tree 53a3aa709232b00473c8da70b792b350150956ff
parent 7d39db14a42cbd719c7515b9da8f85a2eb6a0633
author Theodore Ts'o <tytso@mit.edu> 1237259543 -0400
committer Theodore Ts'o <tytso@mit.edu> 1237259543 -0400

ext4: Add auto_da_alloc mount option

Add a mount option which allows the user to disable automatic
allocation of blocks whose allocation by delayed allocation when the
file was originally truncated or when the file is renamed over an
existing file.  This feature is intended to save users from the
effects of naive application writers, but it reduces the effectiveness
of the delayed allocation code.  This mount option disables this
safety feature, which may be desirable for prodcutions systems where
the risk of unclean shutdowns or unexpected system crashes is low.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>