Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752717AbaKQTIM (ORCPT ); Mon, 17 Nov 2014 14:08:12 -0500 Received: from mail-wi0-f181.google.com ([209.85.212.181]:50624 "EHLO mail-wi0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751836AbaKQTIH (ORCPT ); Mon, 17 Nov 2014 14:08:07 -0500 From: Stephane Eranian To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, mingo@elte.hu, ak@linux.intel.com, jolsa@redhat.com, kan.liang@intel.com, bp@alien8.de, maria.n.dimakopoulou@gmail.com Subject: [PATCH v3 02/13] perf/x86: vectorize cpuc->kfree_on_online Date: Mon, 17 Nov 2014 20:06:54 +0100 Message-Id: <1416251225-17721-3-git-send-email-eranian@google.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1416251225-17721-1-git-send-email-eranian@google.com> References: <1416251225-17721-1-git-send-email-eranian@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Make the cpuc->kfree_on_online a vector to accommodate more than one entry and add the second entry to be used by a later patch. Reviewed-by: Maria Dimakopoulou Signed-off-by: Stephane Eranian --- arch/x86/kernel/cpu/perf_event.c | 10 +++++++--- arch/x86/kernel/cpu/perf_event.h | 8 +++++++- arch/x86/kernel/cpu/perf_event_amd.c | 3 ++- arch/x86/kernel/cpu/perf_event_intel.c | 4 +++- 4 files changed, 19 insertions(+), 6 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 143e5f5..633a4b7 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1317,11 +1317,12 @@ x86_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu) { unsigned int cpu = (long)hcpu; struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu); - int ret = NOTIFY_OK; + int i, ret = NOTIFY_OK; switch (action & ~CPU_TASKS_FROZEN) { case CPU_UP_PREPARE: - cpuc->kfree_on_online = NULL; + for (i = 0 ; i < X86_PERF_KFREE_MAX; i++) + cpuc->kfree_on_online[i] = NULL; if (x86_pmu.cpu_prepare) ret = x86_pmu.cpu_prepare(cpu); break; @@ -1334,7 +1335,10 @@ x86_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu) break; case CPU_ONLINE: - kfree(cpuc->kfree_on_online); + for (i = 0 ; i < X86_PERF_KFREE_MAX; i++) { + kfree(cpuc->kfree_on_online[i]); + cpuc->kfree_on_online[i] = NULL; + } break; case CPU_DYING: diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h index 6a6b4e4..418e30d 100644 --- a/arch/x86/kernel/cpu/perf_event.h +++ b/arch/x86/kernel/cpu/perf_event.h @@ -123,6 +123,12 @@ struct intel_shared_regs { #define MAX_LBR_ENTRIES 16 +enum { + X86_PERF_KFREE_SHARED = 0, + X86_PERF_KFREE_EXCL = 1, + X86_PERF_KFREE_MAX +}; + struct cpu_hw_events { /* * Generic x86 PMC bits @@ -185,7 +191,7 @@ struct cpu_hw_events { /* Inverted mask of bits to clear in the perf_ctr ctrl registers */ u64 perf_ctr_virt_mask; - void *kfree_on_online; + void *kfree_on_online[X86_PERF_KFREE_MAX]; }; #define __EVENT_CONSTRAINT(c, n, m, w, o, f) {\ diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c index 2892631..e4302b8 100644 --- a/arch/x86/kernel/cpu/perf_event_amd.c +++ b/arch/x86/kernel/cpu/perf_event_amd.c @@ -382,6 +382,7 @@ static int amd_pmu_cpu_prepare(int cpu) static void amd_pmu_cpu_starting(int cpu) { struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu); + void **onln = &cpuc->kfree_on_online[X86_PERF_KFREE_SHARED]; struct amd_nb *nb; int i, nb_id; @@ -399,7 +400,7 @@ static void amd_pmu_cpu_starting(int cpu) continue; if (nb->nb_id == nb_id) { - cpuc->kfree_on_online = cpuc->amd_nb; + *onln = cpuc->amd_nb; cpuc->amd_nb = nb; break; } diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index 47d7357..9345194 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c @@ -2011,12 +2011,14 @@ static void intel_pmu_cpu_starting(int cpu) return; if (!(x86_pmu.flags & PMU_FL_NO_HT_SHARING)) { + void **onln = &cpuc->kfree_on_online[X86_PERF_KFREE_SHARED]; + for_each_cpu(i, topology_thread_cpumask(cpu)) { struct intel_shared_regs *pc; pc = per_cpu(cpu_hw_events, i).shared_regs; if (pc && pc->core_id == core_id) { - cpuc->kfree_on_online = cpuc->shared_regs; + *onln = cpuc->shared_regs; cpuc->shared_regs = pc; break; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/