diff options
author | Christoph Hellwig <hch@lst.de> | 2024-11-08 16:46:51 +0100 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2024-11-11 09:20:36 -0700 |
commit | 559218d43ec9dde3d2847c7aa127e88d6ab1c9ed (patch) | |
tree | c17616ebdb0586770eb78eaf26ca136abb89b12b /block | |
parent | 0ef2b9e698dbf9ba78f67952a747f35eb7060470 (diff) |
block: pre-calculate max_zone_append_sectors
max_zone_append_sectors differs from all other queue limits in that the
final value used is not stored in the queue_limits but needs to be
obtained using queue_limits_max_zone_append_sectors helper. This not
only adds (tiny) extra overhead to the I/O path, but also can be easily
forgotten in file system code.
Add a new max_hw_zone_append_sectors value to queue_limits which is
set by the driver, and calculate max_zone_append_sectors from that and
the other inputs in blk_validate_zoned_limits, similar to how
max_sectors is calculated to fix this.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241104073955.112324-3-hch@lst.de
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20241108154657.845768-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r-- | block/blk-core.c | 2 | ||||
-rw-r--r-- | block/blk-merge.c | 3 | ||||
-rw-r--r-- | block/blk-settings.c | 27 | ||||
-rw-r--r-- | block/blk-sysfs.c | 17 |
4 files changed, 18 insertions, 31 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 4f791a3114a1..0387172e8259 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -607,7 +607,7 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q, return BLK_STS_IOERR; /* Make sure the BIO is small enough and will not get split */ - if (nr_sectors > queue_max_zone_append_sectors(q)) + if (nr_sectors > q->limits.max_zone_append_sectors) return BLK_STS_IOERR; bio->bi_opf |= REQ_NOMERGE; diff --git a/block/blk-merge.c b/block/blk-merge.c index 859875a5ee90..7b0af8317c1c 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -392,11 +392,10 @@ struct bio *bio_split_rw(struct bio *bio, const struct queue_limits *lim, struct bio *bio_split_zone_append(struct bio *bio, const struct queue_limits *lim, unsigned *nr_segs) { - unsigned int max_sectors = queue_limits_max_zone_append_sectors(lim); int split_sectors; split_sectors = bio_split_rw_at(bio, lim, nr_segs, - max_sectors << SECTOR_SHIFT); + lim->max_zone_append_sectors << SECTOR_SHIFT); if (WARN_ON_ONCE(split_sectors > 0)) split_sectors = -EINVAL; return bio_submit_split(bio, split_sectors); diff --git a/block/blk-settings.c b/block/blk-settings.c index 5ee3d6d1448d..7d6b296997c2 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -50,7 +50,7 @@ void blk_set_stacking_limits(struct queue_limits *lim) lim->max_sectors = UINT_MAX; lim->max_dev_sectors = UINT_MAX; lim->max_write_zeroes_sectors = UINT_MAX; - lim->max_zone_append_sectors = UINT_MAX; + lim->max_hw_zone_append_sectors = UINT_MAX; lim->max_user_discard_sectors = UINT_MAX; } EXPORT_SYMBOL(blk_set_stacking_limits); @@ -91,17 +91,16 @@ static int blk_validate_zoned_limits(struct queue_limits *lim) if (lim->zone_write_granularity < lim->logical_block_size) lim->zone_write_granularity = lim->logical_block_size; - if (lim->max_zone_append_sectors) { - /* - * The Zone Append size is limited by the maximum I/O size - * and the zone size given that it can't span zones. - */ - lim->max_zone_append_sectors = - min3(lim->max_hw_sectors, - lim->max_zone_append_sectors, - lim->chunk_sectors); - } - + /* + * The Zone Append size is limited by the maximum I/O size and the zone + * size given that it can't span zones. + * + * If no max_hw_zone_append_sectors limit is provided, the block layer + * will emulated it, else we're also bound by the hardware limit. + */ + lim->max_zone_append_sectors = + min_not_zero(lim->max_hw_zone_append_sectors, + min(lim->chunk_sectors, lim->max_hw_sectors)); return 0; } @@ -527,8 +526,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->max_dev_sectors = min_not_zero(t->max_dev_sectors, b->max_dev_sectors); t->max_write_zeroes_sectors = min(t->max_write_zeroes_sectors, b->max_write_zeroes_sectors); - t->max_zone_append_sectors = min(queue_limits_max_zone_append_sectors(t), - queue_limits_max_zone_append_sectors(b)); + t->max_hw_zone_append_sectors = min(t->max_hw_zone_append_sectors, + b->max_hw_zone_append_sectors); t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask, b->seg_boundary_mask); diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 0ef4e13e247d..d80a202cd170 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -131,6 +131,7 @@ QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(max_hw_discard_sectors) QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(max_write_zeroes_sectors) QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(atomic_write_max_sectors) QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(atomic_write_boundary_sectors) +QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(max_zone_append_sectors) #define QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(_field) \ static ssize_t queue_##_field##_show(struct gendisk *disk, char *page) \ @@ -178,18 +179,6 @@ static ssize_t queue_max_discard_sectors_store(struct gendisk *disk, return ret; } -/* - * For zone append queue_max_zone_append_sectors does not just return the - * underlying queue limits, but actually contains a calculation. Because of - * that we can't simply use QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES here. - */ -static ssize_t queue_zone_append_max_show(struct gendisk *disk, char *page) -{ - return sprintf(page, "%llu\n", - (u64)queue_max_zone_append_sectors(disk->queue) << - SECTOR_SHIFT); -} - static ssize_t queue_max_sectors_store(struct gendisk *disk, const char *page, size_t count) { @@ -479,7 +468,7 @@ QUEUE_RO_ENTRY(queue_atomic_write_unit_min, "atomic_write_unit_min_bytes"); QUEUE_RO_ENTRY(queue_write_same_max, "write_same_max_bytes"); QUEUE_RO_ENTRY(queue_max_write_zeroes_sectors, "write_zeroes_max_bytes"); -QUEUE_RO_ENTRY(queue_zone_append_max, "zone_append_max_bytes"); +QUEUE_RO_ENTRY(queue_max_zone_append_sectors, "zone_append_max_bytes"); QUEUE_RO_ENTRY(queue_zone_write_granularity, "zone_write_granularity"); QUEUE_RO_ENTRY(queue_zoned, "zoned"); @@ -607,7 +596,7 @@ static struct attribute *queue_attrs[] = { &queue_atomic_write_unit_max_entry.attr, &queue_write_same_max_entry.attr, &queue_max_write_zeroes_sectors_entry.attr, - &queue_zone_append_max_entry.attr, + &queue_max_zone_append_sectors_entry.attr, &queue_zone_write_granularity_entry.attr, &queue_rotational_entry.attr, &queue_zoned_entry.attr, |