This patch makes dm be aware of io_pages to assign sane req_size for reads.
Cc: [email protected] Cc: Jens Axboe <[email protected]> Cc: Alasdair Kergon <[email protected]> Cc: Mike Snitzer <[email protected]> Cc: [email protected] Fixes: 9491ae4a ("mm: don't cap request size based on read-ahead setting") Signed-off-by: Jaegeuk Kim <[email protected]> --- drivers/md/dm-table.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 9038c302d5c2..886790428241 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1927,6 +1927,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, */ if (blk_queue_is_zoned(q)) blk_revalidate_disk_zones(t->md->disk); + + /* io_pages is used for readahead */ + q->backing_dev_info->io_pages = limits->max_sectors >> (PAGE_SHIFT - 9); } unsigned int dm_table_get_num_targets(struct dm_table *t) -- 2.19.0.605.g01d371f741-goog
