>>>>> "Nick" == Nick Piggin <nickpiggin@xxxxxxxxxxxx> writes: Nick> Jes Sorensen wrote: >> + vma->vm_flags |= (VM_IO | VM_LOCKED | VM_RESERVED | VM_PFNMAP); Nick> VM_PFNMAP actually has a fairly specific meaning [unlike the Nick> rest of them :)] so you should be careful with it. Actually if Nick> you set vm_pgoff in the right way, then that should enable you Nick> to do COWs on these areas if that is what you want. Yup, I went through that when I started using it. I think you guided me through it :-) We don't want COW here as the access is backed by special behavior in the memory controller. We only allow shared mappings for that reason. Cheers, Jes - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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