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

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On 4/10/2024 3:21 AM, Oscar Salvador wrote:

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) ?

Good point, thanks!

-jane






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