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| author | Jens Axboe <axboe@kernel.dk> | 2018-05-07 09:57:08 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-05-08 15:10:56 -0600 |
| commit | 8bea60901974ad44b06b08d52e1dd421ea8c6e9c (patch) | |
| tree | afd05bb8580a9e41afef562c639920307ceae486 | |
| parent | 825843b0adb7c95e8cbab35e6fee64980e29ade8 (diff) | |
| download | linux-0-day-8bea60901974ad44b06b08d52e1dd421ea8c6e9c.tar.gz linux-0-day-8bea60901974ad44b06b08d52e1dd421ea8c6e9c.tar.xz | |
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>
| -rw-r--r-- | block/blk-wbt.c | 25 | ||||
| -rw-r--r-- | block/blk-wbt.h | 4 |
2 files changed, 18 insertions, 11 deletions
diff --git a/block/blk-wbt.c b/block/blk-wbt.c index 3e34b41bcefc9..25d2023459653 100644 --- a/block/blk-wbt.c +++ b/block/blk-wbt.c @@ -101,9 +101,13 @@ static bool wb_recent_wait(struct rq_wb *rwb) 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 @@ void __wbt_done(struct rq_wb *rwb, enum wbt_flags wb_acct) 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 @@ static inline bool may_queue(struct rq_wb *rwb, struct rq_wait *rqw, * 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 @@ static inline bool wbt_should_throttle(struct rq_wb *rwb, struct bio *bio) */ 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 @@ enum wbt_flags wbt_wait(struct rq_wb *rwb, struct bio *bio, spinlock_t *lock) 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; } diff --git a/block/blk-wbt.h b/block/blk-wbt.h index a232c98fbf4d8..8038b4a0d4efc 100644 --- a/block/blk-wbt.h +++ b/block/blk-wbt.h @@ -19,7 +19,9 @@ enum wbt_flags { }; enum { - WBT_NUM_RWQ = 2, + WBT_RWQ_BG = 0, + WBT_RWQ_KSWAPD, + WBT_NUM_RWQ, }; /* |