Commit-ID: 53b441a565bf4036ab49c8ea04c5ad06ace7dd6b Gitweb: http://git.kernel.org/tip/53b441a565bf4036ab49c8ea04c5ad06ace7dd6b Author: Ingo Molnar <mingo@xxxxxxx> AuthorDate: Mon, 25 May 2009 21:41:28 +0200 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Mon, 25 May 2009 21:41:28 +0200 Revert "perf_counter, x86: speed up the scheduling fast-path" This reverts commit b68f1d2e7aa21029d73c7d453a8046e95d351740. It is causing problems (stuck/stuttering profiling) - when mixed NMI and non-NMI counters are used. Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: John Kacur <jkacur@xxxxxxxxxx> LKML-Reference: <20090525153931.703093461@xxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- arch/x86/kernel/cpu/perf_counter.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c index c4b543d..189bf9d 100644 --- a/arch/x86/kernel/cpu/perf_counter.c +++ b/arch/x86/kernel/cpu/perf_counter.c @@ -293,7 +293,6 @@ static int __hw_perf_counter_init(struct perf_counter *counter) return -EACCES; hwc->nmi = 1; } - perf_counters_lapic_init(hwc->nmi); if (!hwc->irq_period) hwc->irq_period = x86_pmu.max_period; @@ -612,6 +611,8 @@ try_generic: hwc->counter_base = x86_pmu.perfctr; } + perf_counters_lapic_init(hwc->nmi); + x86_pmu.disable(hwc, idx); cpuc->counters[idx] = counter; @@ -1037,7 +1038,7 @@ void __init init_hw_perf_counters(void) pr_info("... counter mask: %016Lx\n", perf_counter_mask); - perf_counters_lapic_init(1); + perf_counters_lapic_init(0); register_die_notifier(&perf_counter_nmi_notifier); } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html