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[2/3] migration/ram: Modify ram_save_host_page() to match the comment

Message ID 20210223021646.500-3-jiangkunkun@huawei.com
State New
Headers show
Series migration/ram: Some modifications about ram_save_host_page() | expand

Commit Message

Kunkun Jiang Feb. 23, 2021, 2:16 a.m. UTC 
According to the comment, when the host page is a huge page, the
migration_rate_limit() should be executed. If not, this function
can be omitted to save time.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
---
 migration/ram.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/migration/ram.c b/migration/ram.c
index fc49c3f898..c7e18dc2fc 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2017,7 +2017,9 @@  static int ram_save_host_page(RAMState *rs, PageSearchStatus *pss,
         pages += tmppages;
         pss->page++;
         /* Allow rate limiting to happen in the middle of huge pages */
-        migration_rate_limit();
+        if (pagesize_bits > 1) {
+            migration_rate_limit();
+        }
     } while ((pss->page & (pagesize_bits - 1)) &&
              offset_in_ramblock(pss->block,
                                 ((ram_addr_t)pss->page) << TARGET_PAGE_BITS));