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memory: optimize memory_global_dirty_log_sync 

Only return a nonzero dirty_log_mask for RAM/ROM memory regions.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-09-22 16:09:08 +02:00
parent 9a54635dcb
commit adaad61c3c
1 changed files with 5 additions and 3 deletions
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8
memory.c
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@ -1499,7 +1499,7 @@ bool memory_region_is_skip_dump(MemoryRegion *mr)
uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr)
{
uint8_t mask = mr->dirty_log_mask;
if (global_dirty_log) {
if (global_dirty_log && mr->ram_block) {
mask |= (1 << DIRTY_MEMORY_MIGRATION);
}
return mask;
@ -2171,8 +2171,10 @@ void memory_global_dirty_log_sync(void)
as = listener->address_space;
view = address_space_get_flatview(as);
FOR_EACH_FLAT_RANGE(fr, view) {
MemoryRegionSection mrs = section_from_flat_range(fr, as);
listener->log_sync(listener, &mrs);
if (fr->dirty_log_mask) {
MemoryRegionSection mrs = section_from_flat_range(fr, as);
listener->log_sync(listener, &mrs);
}
}
flatview_unref(view);
}