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Re: [Xen-devel] [PATCH] xen: cpupools: update domU's node-affinity on the cpupool_unassign_cpu() path
- To: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
- From: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
- Date: Mon, 30 Sep 2013 07:38:56 +0200
- Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxx>
- Delivery-date: Mon, 30 Sep 2013 05:39:43 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 27.09.2013 17:46, Dario Faggioli wrote:
that is, when a cpu is remove from a pool, as it is happening already
on the cpupool_assign_cpu_*() path (i.e., when a cpu is added to a
pool).
Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
Cc: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Cc: Keir Fraser <keir@xxxxxxx>
Acked-by: Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
---
This patch was originally an hunk of the first version of a patch I sent last
week as a bugfix for an ASSERT() triggering in the NUMA-aware scheduling code.
Truned out that the bug was better fixe in a completely different way, and
hence this part was killed from there... That's why I'm resending it now as a
separate patch.
Dario
---
xen/common/cpupool.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/xen/common/cpupool.c b/xen/common/cpupool.c
index 2164a9f..23e461d 100644
--- a/xen/common/cpupool.c
+++ b/xen/common/cpupool.c
@@ -355,6 +355,14 @@ int cpupool_unassign_cpu(struct cpupool *c, unsigned int
cpu)
atomic_inc(&c->refcnt);
cpupool_cpu_moving = c;
cpumask_clear_cpu(cpu, c->cpu_valid);
+
+ rcu_read_lock(&domlist_read_lock);
+ for_each_domain_in_cpupool(d, c)
+ {
+ domain_update_node_affinity(d);
+ }
+ rcu_read_unlock(&domlist_read_lock);
+
spin_unlock(&cpupool_lock);
work_cpu = smp_processor_id();
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Juergen Gross Principal Developer Operating Systems
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