On Wed, 20 Jun 2007, Paul Mundt wrote:
> There's quite a bit of room for improving and extending the existing
> code, and those options should likely be exhausted first.
There is a confusing maze of special rules if one goes beyond the simple
process address space case. There are no clean rules on how to combine
memory policies. Refcounting / updating becomes a problem because policies
are intended to be only updated from the process that set them up. Look at
the gimmicks that Paul needed to do to update memory policies when a
process is migrated and the vmas on the stack for shmem etc etc.
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