Regression: QCA6390 fails with "mm/page_alloc: place pages to tail in __free_pages_core()"

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(changing the subject, adding more lists and people)

Pavel Procopiuc <pavel.procopiuc@xxxxxxxxx> writes:

> Op 04.11.2020 om 10:12 schreef Kalle Valo:
>> Yeah, it is unfortunately time consuming but it is the best way to get
>> bottom of this.
>
> I have found the commit that breaks things for me, it's
> 7fef431be9c9ac255838a9578331567b9dba4477 mm/page_alloc: place pages to
> tail in __free_pages_core()
>
> I've reverted it on top of the 5.10-rc2 and ath11k driver loads fine
> and I have wifi working.

Oh, very interesting. Thanks a lot for the bisection, otherwise we would
have never found out whats causing this.

David & mm folks: Pavel noticed that his QCA6390 Wi-Fi 6 device (driver
ath11k) failed on v5.10-rc1. After bisecting he found that the commit
below causes the regression. I have not been able to reproduce this and
for me QCA6390 works fine. I don't know if this needs a specific kernel
configuration or what's the difference between our setups.

Any ideas what might cause this and how to fix it?

Full discussion: http://lists.infradead.org/pipermail/ath11k/2020-November/000501.html

commit 7fef431be9c9ac255838a9578331567b9dba4477
Author:     David Hildenbrand <david@xxxxxxxxxx>
AuthorDate: Thu Oct 15 20:09:35 2020 -0700
Commit:     Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
CommitDate: Fri Oct 16 11:11:18 2020 -0700

    mm/page_alloc: place pages to tail in __free_pages_core()

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