lkml.org 
[lkml]   [2021]   [Jan]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] sched/core: add rcu_read_lock/unlock() protection
Date
From: Zqiang <qiang.zhang@windriver.com>

Due to for_each_process_thread belongs to RCU read operation,
need to add rcu_read_lock/unlock() protection.

Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
kernel/sched/core.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8c5481077c9c..c3f0103fdf53 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7738,6 +7738,7 @@ static void dump_rq_tasks(struct rq *rq, const char *loglvl)
lockdep_assert_held(&rq->lock);

printk("%sCPU%d enqueued tasks (%u total):\n", loglvl, cpu, rq->nr_running);
+ rcu_read_lock();
for_each_process_thread(g, p) {
if (task_cpu(p) != cpu)
continue;
@@ -7747,6 +7748,7 @@ static void dump_rq_tasks(struct rq *rq, const char *loglvl)

printk("%s\tpid: %d, name: %s\n", loglvl, p->pid, p->comm);
}
+ rcu_read_unlock();
}

int sched_cpu_dying(unsigned int cpu)
--
2.17.1
\
 
 \ /
  Last update: 2021-01-26 18:53    [W:0.037 / U:0.904 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site