blk-mq: unify hctx delayed_run_work and run_work
They serve the exact same purpose. Get rid of the non-delayed
work variant, and just run it without delay for the normal case.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/blk-core.c b/block/blk-core.c
index 6bd4d17..3793967 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -269,7 +269,7 @@
int i;
queue_for_each_hw_ctx(q, hctx, i) {
- cancel_work_sync(&hctx->run_work);
+ cancel_delayed_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 e6aad49..5c68fce 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1166,13 +1166,9 @@
put_cpu();
}
- if (msecs == 0)
- kblockd_schedule_work_on(blk_mq_hctx_next_cpu(hctx),
- &hctx->run_work);
- else
- kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx),
- &hctx->delayed_run_work,
- msecs_to_jiffies(msecs));
+ kblockd_schedule_delayed_work_on(blk_mq_hctx_next_cpu(hctx),
+ &hctx->run_work,
+ msecs_to_jiffies(msecs));
}
void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs)
@@ -1224,7 +1220,7 @@
void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)
{
- cancel_work(&hctx->run_work);
+ cancel_delayed_work_sync(&hctx->run_work);
cancel_delayed_work(&hctx->delay_work);
set_bit(BLK_MQ_S_STOPPED, &hctx->state);
}
@@ -1282,17 +1278,7 @@
{
struct blk_mq_hw_ctx *hctx;
- hctx = container_of(work, struct blk_mq_hw_ctx, run_work);
-
- __blk_mq_run_hw_queue(hctx);
-}
-
-static void blk_mq_delayed_run_work_fn(struct work_struct *work)
-{
- struct blk_mq_hw_ctx *hctx;
-
- hctx = container_of(work, struct blk_mq_hw_ctx, delayed_run_work.work);
-
+ hctx = container_of(work, struct blk_mq_hw_ctx, run_work.work);
__blk_mq_run_hw_queue(hctx);
}
@@ -1898,8 +1884,7 @@
if (node == NUMA_NO_NODE)
node = hctx->numa_node = set->numa_node;
- INIT_WORK(&hctx->run_work, blk_mq_run_work_fn);
- INIT_DELAYED_WORK(&hctx->delayed_run_work, blk_mq_delayed_run_work_fn);
+ INIT_DELAYED_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 32bd8eb..c7cc903 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -15,7 +15,7 @@
unsigned long state; /* BLK_MQ_S_* flags */
} ____cacheline_aligned_in_smp;
- struct work_struct run_work;
+ struct delayed_work run_work;
cpumask_var_t cpumask;
int next_cpu;
int next_cpu_batch;
@@ -51,7 +51,6 @@
atomic_t nr_active;
- struct delayed_work delayed_run_work;
struct delayed_work delay_work;
struct hlist_node cpuhp_dead;