On Mon, Jun 14, 2021 at 05:13:51PM -0700, Andrew Morton wrote:

On Mon, 14 Jun 2021 11:25:54 +0300 Mike Rapoport [off-list ref] wrote:

quoted

On Tue, Jun 08, 2021 at 12:36:21PM +0530, Anshuman Khandual wrote:

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On 5/28/21 10:43 AM, Mike Rapoport wrote:

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On Thu, May 27, 2021 at 03:56:44PM -0700, Andrew Morton wrote:

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On Thu, 27 May 2021 18:50:48 +0100 Catalin Marinas [off-list ref] wrote:

quoted

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Can you please try Anshuman's patch "arm64/mm: Drop HAVE_ARCH_PFN_VALID":

https://lore.kernel.org/lkml/1621947349-25421-1-git-send-email-anshuman.khandual@arm.com (local)

It seems to me that the check for memblock_is_memory() in
arm64::pfn_valid() is what makes init_unavailable_range() to bail out for
section parts that are not actually populated and then we have
VM_BUG_ON_PAGE(PagePoisoned(p)) for these pages.

I acked Anshuman's patch, I think they all need to go in together.

That's neat.   Specifically which patches are we referring to here?

arm64: drop pfn_valid_within() and simplify pfn_valid():
https://lore.kernel.org/lkml/20210511100550.28178-5-rppt@kernel.org (local)

arm64/mm: Drop HAVE_ARCH_PFN_VALID:
https://lore.kernel.org/lkml/1621947349-25421-1-git-send-email-anshuman.khandual@arm.com (local)

I dont see the above patch (which drops HAVE_ARCH_PFN_VALID on arm64) on linux-next
i.e. next-20210607. I might have missed some earlier context here but do not we want
to fallback on generic pfn_valid() after Mike's series ?

Andrew,

Can you please pick the two patches above?

I already had

include-linux-mmzoneh-add-documentation-for-pfn_valid.patch
memblock-update-initialization-of-reserved-pages.patch
arm64-decouple-check-whether-pfn-is-in-linear-map-from-pfn_valid.patch
arm64-drop-pfn_valid_within-and-simplify-pfn_valid.patch

and I just added

arm64-mm-drop-have_arch_pfn_valid.patch

so I think we're all good now?

Yes. 
 

and I don't think any of this is needed in 5.13 or -stable, correct?

Right.
 

I still have question marks over

https://lkml.kernel.org/r/YJ0Fhs5krPJ0FgiV@kernel.org and
https://lkml.kernel.org/r/d55f915c-ad01-e729-1e29-b57d78257cbb@quicinc.com

Is this all OK now?

Yes, it is.

-- 
Sincerely yours,
Mike.

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