linux-kernel - Re: [PATCH V2] mm: add show num_poisoned

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Date:	Tue, 10 Dec 2013 14:56:28 -0500
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	qiuxishi@...wei.com, akpm@...ux-foundation.org, mhocko@...e.cz,
	mgorman@...e.de, rientjes@...gle.com, n-horiguchi@...jp.nec.com
CC:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH V2] mm: add show num_poisoned_pages when oom

(12/9/2013 8:38 PM), Xishi Qiu wrote:
> Show num_poisoned_pages when oom, it is a little helpful to find the reason.
> Also it will be emitted anytime show_mem() is called.
> 
> Signed-off-by: Xishi Qiu <qiuxishi@...wei.com>
> Suggested-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Acked-by: Michal Hocko <mhocko@...e.cz>
> Acked-by: David Rientjes <rientjes@...gle.com>
> ---
>  lib/show_mem.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/lib/show_mem.c b/lib/show_mem.c
> index 5847a49..1cbdcd8 100644
> --- a/lib/show_mem.c
> +++ b/lib/show_mem.c
> @@ -46,4 +46,7 @@ void show_mem(unsigned int filter)
>  	printk("%lu pages in pagetable cache\n",
>  		quicklist_total_size());
>  #endif
> +#ifdef CONFIG_MEMORY_FAILURE
> +	printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
> +#endif
>  }

Looks ok.

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

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