[Xen-devel] [PATCH 2/2] xen: cpupool: small optimization when moving between pools

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

If the domain is already where we want it to go,
there's not much to do indeed.

Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
---
Cc: Juergen Gross <jgross@xxxxxxxx>
---
 xen/common/cpupool.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/common/cpupool.c b/xen/common/cpupool.c
index 5dacc61..9998394 100644
--- a/xen/common/cpupool.c
+++ b/xen/common/cpupool.c
@@ -232,6 +232,9 @@ static int cpupool_move_domain_locked(struct domain *d, 
struct cpupool *c)
 {
     int ret;
 
+    if ( unlikely(d->cpupool == c) )
+        return 0;
+
     d->cpupool->n_dom--;
     ret = sched_move_domain(d, c);
     if ( ret )


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