[RFC,11/12] Use qemu_put_buffer_no_copy for guest memory pages

Submitted by Orit Wasserman on March 21, 2013, 9:09 a.m.

Details

Message ID 1363856971-4601-12-git-send-email-owasserm@redhat.com
State New
Headers show

Commit Message

Orit Wasserman March 21, 2013, 9:09 a.m.
This will remove an unneeded copy of guest memory pages.
For the page header and device state we still copy the data to the
static buffer the other option is to allocate the memory on demand
which is more expensive.

Signed-off-by: Orit Wasserman <owasserm@redhat.com>
---
 arch_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/arch_init.c b/arch_init.c
index 98e2bc6..27b53eb 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -481,7 +481,7 @@  static int ram_save_block(QEMUFile *f, bool last_stage)
             /* XBZRLE overflow or normal page */
             if (bytes_sent == -1) {
                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
-                qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
+                qemu_put_buffer_no_copy(f, p, TARGET_PAGE_SIZE);
                 bytes_sent += TARGET_PAGE_SIZE;
                 acct_info.norm_pages++;
             }