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| author | Christoph Hellwig <hch@lst.de> | 2016-10-20 15:12:12 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-10-28 08:45:17 -0600 |
| commit | 8d2bbd4c8236e9e38e6b36ac9e2c54fdcfe5b335 (patch) | |
| tree | 63269c1f79d2648a350d307ef4179d89216f90ec | |
| parent | 188bd2b16b3c6ea87a90df20f33db0adcdb75f0c (diff) | |
| download | linux-0-day-8d2bbd4c8236e9e38e6b36ac9e2c54fdcfe5b335.tar.gz linux-0-day-8d2bbd4c8236e9e38e6b36ac9e2c54fdcfe5b335.tar.xz | |
block: replace REQ_THROTTLED with a bio flag
It's the last bio-only REQ_* flag, and we have space for it in the bio
bi_flags field.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-throttle.c | 10 | ||||
| -rw-r--r-- | include/linux/blk_types.h | 8 |
2 files changed, 7 insertions, 11 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index a3ea8260c94c8..a6bb4fe326c39 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -818,13 +818,13 @@ static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio) tg->io_disp[rw]++; /* - * REQ_THROTTLED is used to prevent the same bio to be throttled + * BIO_THROTTLED is used to prevent the same bio to be throttled * more than once as a throttled bio will go through blk-throtl the * second time when it eventually gets issued. Set it when a bio * is being charged to a tg. */ - if (!(bio->bi_opf & REQ_THROTTLED)) - bio->bi_opf |= REQ_THROTTLED; + if (!bio_flagged(bio, BIO_THROTTLED)) + bio_set_flag(bio, BIO_THROTTLED); } /** @@ -1401,7 +1401,7 @@ bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg, WARN_ON_ONCE(!rcu_read_lock_held()); /* see throtl_charge_bio() */ - if ((bio->bi_opf & REQ_THROTTLED) || !tg->has_rules[rw]) + if (bio_flagged(bio, BIO_THROTTLED) || !tg->has_rules[rw]) goto out; spin_lock_irq(q->queue_lock); @@ -1480,7 +1480,7 @@ out: * being issued. */ if (!throttled) - bio->bi_opf &= ~REQ_THROTTLED; + bio_clear_flag(bio, BIO_THROTTLED); return throttled; } diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 44f9bca332e51..6df722de2e226 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -119,6 +119,8 @@ struct bio { #define BIO_QUIET 6 /* Make BIO Quiet */ #define BIO_CHAIN 7 /* chained bio, ->bi_remaining in effect */ #define BIO_REFFED 8 /* bio has elevated ->bi_cnt */ +#define BIO_THROTTLED 9 /* This bio has already been subjected to + * throttling rules. Don't do it again. */ /* * Flags starting here get preserved by bio_reset() - this includes @@ -165,10 +167,6 @@ enum rq_flag_bits { __REQ_PREFLUSH, /* request for cache flush */ __REQ_RAHEAD, /* read ahead, can fail anytime */ - /* bio only flags */ - __REQ_THROTTLED, /* This bio has already been subjected to - * throttling rules. Don't do it again. */ - /* request only flags */ __REQ_SORTED, /* elevator knows about this request */ __REQ_SOFTBARRIER, /* may not be passed by ioscheduler */ @@ -213,8 +211,6 @@ enum rq_flag_bits { (REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_PREFLUSH | REQ_FUA | REQ_FLUSH_SEQ) #define REQ_RAHEAD (1ULL << __REQ_RAHEAD) -#define REQ_THROTTLED (1ULL << __REQ_THROTTLED) - #define REQ_SORTED (1ULL << __REQ_SORTED) #define REQ_SOFTBARRIER (1ULL << __REQ_SOFTBARRIER) #define REQ_FUA (1ULL << __REQ_FUA) |