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[Qemu-devel] [RFC][PATCH 8/9] migration: do not sent zero_pages in bulk
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [RFC][PATCH 8/9] migration: do not sent zero_pages in bulk stage |
Date: |
Tue, 12 Mar 2013 16:54:14 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130221 Thunderbird/17.0.3 |
if the dup_page is a zero_page do not send it at all.
the memory at the destination reads as zero anyway.
Signed-off-by: Peter Lieven <address@hidden>
---
arch_init.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index 04c82e4..abd54a7 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -447,9 +447,11 @@ static int ram_save_block(QEMUFile *f, bool last_stage)
bytes_sent = -1;
if (ram_bulk_stage && is_dup_page(p)) {
acct_info.dup_pages++;
- bytes_sent = save_block_hdr(f, block, offset, cont,
+ if (p[0]) {
+ bytes_sent = save_block_hdr(f, block, offset, cont,
RAM_SAVE_FLAG_COMPRESS);
- qemu_put_byte(f, *p);
+ qemu_put_byte(f, *p);
+ }
bytes_sent += 1;
} else if (!ram_bulk_stage && migrate_use_xbzrle()) {
current_addr = block->offset + offset;
--
1.7.9.5
- [Qemu-devel] [RFC][PATCH 8/9] migration: do not sent zero_pages in bulk stage,
Peter Lieven <=