Re: [PATCH 2/2] mm/hwpoison-inject: check PageLRU of hpage

[Dean Nelson]

On 04/16/2015 09:08 PM, Naoya Horiguchi wrote:
> Hwpoison injector checks PageLRU of the raw target page to find out whether
> the page is an appropriate target, but current code now filters out thp tail
> pages, which prevents us from testing for such cases via this interface.
> So let's check hpage instead of p.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>

Acked-by: Dean Nelson <dnelson@xxxxxxxxxx>


> ---
>   mm/hwpoison-inject.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git v4.0.orig/mm/hwpoison-inject.c v4.0/mm/hwpoison-inject.c
> index 2b3f933e3282..4ca5fe0042e1 100644
> --- v4.0.orig/mm/hwpoison-inject.c
> +++ v4.0/mm/hwpoison-inject.c
> @@ -34,12 +34,12 @@ static int hwpoison_inject(void *data, u64 val)
>   	if (!hwpoison_filter_enable)
>   		goto inject;
>   
> -	if (!PageLRU(p) && !PageHuge(p))
> -		shake_page(p, 0);
> +	if (!PageLRU(hpage) && !PageHuge(p))
> +		shake_page(hpage, 0);
>   	/*
>   	 * This implies unable to support non-LRU pages.
>   	 */
> -	if (!PageLRU(p) && !PageHuge(p))
> +	if (!PageLRU(hpage) && !PageHuge(p))
>   		goto put_out;
>   
>   	/*
> 

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