Re: [PATCH v6 1/4] block: add blk_mq_is_queue_frozen()
From: Christoph Hellwig <hch@infradead.org>
Date: 2021-03-09 17:21:05
Also in:
dm-devel, linux-api, linux-raid, lkml
On Wed, Mar 03, 2021 at 03:30:15PM +0300, Sergei Shtepa wrote:
+bool blk_mq_is_queue_frozen(struct request_queue *q)
+{
+ bool ret;
+
+ mutex_lock(&q->mq_freeze_lock);
+ ret = percpu_ref_is_dying(&q->q_usage_counter) && percpu_ref_is_zero(&q->q_usage_counter);Please avoid the overly long line. Also maybe frozen is a better name for the variable currently called ret?