linux-kernel - Re: [PATCH] mm, page_alloc: really disable DEBUG

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Message-ID: <42f47d7e-4bf8-22a8-c8b8-8fa5221f2cd0@canonical.com>
Date:   Wed, 19 May 2021 11:43:34 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Vlastimil Babka <vbabka@...e.cz>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Akinobu Mita <akinobu.mita@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     David Hildenbrand <david@...hat.com>,
        Michal Hocko <mhocko@...nel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Andrea Righi <andrea.righi@...onical.com>,
        Guilherme Piccoli <gpiccoli@...onical.com>
Subject: Re: [PATCH] mm, page_alloc: really disable DEBUG_PAGEALLOC with
 hibernation

On 19/05/2021 11:38, Vlastimil Babka wrote:
> On 5/19/21 5:28 PM, Krzysztof Kozlowski wrote:
>> The documentation of DEBUG_PAGEALLOC states that it cannot be used with
>> hibernation, however the Kconfig entry would allow it if
>> ARCH_SUPPORTS_DEBUG_PAGEALLOC && !PPC && !SPARC.
>>
>> Fixes: ee3b4290aec0 ("generic debug pagealloc: build fix")
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> 
> Hmm the documentation seems wrong, as going through history it was indeed in
> conflict only on PPC and SPARC.

Indeed, x86 was never marked as a problem, although text/info warning
does not mention specific architectures.
> 


Best regards,
Krzysztof