Jan Kara c86d8db33a ext4: implement allocation of pre-zeroed blocks ...

DAX page fault path needs to get blocks that are pre-zeroed to avoid
races when two concurrent page faults happen in the same block of a
file. Implement support for this in ext4_map_blocks().

Signed-off-by: Jan Kara <jack@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

2015-12-07 15:10:26 -05:00

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