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Btrfs: update nodatacow code v2

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This patch simplifies the nodatacow checker. If all references
were created after the latest snapshot, then we can avoid COW
safely. This patch also updates run_delalloc_nocow to do more
fine-grained checking.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
This commit is contained in:
Yan Zheng 2008-10-30 14:20:02 -04:00 • committed by Chris Mason
commit 80ff385665
7 changed files with 154 additions and 213 deletions
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