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Chris Mason be20aa9dba Btrfs: Add mount option to turn off data cow 
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>
History 2008-09-25 11:03:58 -04:00
fs/btrfs Btrfs: Add mount option to turn off data cow 2008-09-25 11:03:58 -04:00