On 02/16/2011 12:04 PM, Roland McGrath wrote:
IMHO there is not really so much to the in-kernel implementation that it's
worth attempting to reuse the code in userland. Pretty much all the work
is in the details of the implementation that would naturally differ a lot
in a different context. If you understand the mechanism and the machine
details, then implementing it well for a userland context is not a big deal
and is cleaner to do from scratch than shoe-horning kernel-centric code
into a wildly different context.
Good point.
Certainly the details of maintaining instruction cache coherency may be
different in userspace.
David Daney
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