Otherwise, after migration, we end up with a much larger RSS size then we
ought to have.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
if (flags & RAM_SAVE_FLAG_COMPRESS) {
uint8_t ch = qemu_get_byte(f);
+#if defined(__linux__)
+ if (ch == 0 &&
+ (!kvm_enabled() || kvm_has_sync_mmu())) {
+ madvise(qemu_get_ram_ptr(addr), TARGET_PAGE_SIZE, MADV_DONTNEED);
+ } else
+#endif
memset(qemu_get_ram_ptr(addr), ch, TARGET_PAGE_SIZE);
} else if (flags & RAM_SAVE_FLAG_PAGE)
qemu_get_buffer(f, qemu_get_ram_ptr(addr), TARGET_PAGE_SIZE);