linux-kernel - Re: [RFC] mm/page_alloc: Enumerate bad page reasons

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Message-ID: <fb01c215-54e1-9997-8fd4-db9c54ebc469@redhat.com>
Date:   Mon, 30 Mar 2020 14:38:09 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Anshuman Khandual <anshuman.khandual@....com>, linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC] mm/page_alloc: Enumerate bad page reasons

On 30.03.20 14:28, Anshuman Khandual wrote:
> 
> 
> On 03/30/2020 02:15 PM, David Hildenbrand wrote:
>> On 30.03.20 08:51, Anshuman Khandual wrote:
>>> Enumerate all existing bad page reasons which can be used in bad_page() for
>>> reporting via __dump_page(). Unfortunately __dump_page() cannot be changed.
>>> __dump_page() is called from dump_page() that accepts a raw string and is
>>> also an exported symbol that is currently being used from various generic
>>> memory functions and other drivers. This reduces code duplication while
>>> reporting bad pages.
>>
>> Yeah sounds nice, but "56 insertions(+), 20 deletions(-)" does not sound
>> so nice ... and the "code duplication" is actually "repeating strings".
> 
> But repeating strings in very similar functions dealing with bad page state
> is not bit suboptimal ?

Who cares? This is debug output.

-- 
Thanks,

David / dhildenb