Re: [RFC 04/11] mm: remove SWAP_MLOCK check for SWAP_SUCCESS in ttu

Minchan Kim
2017-03-03T03:04:19Z

On Thu, Mar 02, 2017 at 08:21:46PM +0530, Anshuman Khandual wrote:
> On 03/02/2017 12:09 PM, Minchan Kim wrote:
> > If the page is mapped and rescue in ttuo, page_mapcount(page) == 0 cannot
>
> Nit: "ttuo" is very cryptic. Please expand it.

No problem.

>
> > be true so page_mapcount check in ttu is enough to return SWAP_SUCCESS.
> > IOW, SWAP_MLOCK check is redundant so remove it.
>
> Right, page_mapcount(page) should be enough to tell whether swapping
> out happened successfully or the page is still mapped in some page
> table.
>

Thanks for the review, Anshuman!