Btrfs: make sure all dirty blocks are written at commit time
Write dirty block groups may allocate new block, and so may add new delayed back ref. btrfs_run_delayed_refs may make some block groups dirty. commit_cowonly_roots does not handle the recursion properly, and some dirty blocks can be left unwritten at commit time. This patch moves btrfs_run_delayed_refs into the loop that writes dirty block groups, and makes the code not break out of the loop until there are no dirty block groups or delayed back refs. Signed-off-by: NYan Zheng <zheng.yan@oracle.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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