Request: More flexible MemoryRegion allocation

[GrizzZ13]

Is it possible to allocate a MemoryRegion from a raw pointer or user-managed memory rather than Vec<T> ? Sometimes I would like to allocate memory using mmap to enable huge pages, but it seems like current APIs do not work well for this request.

It would be good if we add methods like this:

impl<'ctx> ProtectionDomain<'ctx> {
    pub unsafe fn allocate_from_raw<T: Sized + Copy + Default>(&self, ptr: *mut u8, n: usize) -> io::Result<MemoryRegion<T>> {
        todo!();
    }
}

Thanks for your time :)

[xmakro]

Yes, this is a good feature request, we will add this. I have the code prepared already and I'm waiting for #50 to be merged before sending the PR for this. I'll cc this issue on the PR when it's ready

[heroin-moose]

Bump?

[heroin-moose]

Also would be nice to be able to specify permissions. allocate_from_raw_with_permissions() would probably be an overkill, a third parameter to this function would be better IMO. Basically ibv_reg_mr does everything right.