On Sat 11-06-16 22:21:06, Ebru Akagunduz wrote:

On Fri, May 27, 2016 at 03:12:47PM +0200, Michal Hocko wrote:

[...]

quoted

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

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