Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH 1/4] x86: set cpu masks before calling CPU_STARTING notifiers | Date | Thu, 18 Nov 2010 11:47:31 +0100 |
| |
From: Andi Kleen <ak@linux.intel.com>
When booting up a CPU set the various topology masks before calling the CPU_STARTING notifier. This way the notifier can actually use the masks.
This is needed for a perf change.
Signed-off-by: Andi Kleen <ak@linux.intel.com> --- arch/x86/kernel/smpboot.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 083e99d..9d2980e 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -281,6 +281,10 @@ static void __cpuinit smp_callin(void) */ smp_store_cpu_info(cpuid); + /* This must be done before setting cpu_online_mask */ + set_cpu_sibling_map(raw_smp_processor_id()); + wmb(); + notify_cpu_starting(cpuid); /* @@ -322,10 +326,6 @@ notrace static void __cpuinit start_secondary(void *unused) legacy_pic->unmask(0); } - /* This must be done before setting cpu_online_mask */ - set_cpu_sibling_map(raw_smp_processor_id()); - wmb(); - /* * We need to hold call_lock, so there is no inconsistency * between the time smp_call_function() determines number of -- 1.7.1
| |