Re: [PATCH 1/2] MADVISE_FREE, THP: Fix madvise_free_huge_pmd return value after splitting

[Minchan Kim]

On Tue, Jun 28, 2016 at 10:36:29AM -0700, Huang, Ying wrote:
> From: Huang Ying <ying.huang@xxxxxxxxx>
> 
> madvise_free_huge_pmd should return 0 if the fallback PTE operations are
> required.  In madvise_free_huge_pmd, if part pages of THP are discarded,
> the THP will be split and fallback PTE operations should be used if
> splitting succeeds.  But the original code will make fallback PTE
> operations skipped, after splitting succeeds.  Fix that via make
> madvise_free_huge_pmd return 0 after splitting successfully, so that the
> fallback PTE operations will be done.
> 
> Cc: Minchan Kim <minchan@xxxxxxxxxx>
> Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>

Thanks!