From: Zhang Qiao zhangqiao22@huawei.com
hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7WWMX CVE: NA
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------------[ cut here]------------ rq->clock_update_flags < RQCF_ACT_SKIP WARNING: CPU: 5 PID: 3312 at kernel/sched/sched.h:1223 update_curr+0x1e5/0x210 CPU: 5 PID: 3312 Comm: a.out Tainted: G S5.10.0.zq+ #1 Hardware name: Huawei RH2288H V3/BC11HGSA0, BIOS 3.35 10/20/2016 RIP: 0010:update_curr+0x1e5/0x210 enqueue_entity+0x378/0xd00 unthrottle_qos_cfs_rq+0x1bc/0x2a0 __unthrottle_qos_cfs_rqs+0x87/0xa0 qos_overload_timer_handler+0x35/0x60 __run_hrtimer+0x5e/0x190 __hrtimer_run_queues+0x81/0xe0 hrtimer_interrupt+0x110/0x2c0 __sysvec_apic_timer_interrupt+0x5f/0xd0 sysvec_apic_timer_interrupt+0x31/0x80 asm_sysvec_apic_timer_interrupt+0x12/0x20
After the last rq_pin_lock(), there is no rq clock update before calling enqueue_entity() at unthrottle_qos_cfs_rq();
This patch fixes it by updating rq clock before calling enqueue_entity().
Signed-off-by: Zhang Qiao zhangqiao22@huawei.com --- kernel/sched/fair.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index bf5aa616ee0d..2add3d9c19b7 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -8200,6 +8200,7 @@ static void unthrottle_qos_cfs_rq(struct cfs_rq *cfs_rq)
cfs_rq->throttled = 0;
+ update_rq_clock(rq); list_del_init(&cfs_rq->qos_throttled_list);
/* update hierarchical throttle state */