On Mon, May 07, 2018 at 10:13:34AM -0600, Jens Axboe wrote: > 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. > > Signed-off-by: Jens Axboe <[email protected]>
Looks ok (having not run any kind of testing on this yet), Reviewed-by: Darrick J. Wong <[email protected]> --D > --- > block/blk-wbt.c | 25 +++++++++++++++---------- > 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 3e34b41bcefc..25d202345965 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 a232c98fbf4d..8038b4a0d4ef 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, > }; > > /* > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html
