blk-wbt: pass in enum wbt_flags to get_rq_wait()
This is in preparation for having more write queues, in which
case we would have needed to pass in more information than just
a simple 'is_kswapd' boolean.
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 3e34b41..25d2023 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -101,9 +101,13 @@
return time_before(jiffies, wb->dirty_sleep + HZ);
}
-static inline struct rq_wait *get_rq_wait(struct rq_wb *rwb, bool is_kswapd)
+static inline struct rq_wait *get_rq_wait(struct rq_wb *rwb,
+ enum wbt_flags wb_acct)
{
- return &rwb->rq_wait[is_kswapd];
+ if (wb_acct & WBT_KSWAPD)
+ return &rwb->rq_wait[WBT_RWQ_KSWAPD];
+
+ return &rwb->rq_wait[WBT_RWQ_BG];
}
static void rwb_wake_all(struct rq_wb *rwb)
@@ -126,7 +130,7 @@
if (!(wb_acct & WBT_TRACKED))
return;
- rqw = get_rq_wait(rwb, wb_acct & WBT_KSWAPD);
+ rqw = get_rq_wait(rwb, wb_acct);
inflight = atomic_dec_return(&rqw->inflight);
/*
@@ -529,11 +533,12 @@
* Block if we will exceed our limit, or if we are currently waiting for
* the timer to kick off queuing again.
*/
-static void __wbt_wait(struct rq_wb *rwb, unsigned long rw, spinlock_t *lock)
+static void __wbt_wait(struct rq_wb *rwb, enum wbt_flags wb_acct,
+ unsigned long rw, spinlock_t *lock)
__releases(lock)
__acquires(lock)
{
- struct rq_wait *rqw = get_rq_wait(rwb, current_is_kswapd());
+ struct rq_wait *rqw = get_rq_wait(rwb, wb_acct);
DEFINE_WAIT(wait);
if (may_queue(rwb, rqw, &wait, rw))
@@ -584,7 +589,7 @@
*/
enum wbt_flags wbt_wait(struct rq_wb *rwb, struct bio *bio, spinlock_t *lock)
{
- unsigned int ret = 0;
+ enum wbt_flags ret = 0;
if (!rwb_enabled(rwb))
return 0;
@@ -598,14 +603,14 @@
return ret;
}
- __wbt_wait(rwb, bio->bi_opf, lock);
+ if (current_is_kswapd())
+ ret |= WBT_KSWAPD;
+
+ __wbt_wait(rwb, ret, bio->bi_opf, lock);
if (!blk_stat_is_active(rwb->cb))
rwb_arm_timer(rwb);
- if (current_is_kswapd())
- ret |= WBT_KSWAPD;
-
return ret | WBT_TRACKED;
}