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bcache: move calculation of stripe_size and io_opt into bcache_device_init 

bcache currently calculates the stripe size for the non-cached_dev
case directly in bcache_device_init, but for the cached_dev case it does
it in the caller.  Consolidate it in one places, which also enables
setting the io_opt queue_limit before allocating the gendisk so that it
can be passed in instead of changing the limit just after the allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Coly Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20240226104826.283067-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2024-02-26 11:48:26 +01:00 committed by Jens Axboe
parent 0e46064ebe
commit 34a2cf3fbe
1 changed files with 5 additions and 6 deletions
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11
drivers/md/bcache/super.c
View File

@ -913,6 +913,10 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
uint64_t n;
int idx;
if (cached_bdev) {
d->stripe_size = bdev_io_opt(cached_bdev) >> SECTOR_SHIFT;
lim.io_opt = umax(block_size, bdev_io_opt(cached_bdev));
}
if (!d->stripe_size)
d->stripe_size = 1 << 31;
else if (d->stripe_size < BCH_MIN_STRIPE_SZ)
@ -1418,9 +1422,7 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
hlist_add_head(&io->hash, dc->io_hash + RECENT_IO);
}
dc->disk.stripe_size = q->limits.io_opt >> 9;
if (dc->disk.stripe_size)
if (bdev_io_opt(dc->bdev))
dc->partial_stripes_expensive =
q->limits.raid_partial_stripes_expensive;
@ -1430,9 +1432,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size)
if (ret)
return ret;
blk_queue_io_opt(dc->disk.disk->queue,
max(queue_io_opt(dc->disk.disk->queue), queue_io_opt(q)));
atomic_set(&dc->io_errors, 0);
dc->io_disable = false;
dc->error_limit = DEFAULT_CACHED_DEV_ERROR_LIMIT;