Messages in this thread | | | Date | Thu, 2 Mar 2023 08:57:13 -0500 | From | Peter Xu <> | Subject | Re: [PATCH v2] mm/uffd: UFFD_FEATURE_WP_UNPOPULATED |
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On Thu, Mar 02, 2023 at 10:37:44AM +0100, David Hildenbrand wrote: > Especially for such large sparse VMAs, the current way of allocating > pagetables to place markers/zeropages is far from optimal.
IMHO that's not a generic workload. As mentioned in the reply there, I would suggest we go with simple then we have space to optimize it in the future if necessary, because the API will be the same.
If I want to monitor a super sparse VMA on dirty, one thing I can already try is register with MISSING + WP (!WP_UNPOPULATED). It may be a good intermediate solution to avoid any marker ovearheads.
-- Peter Xu
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