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blk-wbt: remove the separate write cache tracking 

Use the queue wide write back cache tracking insted of duplicating the
value in strut rq_wb.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231226090747.204969-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-12-26 09:07:47 +00:00 committed by Jens Axboe
parent 1c042f8d4b
commit 5d13243820
3 changed files with 2 additions and 18 deletions
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2
block/blk-settings.c
View File

@ -837,8 +837,6 @@ void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua)
blk_queue_flag_set(QUEUE_FLAG_FUA, q);
else
blk_queue_flag_clear(QUEUE_FLAG_FUA, q);
wbt_set_write_cache(q, test_bit(QUEUE_FLAG_WC, &q->queue_flags));
}
EXPORT_SYMBOL_GPL(blk_queue_write_cache);

13
block/blk-wbt.c
View File

@ -84,8 +84,6 @@ struct rq_wb {
u64 sync_issue;
void *sync_cookie;
unsigned int wc;
unsigned long last_issue; /* last non-throttled issue */
unsigned long last_comp; /* last non-throttled comp */
unsigned long min_lat_nsec;
@ -207,7 +205,8 @@ static void wbt_rqw_done(struct rq_wb *rwb, struct rq_wait *rqw,
*/
if (wb_acct & WBT_DISCARD)
limit = rwb->wb_background;
else if (rwb->wc && !wb_recent_wait(rwb))
else if (test_bit(QUEUE_FLAG_WC, &rwb->rqos.disk->queue->queue_flags) &&
!wb_recent_wait(rwb))
limit = 0;
else
limit = rwb->wb_normal;
@ -699,13 +698,6 @@ static void wbt_requeue(struct rq_qos *rqos, struct request *rq)
}
}
void wbt_set_write_cache(struct request_queue *q, bool write_cache_on)
{
struct rq_qos *rqos = wbt_rq_qos(q);
if (rqos)
RQWB(rqos)->wc = write_cache_on;
}
/*
* Enable wbt if defaults are configured that way
*/
@ -918,7 +910,6 @@ int wbt_init(struct gendisk *disk)
rwb->last_comp = rwb->last_issue = jiffies;
rwb->win_nsec = RWB_WINDOW_NSEC;
rwb->enable_state = WBT_STATE_ON_DEFAULT;
rwb->wc = test_bit(QUEUE_FLAG_WC, &q->queue_flags);
rwb->rq_depth.default_depth = RWB_DEF_DEPTH;
rwb->min_lat_nsec = wbt_default_latency_nsec(q);
rwb->rq_depth.queue_depth = blk_queue_depth(q);

5
block/blk-wbt.h
View File

@ -12,8 +12,6 @@ u64 wbt_get_min_lat(struct request_queue *q);
void wbt_set_min_lat(struct request_queue *q, u64 val);
bool wbt_disabled(struct request_queue *);
void wbt_set_write_cache(struct request_queue *, bool);
u64 wbt_default_latency_nsec(struct request_queue *);
#else
@ -24,9 +22,6 @@ static inline void wbt_disable_default(struct gendisk *disk)
static inline void wbt_enable_default(struct gendisk *disk)
{
}
static inline void wbt_set_write_cache(struct request_queue *q, bool wc)
{
}
#endif /* CONFIG_BLK_WBT */