Currently only 1 pointer can be freed using kfree_on_online mechanism,
allow for multiple.
Signed-off-by: Jacob Shin <jacob.s...@amd.com>
---
arch/x86/kernel/cpu/perf_event.c | 7 +++++--
arch/x86/kernel/cpu/perf_event.h | 3 ++-
arch/x86/kernel/cpu/perf_event_amd.c | 2 +-
arch/x86/kernel/cpu/perf_event_intel.c | 2 +-
4 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index bf0f01a..64c4b7a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1258,10 +1258,12 @@ 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;
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
- cpuc->kfree_on_online = NULL;
+ for (i = 0; i < MAX_KFREE_ON_ONLINE; i++)
+ cpuc->kfree_on_online[i] = NULL;
if (x86_pmu.cpu_prepare)
ret = x86_pmu.cpu_prepare(cpu);
break;
@@ -1274,7 +1276,8 @@ 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 < MAX_KFREE_ON_ONLINE; i++)
+ kfree(cpuc->kfree_on_online[i]);
break;
case CPU_DYING:
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index fdaac69..770f3b99 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -111,6 +111,7 @@ struct intel_shared_regs {
};
#define MAX_LBR_ENTRIES 16
+#define MAX_KFREE_ON_ONLINE 4
struct cpu_hw_events {
/*
@@ -167,7 +168,7 @@ 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[MAX_KFREE_ON_ONLINE];
};
#define __EVENT_CONSTRAINT(c, n, m, w, o) {\
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c
b/arch/x86/kernel/cpu/perf_event_amd.c
index 23964a6..36b5162 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -505,7 +505,7 @@ static void amd_pmu_cpu_starting(int cpu)
continue;
if (nb->id == nb_id) {
- cpuc->kfree_on_online = cpuc->amd_nb;
+ cpuc->kfree_on_online[0] = 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 dab7580..f79a0c5 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1719,7 +1719,7 @@ static void intel_pmu_cpu_starting(int cpu)
pc = per_cpu(cpu_hw_events, i).shared_regs;
if (pc && pc->core_id == core_id) {
- cpuc->kfree_on_online = cpuc->shared_regs;
+ cpuc->kfree_on_online[0] = cpuc->shared_regs;
cpuc->shared_regs = pc;
break;
}
--
1.7.9.5
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