From: Keir Fraser <keir.fraser@citrix.com>
Date: Fri, 23 Apr 2010 07:38:35 +0000 (+0100)
Subject: cpupools: optimise domain creation if pool movement is a no-op
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~12315
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=bb315e238429926ad570185fbdcad8ace008a791;p=xen.git

cpupools: optimise domain creation if pool movement is a no-op

Signed-off by: Juergen Gross <juergen.gross@ts.fujitsu.com>
---

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;