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authorDouglas Anderson <dianders@chromium.org>2020-04-20 19:24:52 +0300
committerJens Axboe <axboe@kernel.dk>2020-04-20 19:34:56 +0300
commitb9151e7bca82a17ff7aa442a168e0f924a07443c (patch)
tree7543cdcf5bddfd8020e3bdf52579648053418aea /block
parentab3cee3762e5e69f27c302c43691289fdfc12316 (diff)
downloadlinux-b9151e7bca82a17ff7aa442a168e0f924a07443c.tar.xz
blk-mq: Add blk_mq_delay_run_hw_queues() API call
We have: * blk_mq_run_hw_queue() * blk_mq_delay_run_hw_queue() * blk_mq_run_hw_queues() ...but not blk_mq_delay_run_hw_queues(), presumably because nobody needed it before now. Since we need it for a later patch in this series, add it. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1c4bedf500c5..cf95e8e0881a 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1546,6 +1546,25 @@ void blk_mq_run_hw_queues(struct request_queue *q, bool async)
EXPORT_SYMBOL(blk_mq_run_hw_queues);
/**
+ * blk_mq_delay_run_hw_queues - Run all hardware queues asynchronously.
+ * @q: Pointer to the request queue to run.
+ * @msecs: Microseconds of delay to wait before running the queues.
+ */
+void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs)
+{
+ struct blk_mq_hw_ctx *hctx;
+ int i;
+
+ queue_for_each_hw_ctx(q, hctx, i) {
+ if (blk_mq_hctx_stopped(hctx))
+ continue;
+
+ blk_mq_delay_run_hw_queue(hctx, msecs);
+ }
+}
+EXPORT_SYMBOL(blk_mq_delay_run_hw_queues);
+
+/**
* blk_mq_queue_stopped() - check whether one or more hctxs have been stopped
* @q: request queue.
*