github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-07 14:04:54 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

UPSTREAM: dm: do not allow readahead to limit IO size

Browse Source 
Update DM to set the bdi's io_pages.  This fixes reads to be capped at
the device's max request size (even if user's read IO exceeds the
established readahead setting).

Fixes: 9491ae4a ("mm: don't cap request size based on read-ahead setting")
Cc: stable@vger.kernel.org
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
(cherry picked from commit c6d6e9b0f6)
Bug: 120757803
Link: https://patchwork.kernel.org/patch/10746255/
Change-Id: I876f4c5425253c2a0876d5ef7fefe36c4edcb46c
This commit is contained in:
Jaegeuk Kim 2018-12-18 05:43:41 -08:00 committed by Alistair Strachan
parent c29a889a73
commit 403c37ff75
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/md/dm-table.c
View File

@ -1937,6 +1937,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
*/
if (blk_queue_add_random(q) && dm_table_all_devices_attribute(t, device_is_not_random))
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
/* 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)