* [PATCH] io-wq: fix 'task->pi_lock' spin lock protect
@ 2020-10-23 6:20 qiang.zhang
2020-10-23 13:23 ` Jens Axboe
0 siblings, 1 reply; 2+ messages in thread
From: qiang.zhang @ 2020-10-23 6:20 UTC (permalink / raw)
To: axboe; +Cc: viro, linux-fsdevel, io-uring, linux-kernel
From: Zqiang <qiang.zhang@windriver.com>
The set CPU affinity func 'do_set_cpus_allowed' may be operate
'task_rq', need add rq lock protect, replace 'pi_lock' spinlock
protect with task_rq_lock func.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
---
fs/io-wq.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/io-wq.c b/fs/io-wq.c
index d3165ce339c2..6ea3e0224e63 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -1209,11 +1209,13 @@ static bool io_wq_worker_affinity(struct io_worker *worker, void *data)
{
struct task_struct *task = worker->task;
unsigned long flags;
+ struct rq_flags rf;
+ struct rq *rq;
- raw_spin_lock_irqsave(&task->pi_lock, flags);
+ rq = task_rq_lock(task, &rf);
do_set_cpus_allowed(task, cpumask_of_node(worker->wqe->node));
task->flags |= PF_NO_SETAFFINITY;
- raw_spin_unlock_irqrestore(&task->pi_lock, flags);
+ task_rq_unlock(rq, task, &rf);
return false;
}
--
2.17.1
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2020-10-23 13:23 ` Jens Axboe
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