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bcache: discard_granularity should not be smaller than a sector

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Just like all block I/O, discards are in units of sectors.  Thus setting a
smaller than sector size discard limit in case of > 512 byte sectors in
bcache doesn't make sense.  Always set the discard granularity to 512
bytes instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231228075545.362768-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-12-28 07:55:38 +00:00 committed by Jens Axboe
parent 928a5dd3a8
commit 5e7169e7f7
1 changed files with 1 additions and 1 deletions
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2
drivers/md/bcache/super.c
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@ -954,7 +954,7 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
q->limits.max_segment_size = UINT_MAX;
q->limits.max_segments = BIO_MAX_VECS;
blk_queue_max_discard_sectors(q, UINT_MAX);
q->limits.discard_granularity = 512;
q->limits.discard_granularity = block_size;
q->limits.io_min = block_size;
q->limits.logical_block_size = block_size;
q->limits.physical_block_size = block_size;