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# cat 0001-MINOR-add-TCP_NODELAY-to-qemu-part-socket.-speedup-b.patch 
From 2537cf5489595bb372bf10414d65ce37daec60c5 Mon Sep 17 00:00:00 2001
From: Vladimir Sementsov-Ogievskiy <[email protected]>
Date: Wed, 20 Aug 2014 15:02:14 +0400
Subject: [PATCH] MINOR add TCP_NODELAY to qemu-part socket. speedup backup
 ~x300

Signed-off-by: Vladimir Sementsov-Ogievskiy <[email protected]>

---
 livebackup.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/livebackup.c b/livebackup.c
index 0edaac0..c1b9ed7 100644
--- a/livebackup.c
+++ b/livebackup.c
@@ -11,6 +11,7 @@
  *
  */

+#include <netinet/tcp.h>
 #include "livebackup.h"

 static livebackup_disk *backup_disks = NULL;
@@ -1307,6 +1308,12 @@ backup_thread(void *unused)
             goto error;
         }

+        opt = 1;
+        if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)) == -1) {
+            fprintf(stderr, "Error %d setting reuseaddr\n", errno);
+            goto error;
+        }
+
         do_backup(fd);

         if (fd >= 0) close(fd);
-- 
1.8.3.2