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List: linux-bcache
Subject: [PATCH 2/9] bcache: discard_granularity should not be smaller than a sector
From: Christoph Hellwig <hch () lst ! de>
Date: 2023-12-28 7:55:38
Message-ID: 20231228075545.362768-3-hch () lst ! de
[Download RAW message or body]
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>
---
drivers/md/bcache/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index bfe1685dbae574..ecc1447f202a42 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -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;
--
2.39.2
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