration_bitmap_find_dirty(rs, pss->block, pss->page);
if (pss->complete_round && pss->block == rs->last_seen_block &&
pss->page >= rs->last_page) {
@@ -1981,6 +1986,7 @@ static bool get_queued_page(RAMState *rs, PageSearchStatus *pss)
* really rare.
*/
pss->complete_round = false;
+ pss->postcopy_requested = true;
}
return !!block;
--
2.32.0