Messages in this thread Patch in this message | | | Date | Wed, 12 Mar 2008 18:31:59 +0100 | From | Martin Schwidefsky <> | Subject | [patch 04/10] sched: Add arch_update_cpu_topology hook. |
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From: Heiko Carstens <heiko.carstens@de.ibm.com>
Will be called each time the scheduling domains are rebuild. Needed for architectures that don't have a static cpu topology.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> ---
include/linux/topology.h | 2 ++ kernel/sched.c | 5 +++++ 2 files changed, 7 insertions(+)
Index: quilt-2.6/include/linux/topology.h =================================================================== --- quilt-2.6.orig/include/linux/topology.h +++ quilt-2.6/include/linux/topology.h @@ -50,6 +50,8 @@ for_each_online_node(node) \ if (nr_cpus_node(node)) +void arch_update_cpu_topology(void); + /* Conform to ACPI 2.0 SLIT distance definitions */ #define LOCAL_DISTANCE 10 #define REMOTE_DISTANCE 20 Index: quilt-2.6/kernel/sched.c =================================================================== --- quilt-2.6.orig/kernel/sched.c +++ quilt-2.6/kernel/sched.c @@ -6804,6 +6804,10 @@ static int ndoms_cur; /* number of sche */ static cpumask_t fallback_doms; +void __attribute__((weak)) arch_update_cpu_topology(void) +{ +} + /* * Set up scheduler domains and groups. Callers must hold the hotplug lock. * For now this just excludes isolated cpus, but could be used to @@ -6813,6 +6817,7 @@ static int arch_init_sched_domains(const { int err; + arch_update_cpu_topology(); ndoms_cur = 1; doms_cur = kmalloc(sizeof(cpumask_t), GFP_KERNEL); if (!doms_cur) -- blue skies, Martin.
"Reality continues to ruin my life." - Calvin.
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