]> git.baikalelectronics.ru Git - kernel.git/commit
btrfs: do reverse path readahead in btrfs_shrink_device
authorGu Jinxiang <gujx@cn.fujitsu.com>
Fri, 27 Apr 2018 08:22:07 +0000 (16:22 +0800)
committerDavid Sterba <dsterba@suse.com>
Mon, 28 May 2018 16:07:28 +0000 (18:07 +0200)
commit8ab0633d5e8850ebe2722491765d900f415cafff
tree6c25dba30676482bac12647e1cca2060604f199a
parentaff8a72fffb29c8079b555450a16532e3e4de70b
btrfs: do reverse path readahead in btrfs_shrink_device

In btrfs_shrink_device, before btrfs_search_slot, path->reada is set to
READA_FORWARD. But I think READA_BACK is correct.

Since:

 1. key.offset is set to (u64)-1
 2. after btrfs_search_slot, btrfs_previous_item is called

So, for readahead previous items, READA_BACK is the correct one.

Signed-off-by: Gu Jinxiang <gujx@cn.fujitsu.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/volumes.c