The commit is pushed to "branch-rh7-3.10.0-514.6.1.vz7.28.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-514.6.1.vz7.28.5
------>
commit 1504fad026cef27546a781c13de46ea6b862b93a
Author: Andrey Ryabinin <aryabi...@virtuozzo.com>
Date: Thu Feb 9 18:32:53 2017 +0400
ve/sched: sched_show_task: call task_ve_name() under RCU lock
task_ve_name() requires rcu_read_lock() held.
===============================
[ INFO: suspicious RCU usage. ]
3.10.0-514.6.1.vz7.28.5.debug #1 Not tainted
Call Trace:
<IRQ> [<ffffffff82559001>] dump_stack+0x1e/0x20
[<ffffffff81339a25>] lockdep_rcu_suspicious+0x165/0x1c0
[<ffffffff8132a973>] task_ve_name+0xe3/0x130
[<ffffffff8126a044>] sched_show_task+0x1c4/0x320
[<ffffffff81278d08>] dump_cpu_task+0x78/0xe0
[<ffffffff814179e8>] rcu_dump_cpu_stacks+0x1d8/0x2a0
[<ffffffff81424b00>] rcu_check_callbacks+0x12e0/0x1f60
[<ffffffff811cc68d>] update_process_times+0x4d/0xc0
[<ffffffff8130643a>] tick_sched_handle.isra.13+0x5a/0x100
[<ffffffff8130826b>] tick_sched_timer+0x7b/0x130
[<ffffffff8122bcfd>] __hrtimer_run_queues+0x38d/0xe40
[<ffffffff813081f0>] ? tick_sched_do_timer+0x1e0/0x1e0
[<ffffffff8122b970>] ? hrtimer_start+0x40/0x40
[<ffffffff812f2f80>] ? ktime_get_update_offsets_now+0x1b0/0x2a0
[<ffffffff8122d3e0>] hrtimer_interrupt+0x180/0x420
[<ffffffff810fb036>] local_apic_timer_interrupt+0x76/0xf0
[<ffffffff8258dbfd>] smp_apic_timer_interrupt+0x7d/0xa0
[<ffffffff8258c072>] apic_timer_interrupt+0x72/0x80
https://jira.sw.ru/browse/PSBM-60139
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
---
kernel/sched/core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index cfd4bac..71eeb07 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5795,11 +5795,10 @@ void sched_show_task(struct task_struct *p)
#endif
rcu_read_lock();
ppid = task_pid_nr(rcu_dereference(p->real_parent));
- rcu_read_unlock();
printk(KERN_CONT "%5lu %5d %6d %4s 0x%08lx\n", free,
task_pid_nr(p), ppid,
task_ve_name(p), (unsigned long)task_thread_info(p)->flags);
-
+ rcu_read_unlock();
print_worker_info(KERN_INFO, p);
show_stack(p, NULL);
}
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