Commit 1d536414 authored Jun 05, 2024 by Ze Zuo

sched: Enable per-process mem_sampling from sched switch path

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I9GZAQ


CVE: NA

--------------------------------

Program mem_sampling for access profiling for threads from the
task sched switch path. mem_sampling is programmed with a period
that corresponds to the incoming thread. Kernel threads are
excluded from this.

Signed-off-by: Ze Zuo <zuoze1@huawei.com>
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
Signed-off-by: Shuang Yan <yanshuang7@huawei.com>

parent 9878268b

kernel/sched/core.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@

		#include <linux/kcov.h>
		#include <linux/scs.h>
		#include <linux/mem_sampling.h>

		#include <asm/irq_regs.h>
		#include <asm/switch_to.h>
		@@ -4066,6 +4067,7 @@ static struct rq finish_task_switch(struct task_struct prev)
		prev_state = prev->state;
		vtime_task_switch(prev);
		perf_event_task_sched_in(prev, current);
		mem_sampling_sched_in(prev, current);
		finish_task(prev);
		tick_nohz_task_switch();
		finish_lock_switch(rq);