[PATCH] sched: update root-domain spans upon departure

[PATCH] sched: update root-domain spans upon departure

[Gregory Haskins]

Hi Ingo,
  This patch should have been rolled into the series I dropped on you
  yesterday, but was an oversight.  Please apply to sched-devel at your
  earliest convenience.

-Greg

-----------------------

sched: update root-domain spans upon departure

We shouldnt leave cpus enabled in the spans if that RQ has left the domain.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
---

 kernel/sched.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 05a9a81..33f8b0c 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5845,6 +5845,10 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
 
 		if (atomic_dec_and_test(&old_rd->refcount))
 			kfree(old_rd);
+		else {
+			cpu_clear(rq->cpu, old_rd->span);
+			cpu_clear(rq->cpu, old_rd->online);
+		}
 	}
 
 	atomic_inc(&rd->refcount);

[PATCH] sched: update root-domain spans upon departure

[Gregory Haskins]

Hmm...I made a last second "optimization" before sending that patch out and
then realized it was racy.  Try this one instead...(sorry for the churn)

-Greg

------------------------------
sched: update root-domain spans upon departure

We shouldnt leave cpus enabled in the spans if that RQ has left the domain.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
---

 kernel/sched.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 05a9a81..02f04bc 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5843,6 +5843,9 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
 				class->leave_domain(rq);
 		}
 
+		cpu_clear(rq->cpu, old_rd->span);
+		cpu_clear(rq->cpu, old_rd->online);
+
 		if (atomic_dec_and_test(&old_rd->refcount))
 			kfree(old_rd);
 	}