@@ -44,18 +44,15 @@ static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
ram_addr_t length,
unsigned client)
{
- ram_addr_t addr, end;
+ unsigned long end, page, next;
assert(client < DIRTY_MEMORY_NUM);
- end = TARGET_PAGE_ALIGN(start + length);
- start &= TARGET_PAGE_MASK;
- for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
- if (test_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client])) {
- return true;
- }
- }
- return false;
+ end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+ page = start >> TARGET_PAGE_BITS;
+ next = find_next_bit(ram_list.dirty_memory[client], end, page);
+
+ return next < end;
}
static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
This operation is way faster that doing it bit by bit. Signed-off-by: Juan Quintela <quintela@redhat.com> --- include/exec/memory-internal.h | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-)