btrfs: do reverse path readahead in btrfs_shrink_device

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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>

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Gu Jinxiang 2018-04-27 16:22:07 +08:00 • committed by David Sterba

parent 4ed0a7a3b7

commit 0338dff6e0

1 changed files with 1 additions and 1 deletions

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fs/btrfs/volumes.c

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