| Date | Fri, 24 Nov 2023 20:35:47 +0100 | Subject | Re: [PATCH RFC v2 05/27] mm: page_alloc: Add an arch hook to allow prep_new_page() to fail | From | David Hildenbrand <> |
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On 19.11.23 17:56, Alexandru Elisei wrote: > Introduce arch_prep_new_page(), which will be used by arm64 to reserve tag > storage for an allocated page. Reserving tag storage can fail, for example, > if the tag storage page has a short pin on it, so allow prep_new_page() -> > arch_prep_new_page() to similarly fail.
But what are the side-effects of this? How does the calling code recover?
E.g., what if we need to populate a page into user space, but that particular page we allocated fails to be prepared? So we inject a signal into that poor process?
-- Cheers,
David / dhildenb
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