blk-mq: turn hctx->run_work into a regular work struct

We don't need the larger delayed work struct, since we always run it
immediately.

Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/block/blk-core.c b/block/blk-core.c
index 2d08597..34ff808 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -288,7 +288,7 @@ void blk_sync_queue(struct request_queue *q)
                int i;
 
                queue_for_each_hw_ctx(q, hctx, i) {
-                       cancel_delayed_work_sync(&hctx->run_work);
+                       cancel_work_sync(&hctx->run_work);
                        cancel_delayed_work_sync(&hctx->delay_work);
                }
        } else {

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 13f5a6c..b68fdcb 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -936,8 +936,7 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async)
                put_cpu();
        }
 
-       kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx),
-                       &hctx->run_work, 0);
+       kblockd_schedule_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work);
 }
 
 void blk_mq_run_hw_queues(struct request_queue *q, bool async)
@@ -958,7 +957,7 @@ EXPORT_SYMBOL(blk_mq_run_hw_queues);
 
 void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)
 {
-       cancel_delayed_work(&hctx->run_work);
+       cancel_work(&hctx->run_work);
        cancel_delayed_work(&hctx->delay_work);
        set_bit(BLK_MQ_S_STOPPED, &hctx->state);
 }
@@ -1011,7 +1010,7 @@ static void blk_mq_run_work_fn(struct work_struct *work)
 {
        struct blk_mq_hw_ctx *hctx;
 
-       hctx = container_of(work, struct blk_mq_hw_ctx, run_work.work);
+       hctx = container_of(work, struct blk_mq_hw_ctx, run_work);
 
        __blk_mq_run_hw_queue(hctx);
 }
@@ -1722,7 +1721,7 @@ static int blk_mq_init_hctx(struct request_queue *q,
        if (node == NUMA_NO_NODE)
                node = hctx->numa_node = set->numa_node;
 
-       INIT_DELAYED_WORK(&hctx->run_work, blk_mq_run_work_fn);
+       INIT_WORK(&hctx->run_work, blk_mq_run_work_fn);
        INIT_DELAYED_WORK(&hctx->delay_work, blk_mq_delay_work_fn);
        spin_lock_init(&hctx->lock);
        INIT_LIST_HEAD(&hctx->dispatch);

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index e43bbff..d579252 100644 (file)
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -25,7 +25,7 @@ struct blk_mq_hw_ctx {
        } ____cacheline_aligned_in_smp;
 
        unsigned long           state;          /* BLK_MQ_S_* flags */
-       struct delayed_work     run_work;
+       struct work_struct      run_work;
        struct delayed_work     delay_work;
        cpumask_var_t           cpumask;
        int                     next_cpu;