perf, x86: Extract PEBS/BTS buffer free routines (b39f88ac) · Commits · 戴 / test

arch/x86/kernel/cpu/perf_event_intel_ds.c

+25 −5

Original line number	Diff line number	Diff line
		@@ -74,6 +74,28 @@ static void fini_debug_store_on_cpu(int cpu)
		wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA, 0, 0);
		}

		static void release_pebs_buffer(int cpu)
		{
		struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;

		if (!ds \|\| !x86_pmu.pebs)
		return;

		kfree((void *)(unsigned long)ds->pebs_buffer_base);
		ds->pebs_buffer_base = 0;
		}

		static void release_bts_buffer(int cpu)
		{
		struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;

		if (!ds \|\| !x86_pmu.bts)
		return;

		kfree((void *)(unsigned long)ds->bts_buffer_base);
		ds->bts_buffer_base = 0;
		}

		static void release_ds_buffers(void)
		{
		int cpu;
		@@ -82,7 +104,6 @@ static void release_ds_buffers(void)
		return;

		get_online_cpus();

		for_each_online_cpu(cpu)
		fini_debug_store_on_cpu(cpu);

		@@ -92,13 +113,12 @@ static void release_ds_buffers(void)
		if (!ds)
		continue;

		per_cpu(cpu_hw_events, cpu).ds = NULL;
		release_pebs_buffer(cpu);
		release_bts_buffer(cpu);

		kfree((void *)(unsigned long)ds->pebs_buffer_base);
		kfree((void *)(unsigned long)ds->bts_buffer_base);
		per_cpu(cpu_hw_events, cpu).ds = NULL;
		kfree(ds);
		}

		put_online_cpus();
		}