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Btrfs: Add mount option to turn off data cow

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A number of workloads do not require copy on write data or checksumming.
mount -o nodatasum to disable checksums and -o nodatacow to disable
both copy on write and checksumming.

In nodatacow mode, copy on write is still performed when a given extent
is under snapshot.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-12-17 20:14:01 -05:00
commit be20aa9dba
5 changed files with 293 additions and 25 deletions
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