linux-kernel - Re: Regression: QCA6390 fails with "mm/page_alloc: place pages to tail in __free_pages

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Message-Id: <C3FD015A-8E51-4752-AD76-6ABE4583E268@redhat.com>
Date:   Thu, 5 Nov 2020 21:23:12 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Pavel Procopiuc <pavel.procopiuc@...il.com>
Cc:     David Hildenbrand <david@...hat.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Kalle Valo <kvalo@...eaurora.org>, ath11k@...ts.infradead.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: Regression: QCA6390 fails with "mm/page_alloc: place pages to tail in __free_pages_core()"


> Am 05.11.2020 um 13:55 schrieb Pavel Procopiuc <pavel.procopiuc@...il.com>:
> 
> Op 05.11.2020 om 12:13 schreef David Hildenbrand:
>> It depends in which order memory is exposed to MM, which might depend on other factors in some configurations.
>> This smells like it exposes an existing bug. Can you reproduce also with zone shuffling enabled?
> 
> So just to make sure I understand you correctly, you'd like to see if the problem with ath11k driver on my hardware persists when I boot pristine 5.10-rc2 kernel (without reverting commit 7fef431be9c9ac255838a9578331567b9dba4477) and with page_alloc.shuffle=1, right?
> 

Right, but as lists are randomized then it might take a couple of tries to reproduce. I‘ll have a look at the driver code / failing path on Monday, when back to work.

Cheers!