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SubjectRe: Race between vmtruncate and mapped areas?
Andrea Arcangeli <andrea@suse.de> wrote:
>
> > I do think that we should push the revalidate operation over into the vm_ops.
> > That'll require an extra arg to ->nopage, but it has a spare one anyway (!).
>
> not sure why you need a callback, the lowlevel if needed can serialize
> using the same locking in the address space that vmtruncate uses. I
> would wait a real case need before adding a callback.

Just a vague feeling that knowing about vm_file in do_no_page() is
a layering violation. I guess we can live with it.
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