Re: [PATCH v2 07/11] mm/memory-failure: Convert memory_failure() to use a folio

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On Mon, Apr 08, 2024 at 05:34:29PM -0700, Jane Chu wrote:
> At this stage,  'p' is not expected to be a large page since a _refcount has
> been taken, right?  So is it reasonable to replace the "if (retry)" block
> with a VM_BUG_ON warning?  otherwise, if 'p' became part of a different
> large folio,  how to recover from here ?

We might have split the THP (if it was part of), but AFAICS
nothing stops the kernel to coallesce this page again into a new THP via e.g:
madvise(MADV_HUGEPAGE) ?


-- 
Oscar Salvador
SUSE Labs




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