strict allocate

[Björn JACKE]

Hi,

bug 6942 beamed by attention to this article:

http://software.intel.com/en-us/articles/windows-client-cifs-behavior-can-slow-linux-nas-performance/

It might be a good idea to change the default of strict allocate to "yes". This
makes out-of-quota situation less error prone and scenarios like in that article
will improve, too.

Has anyone strong feelings against that change of defaults?

In addition to that: When available, we could do allocation with
posix_fallocate(), which has the additional benefit that with recent Linux
kernels and advanced filesystems, allocation is being done at kernel/filesystem
layer via fallocate with quasi zero overhead.

Cheers
Björn
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