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[Patch v2 4/6] migration/postcopy: set all_zero to true on the first tar
From: |
Wei Yang |
Subject: |
[Patch v2 4/6] migration/postcopy: set all_zero to true on the first target page |
Date: |
Thu, 7 Nov 2019 20:39:05 +0800 |
For the first target page, all_zero is set to true for this round check.
After target_pages introduced, we could leverage this variable instead
of checking the address offset.
Signed-off-by: Wei Yang <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
---
migration/ram.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/migration/ram.c b/migration/ram.c
index 5c05376d8d..b5759793a9 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -4067,7 +4067,7 @@ static int ram_load_postcopy(QEMUFile *f)
page_buffer = postcopy_host_page +
((uintptr_t)host & (block->page_size - 1));
/* If all TP are zero then we can optimise the place */
- if (!((uintptr_t)host & (block->page_size - 1))) {
+ if (target_pages == 1) {
all_zero = true;
} else {
/* not the 1st TP within the HP */
--
2.17.1
- [Patch v2 0/6] migration/postcopy: enable compress during postcopy, Wei Yang, 2019/11/07
- [Patch v2 1/6] migration/postcopy: reduce memset when it is zero page and matches_target_page_size, Wei Yang, 2019/11/07
- [Patch v2 3/6] migration/postcopy: count target page number to decide the place_needed, Wei Yang, 2019/11/07
- [Patch v2 4/6] migration/postcopy: set all_zero to true on the first target page,
Wei Yang <=
- [Patch v2 2/6] migration/postcopy: wait for decompress thread in precopy, Wei Yang, 2019/11/07
- [Patch v2 5/6] migration/postcopy: enable random order target page arrival, Wei Yang, 2019/11/07
- [Patch v2 6/6] migration/postcopy: enable compress during postcopy, Wei Yang, 2019/11/07