Ciaran McCreesh wrote:
> On Wed, 4 Nov 2009 16:07:30 +0100
> Ulrich Mueller <ulm@g.o> wrote:
>> Obviously we cannot guarantee anything below the seconds level because
>> of limitations in the underlying filesystems or software (e.g., tar
>> for binpkgs). But is there a reason for limiting it further, i.e. not
>> preserving sub-second timestamps if they are supported by both
>> filesystems?
> 
> So far as I can see, if they're fully supported on both filesystems,
> Portage sometimes preserves nanosecond-resolution timestamps and
> sometimes doesn't. So, requiring nanosecond-resolution timestamp
> preservation where possible will need Portage changes.

I think it always preserves them, as long as you have at least
python-2.5 since that is required for floating-point mtime support.
-- 
Thanks,
Zac