bug#9500: [PATCH]: use posix_fallocate where supported

[Pádraig Brady]

On 11/25/2011 10:13 AM, Pádraig Brady wrote:

> Hmm, one of your points above got me thinking.
> Might fallocate() fail to allocate an extent with ENOSPC,
> but there could be fragmented space available to write()?
> That would scupper benefit (2) above :(
> I'll ask address@hidden

And the response from there is that fallocate() will
check the free blocks first, and then try to allocate
as a contiguous extent, but that part is not guaranteed.
So we still get benefit (2).

cheers,
Pádraig.