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block: soft limit zone-append sectors as well 

Martin rightfully noted that for normal filesystem IO we have soft limits
in place, to prevent them from getting too big and not lead to
unpredictable latencies. For zone append we only have the hardware limit
in place.

Cap the max sectors we submit via zone-append to the maximal number of
sectors if the second limit is lower.

Reported-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/linux-btrfs/yq1k0w8g3rw.fsf@ca-mkp.ca.oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Johannes Thumshirn 2020-10-07 21:35:08 +09:00 committed by Jens Axboe
parent a926c7afff
commit fe6f0cdc49
1 changed files with 4 additions and 1 deletions
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5
include/linux/blkdev.h
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@ -1407,7 +1407,10 @@ static inline unsigned int queue_max_segment_size(const struct request_queue *q)
static inline unsigned int queue_max_zone_append_sectors(const struct request_queue *q)
{
return q->limits.max_zone_append_sectors;
const struct queue_limits *l = &q->limits;
return min(l->max_zone_append_sectors, l->max_sectors);
}
static inline unsigned queue_logical_block_size(const struct request_queue *q)