diff options
| -rw-r--r-- | block/blk-settings.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index f1d4dfdc37a7..0fe16f987cde 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -249,6 +249,13 @@ int blk_validate_limits(struct queue_limits *lim) lim->io_min = lim->physical_block_size; /* + * The optimal I/O size may not be aligned to physical block size + * (because it may be limited by dma engines which have no clue about + * block size of the disks attached to them), so we round it down here. + */ + lim->io_opt = round_down(lim->io_opt, lim->physical_block_size); + + /* * max_hw_sectors has a somewhat weird default for historical reason, * but driver really should set their own instead of relying on this * value. |