Linus Torvalds wrote:
> At the very least, it would also need a
> (or at least make it return VM_FAULT_SIGBUS). Because a COW mapping _will_
> confuse the VM and cause it to do random bad things in vm_normal_page().
That leaves my use-case out for now. I will need COW for my mapping when
switching to this interface. Looks like a lot of things need rethinking
in memory.c for COW with no struct page behind.
IBM Linux technology center
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