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Use qemu_put_buffer_async for guest memory pages

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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>
This commit is contained in:
Orit Wasserman 2013-03-22 16:48:03 +02:00 committed by Juan Quintela
parent 6181ec2455
commit 500f0061d6
1 changed files with 1 additions and 1 deletions
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2
arch_init.c
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@ -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++;
}