When 0xffffffff >> 9 are splited by 0xffff * 64, there will be a
remainder of 127. Avoid these small fragments by aligning the split
to 128.
Signed-off-by: Tom Yan <tom.ty89@xxxxxxxxx>
---
block/blk.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/block/blk.h b/block/blk.h
index dfab98465db9..1dc12fc86de8 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -281,8 +281,11 @@ static inline unsigned int bio_allowed_max_sectors(struct request_queue *q)
static inline unsigned int bio_aligned_discard_max_sectors(
struct request_queue *q)
{
- return round_down(UINT_MAX, q->limits.discard_granularity) >>
- SECTOR_SHIFT;
+ unsigned int granularity = q->limits.discard_granularity;
+ /* Avoid fragmented splits for ATA drives */
+ if (128 % granularity == 0)
+ granularity = 128;
+ return round_down(UINT_MAX, granularity) >> SECTOR_SHIFT;
}
/*
--
2.29.2
