Btrfs: fix memory leak of empty filesystem after balance
After Josef's patch(commit 3c14874a ), btrfs will exclude super bytes when reading block groups(by marking a extent state UPTODATE). However, these bytes do not get freed while balance remove unused block groups, and we won't process those removed ones any more, when we do umount and unload the btrfs module, btrfs hits a memory leak. This patch add the missing free operation. Reproduce steps: $ mkfs.btrfs disk $ mount disk /mnt/btrfs -o loop $ btrfs filesystem balance /mnt/btrfs $ umount /mnt/btrfs $ rmmod btrfs Signed-off-by:Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by:
Chris Mason <chris.mason@oracle.com>
parent
2d4e6f6a
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