postcopy: Record largest page size
Record the largest page size in use; we'll need it soon for allocating
temporary buffers.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20170224182844.32452-7-dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
diff --git a/exec.c b/exec.c
index 24cdf64..785d20f 100644
--- a/exec.c
+++ b/exec.c
@@ -1524,6 +1524,19 @@
return rb->page_size;
}
+/* Returns the largest size of page in use */
+size_t qemu_ram_pagesize_largest(void)
+{
+ RAMBlock *block;
+ size_t largest = 0;
+
+ QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
+ largest = MAX(largest, qemu_ram_pagesize(block));
+ }
+
+ return largest;
+}
+
static int memory_try_enable_merging(void *addr, size_t len)
{
if (!machine_mem_merge(current_machine)) {