From bd2ee5c0702fb68553599c9a2bc797e3a5b796df Mon Sep 17 00:00:00 2001
From: huweihua <huweihua@cn.ibm.com>
Date: Sun, 22 Nov 2015 21:30:33 -0500
Subject: [PATCH] use lazy mode of umount to increase the success rate

---
 xCAT-server/lib/xcat/plugins/rmimage.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xCAT-server/lib/xcat/plugins/rmimage.pm b/xCAT-server/lib/xcat/plugins/rmimage.pm
index 55cb15e2b..79b1df18d 100644
--- a/xCAT-server/lib/xcat/plugins/rmimage.pm
+++ b/xCAT-server/lib/xcat/plugins/rmimage.pm
@@ -190,7 +190,7 @@ sub process_request {
    # umount the rootimg/dev
    my $devmount = `cat /proc/mounts |grep  "$imagedir/rootimg/dev"`; 
    if($devmount){
-       xCAT::Utils->runcmd("umount $imagedir/rootimg/dev");
+       xCAT::Utils->runcmd("umount -l  $imagedir/rootimg/dev");
        if($?){
            $callback->({error=>["$imagedir/rootimg/dev mount on /dev, and can't umount. remove $imagename will lead to unpredictable result, please umount manualy before try again"], errorcode=>[1]}); 
            return;