Re: [RFC] Heads up on sys_fallocate()

[Ulrich Drepper]

JÃrn Engel wrote:
> The bad news for posix_fallocate() is that even if libc is smart enough
> to write random data, mmap() can still cause problems.

This is not smart, quite to the contrary.  The standard guarantees that
all not-yet-written-to places in the file are zero.  And if a block has
already been written posix_fallocate cannot change it.

-- 
â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â

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