Re: Question About Functions "__free_pages_check" and "check_new_page" in page_alloc.c

From	Vlastimil Babka <vbabka@suse.cz>
Newsgroups	linux.kernel
Subject	Re: Question About Functions "__free_pages_check" and "check_new_page" in page_alloc.c
Date	2016-05-17 07:20 +0200
Message-ID	<rzFAe-iS-1@gated-at.bofh.it> (permalink)
References	<rzstk-df-11@gated-at.bofh.it> <rzstk-df-9@gated-at.bofh.it> <rzFAe-iS-3@gated-at.bofh.it>
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On 05/17/2016 03:06 AM, Wang Xiaoqiang wrote:
>>yes it would. Why that would matter. The checks should be in an order
>>which could give us a more specific reason with later checks. bad_page()
> 
> I see, you mean the later "bad_reason" is the superset of the previous one.

Not exactly. It's not possible to sort all the reasons like that. But as
Michal said, bad_page() will print all the relevant info so you can
reconstruct all reasons from it. The bad_reason text is mostly a hint
what to check first.

>>will then print more detailed information.
>>--
>>Michal Hocko
>>SUSE Labs
> 
> thank you, Michal.
> 
> 
>  
>

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Re: Question About Functions "__free_pages_check" and  "check_new_page" in page_alloc.c Michal Hocko <mhocko@kernel.org> - 2016-05-16 17:20 +0200
  Re: Question About Functions "__free_pages_check" and  "check_new_page" in page_alloc.c Vlastimil Babka <vbabka@suse.cz> - 2016-05-17 07:20 +0200

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