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migration/postcopy: set all_zero to true on the first target page

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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 <richardw.yang@linux.intel.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Wei Yang 2019-11-07 20:39:05 +08:00 • committed by Juan Quintela
parent 4cbb3c63c1
commit e5e73b0f90
1 changed files with 1 additions and 1 deletions
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2
migration/ram.c
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@ -4102,7 +4102,7 @@ static int ram_load_postcopy(QEMUFile *f)
page_buffer = postcopy_host_page + page_buffer = postcopy_host_page +
((uintptr_t)host & (block->page_size - 1)); ((uintptr_t)host & (block->page_size - 1));
/* If all TP are zero then we can optimise the place */ /* 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; all_zero = true;
} else { } else {
/* not the 1st TP within the HP */ /* not the 1st TP within the HP */