Re: TAKE 972756 - Implement fallocate.

[David Chinner <dgc@xxxxxxx>]

On Tue, Nov 06, 2007 at 12:12:52AM +0530, Bhagi rathi wrote:
> David, What happens if offset is not aligned to 4k? Let's say we have a file
> whose size is
> not aligned to 4k. It could have blocks beyond the eof which haven't been
> zero'ed out.

No it won't. They are *preallocated* blocks, which by definition are
zero-filled. Preallocated blocks are marked as unwritten on disk, so
it is known that they contain zeros, even if they lie beyond EOF.

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group