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SubjectRe: x86 question: Can a process have > 3GB memory?
>> Hey Cliff, we are planning to implement virtwin() if you remember that
>> from PTX. AWE on NT was derived from the same work. There should soon
>> be some discussion about it on lse-tech@lists.sourceforge.net or I can
>> give you some more data...
>
> Please implement it in userspace, using large POSIX shared memory
> segments and mmaping / munmapping them as needed.
>
> This seems like a special enough case to keep it out of the kernel
> entirely. If there's something not efficient enough we could work
> on optimising the whole mmap & munmap path...

How are you going to change the user page tables from userspace?
This mechanism would seem to need kernel support however you did it.

M.

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