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2008 Jul 18
1
[RFC][PATCH] Fix nodatacow check
Hello,
This patch fixes the nodatacow check. The new test function can always
detect extents referenced by multiple snatshots. If a extent was
allocated in recent two transactions and no snapshot happened in these
two transactions, we can always avoid cow. To check given extent''s
reference, the test function walks down old tree root, then check
backref info in the path. This initial version takes old tree root
f...