This is a note to let you know that I've just added the patch titled
s390/topology: call set_sched_topology early
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-topology-call-set_sched_topology-early.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 48e9a6c1f54695609b709bf674aac133794ada00 Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Date: Wed, 24 Sep 2014 16:37:20 +0200
Subject: s390/topology: call set_sched_topology early
From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
commit 48e9a6c1f54695609b709bf674aac133794ada00 upstream.
The call to topology_init is too late for the set_sched_topology call.
The initial scheduling domain structure has already been established
with default topology array. Use the smp_cpus_done() call to get the
s390 specific topology array registered early enough.
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kernel/topology.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -464,15 +464,17 @@ static struct sched_domain_topology_leve
static int __init topology_init(void)
{
- if (!MACHINE_HAS_TOPOLOGY) {
+ if (MACHINE_HAS_TOPOLOGY)
+ set_topology_timer();
+ else
topology_update_polarization_simple();
- goto out;
- }
- set_topology_timer();
-out:
-
- set_sched_topology(s390_topology);
-
return device_create_file(cpu_subsys.dev_root, &dev_attr_dispatching);
}
device_initcall(topology_init);
+
+static int __init early_topology_init(void)
+{
+ set_sched_topology(s390_topology);
+ return 0;
+}
+early_initcall(early_topology_init);
Patches currently in stable-queue which might be from schwidefsky@xxxxxxxxxx are
queue-3.17/s390-topology-call-set_sched_topology-early.patch
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