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Date: Thu, 18 Nov 2010 11:47:31 +0100 From: Andi Kleen <andi@...stfloor.org> To: a.p.zijlstra@...llo.nl Cc: eranian@...gle.com, linux-kernel@...r.kernel.org, x86@...nel.org, Andi Kleen <ak@...ux.intel.com> Subject: [PATCH 1/4] x86: set cpu masks before calling CPU_STARTING notifiers From: Andi Kleen <ak@...ux.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@...ux.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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