Re: [PATCH 0/3] mm, thp: remove duplication and fix locking issues in swapin

[Michal Hocko]

On Sat 11-06-16 22:21:06, Ebru Akagunduz wrote:
> On Fri, May 27, 2016 at 03:12:47PM +0200, Michal Hocko wrote:
[...]
> > IMHO we should drop the current ALLOCSTALL heuristic and replace it with
> > ~__GFP_DIRECT_RECLAIM.
>
> Actually, I don't lean towards to touch do_swap_page giving gfp parameter.
> do_swap_page is also used by do_page_fault, it can cause many side effect
> that I can't see. 

The point of the patch is to keep the current gfp mask from all places
except for the optimistic swapin. This was what my example patch did
AFAIR.
 
> I've just sent a patch series for converting from optimistic to
> conservative and take back allocstall. Maybe that way can be easier to
> be approved and less problemitical.

I will try to have a look but I will be travelling this week so cannot
promise anything.
-- 
Michal Hocko
SUSE Labs