We are recalculating ram size continously, when we know that it don't
change during migration. Create a field in RAMState to track it.
Signed-off-by: Juan Quintela <quintela@xxxxxxxxxx>
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
migration/ram.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index 4dd9cf87ea..d108bf6951 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -330,6 +330,8 @@ struct RAMState {
PageSearchStatus pss[RAM_CHANNEL_MAX];
/* UFFD file descriptor, used in 'write-tracking' migration */
int uffdio_fd;
+ /* total ram size in bytes */
+ uint64_t ram_bytes_total;
/* Last block that we have visited searching for dirty pages */
RAMBlock *last_seen_block;
/* Last dirty target page we have sent */
@@ -2546,7 +2548,7 @@ static int ram_find_and_save_block(RAMState *rs)
int pages = 0;
/* No dirty page as there is zero RAM */
- if (!ram_bytes_total()) {
+ if (!rs->ram_bytes_total) {
return pages;
}
@@ -3009,13 +3011,14 @@ static int ram_state_init(RAMState **rsp)
qemu_mutex_init(&(*rsp)->bitmap_mutex);
qemu_mutex_init(&(*rsp)->src_page_req_mutex);
QSIMPLEQ_INIT(&(*rsp)->src_page_requests);
+ (*rsp)->ram_bytes_total = ram_bytes_total();
/*
* Count the total number of pages used by ram blocks not including any
* gaps due to alignment or unplugs.
* This must match with the initial values of dirty bitmap.
*/
- (*rsp)->migration_dirty_pages = ram_bytes_total() >> TARGET_PAGE_BITS;
+ (*rsp)->migration_dirty_pages = (*rsp)->ram_bytes_total >> TARGET_PAGE_BITS;
ram_state_reset(*rsp);
return 0;
--
2.39.1
