From: Orit Wasserman <owasserm@redhat.com>
Date: Fri, 22 Mar 2013 14:48:03 +0000 (+0200)
Subject: Use qemu_put_buffer_async for guest memory pages
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=500f0061d628b52220038939728f0d7aee634468;p=qemu.git

Use qemu_put_buffer_async for guest memory pages

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>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---

diff --git a/arch_init.c b/arch_init.c
index e1af89875e..4ef5a15a6e 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -478,7 +478,7 @@ 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_async(f, p, TARGET_PAGE_SIZE);
                 bytes_sent += TARGET_PAGE_SIZE;
                 acct_info.norm_pages++;
             }