From bb315e238429926ad570185fbdcad8ace008a791 Mon Sep 17 00:00:00 2001
From: Keir Fraser <keir.fraser@citrix.com>
Date: Fri, 23 Apr 2010 08:38:35 +0100
Subject: [PATCH] cpupools: optimise domain creation if pool movement is a
 no-op

Signed-off by: Juergen Gross <juergen.gross@ts.fujitsu.com>
---
 xen/common/cpupool.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/common/cpupool.c b/xen/common/cpupool.c
index 7e32296061..6baedd0e14 100644
--- a/xen/common/cpupool.c
+++ b/xen/common/cpupool.c
@@ -520,6 +520,12 @@ addcpu_out:
             rcu_unlock_domain(d);
             break;
         }
+        if ( op->cpupool_id == d->cpupool->cpupool_id )
+        {
+            ret = 0;
+            rcu_unlock_domain(d);
+            break;
+        }
         printk(XENLOG_DEBUG "cpupool move_domain(dom=%d)->pool=%d\n",
             d->domain_id, op->cpupool_id);
         ret = -ENOENT;
-- 
2.30.2