[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 1/2] migration/postcopy: reduce one operation to cal
From: |
Wei Yang |
Subject: |
[Qemu-devel] [PATCH 1/2] migration/postcopy: reduce one operation to calculate fixup_start_addr |
Date: |
Wed, 10 Jul 2019 13:08:13 +0800 |
Use the same way for run_end to calculate run_start, which saves one
operation.
Signed-off-by: Wei Yang <address@hidden>
---
migration/ram.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index 410e0f89fe..c4dc36e525 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2884,10 +2884,12 @@ static void
postcopy_chunk_hostpages_pass(MigrationState *ms, bool unsent_pass,
host_offset = run_start % host_ratio;
if (host_offset) {
do_fixup = true;
- run_start -= host_offset;
- fixup_start_addr = run_start;
- /* For the next pass */
- run_start = run_start + host_ratio;
+ fixup_start_addr = run_start - host_offset;
+ /*
+ * This host page has gone, the next loop iteration starts
+ * from after the fixup
+ */
+ run_start = fixup_start_addr + host_ratio;
} else {
/* Find the end of this run */
unsigned long run_end;
--
2.17.1