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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