Re: NUMA API for Linux

[Hugh Dickins]

On Thu, 8 Apr 2004, Rajesh Venkatasubramanian wrote:
> 
> I guess using vm_private_data for nonlinear is not a problem because
> we use list i_mmap_nonlinear for nonlinear vmas.
> 
> As you have found out vm_private_data is only used if vm_file != NULL
> or VM_RESERVED or VM_DONTEXPAND is set. I think we can revert back to
> i_mmap{_shared} list for such special cases and use prio_tree for
> others. I maybe missing something. Please teach me.

Sorry, I don't understand what you're proposing here, and why?
Oh, to save 4 bytes of vma by making the special cases use a list,
no need for vm_set_head, and vm_private_data for the driver itself;
but regular vmas use prio_tree, with vm_set_head in vm_private_data.
Hmm, right now it's getting too much for me: can we keep it simplish
for now, and come back to this later?

Hugh

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