Re: [PATCH 2/4] mm/mempolicy: correct putback method for isolate pages if failed

[Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>]

Hi Joonsoo,

On Fri, Dec 06, 2013 at 05:41:48PM +0900, Joonsoo Kim wrote:
> queue_pages_range() isolates hugetlbfs pages and putback_lru_pages() can't
> handle these. We should change it to putback_movable_pages().
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>

Nice fix, thanks.
I think that this patch is worth going into -stable 3.12,
because it can break in-use hugepage list.

Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

> diff --git a/mm/mempolicy.c b/mm/mempolicy.c
> index eca4a31..6d04d37 100644
> --- a/mm/mempolicy.c
> +++ b/mm/mempolicy.c
> @@ -1318,7 +1318,7 @@ static long do_mbind(unsigned long start, unsigned long len,
>  		if (nr_failed && (flags & MPOL_MF_STRICT))
>  			err = -EIO;
>  	} else
> -		putback_lru_pages(&pagelist);
> +		putback_movable_pages(&pagelist);
>  
>  	up_write(&mm->mmap_sem);
>   mpol_out:
> -- 
> 1.7.9.5
> 
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