diff options
| -rw-r--r-- | block/blk-wbt.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/block/blk-wbt.c b/block/blk-wbt.c index 6dfc659d22e2..8b73c0c11aec 100644 --- a/block/blk-wbt.c +++ b/block/blk-wbt.c @@ -136,8 +136,9 @@ enum { RWB_MIN_WRITE_SAMPLES = 3, /* - * If we have this number of consecutive windows with not enough - * information to scale up or down, scale up. + * If we have this number of consecutive windows without enough + * information to scale up or down, slowly return to center state + * (step == 0). */ RWB_UNKNOWN_BUMP = 5, }; @@ -638,11 +639,7 @@ static void wbt_cleanup(struct rq_qos *rqos, struct bio *bio) __wbt_done(rqos, flags); } -/* - * May sleep, if we have exceeded the writeback limits. Caller can pass - * in an irq held spinlock, if it holds one when calling this function. - * If we do sleep, we'll release and re-grab it. - */ +/* May sleep, if we have exceeded the writeback limits. */ static void wbt_wait(struct rq_qos *rqos, struct bio *bio) { struct rq_wb *rwb = RQWB(rqos); |