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Commit 7ec31b54 authored by Liu Bo's avatar Liu Bo Committed by Chris Mason
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Btrfs: do not defrag a file partially 



xfstests 218 complains that btrfs defrags a file partially:
 After: 1
 Write backwards sync, but contiguous - should defrag to 1 extent
 Before: 10
-After: 1
+After: 2

To fix this, we need to set max_to_defrag count properly.

Signed-off-by: default avatarLiu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 0b485143

fs/btrfs/ioctl.c

+1 −1
Original line number Diff line number Diff line
@@ -1066,7 +1066,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file, 
		i = range->start >> PAGE_CACHE_SHIFT;

	}

	if (!max_to_defrag)

		max_to_defrag = last_index;

		max_to_defrag = last_index + 1;



	/*

	 * make writeback starts from i, so the defrag range can be