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Chris Mason 9f3a742736 Btrfs: Do snapshot deletion in smaller chunks. 
Before, snapshot deletion was a single atomic unit.  This caused considerable
lock contention and required an unbounded amount of space.  Now,
the drop_progress field in the root item is used to indicate how far along
snapshot deletion is, and to resume where it left off.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
History 2007-08-07 15:52:19 -04:00
fs/btrfs Btrfs: Do snapshot deletion in smaller chunks. 2007-08-07 15:52:19 -04:00