[PATCH 21/42] btrfs: reset max_extent_size on clear in a bitmap

[Josef Bacik]

From: Josef Bacik <jba...@fb.com>

We need to clear the max_extent_size when we clear bits from a bitmap
since it could have been from the range that contains the
max_extent_size.

Reviewed-by: Liu Bo <bo....@linux.alibaba.com>
Signed-off-by: Josef Bacik <jba...@fb.com>
---
 fs/btrfs/free-space-cache.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 2dd773e96530..411acffbd45d 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1687,6 +1687,8 @@ static inline void __bitmap_clear_bits(struct 
btrfs_free_space_ctl *ctl,
        bitmap_clear(info->bitmap, start, count);
 
        info->bytes -= bytes;
+       if (info->max_extent_size > ctl->unit)
+               info->max_extent_size = 0;
 }
 
 static void bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,
-- 
2.14.3