Re: [patch 3/3] mm: fault handler to replace nopage and populate

[Thomas Hellstrom]

Benjamin Herrenschmidt wrote:
> > Still, even with NOPAGE_REFAULT or the equivalent with the new fault() code,
> > in the case we need to take this route, (and it looks like we won't have 
> > to),
> > I guess we still need to restart from find_vma() in the fault()/nopage() 
> > handler to make sure the VMA is still present. The object mutex need to 
> > be dropped as well to avoid deadlocks. Sounds complicated.
>
>
> But as we said, it should be enough to do the flag change with the
> object mutex held as long as it's after unmap_mapped_ranges()
>
> Ben.
Agreed.
/Thomas



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