RE: [PATCH 1/1] mm/swap.c: flush lru_add pvecs on compound page arrival

[Odzioba, Lukasz]

On Thu 16-06-16 08:19 PM, Michal Hocko wrote:
>
> On Thu 16-06-16 18:08:57, Odzioba, Lukasz wrote:
> I am not able to find clear reasons why we shouldn't do it for the rest.
> Ok so what do we do now? I'll send v2 with proposed changes.
> Then do we still want  to have stats on those pvecs?
> In my opinion it's not worth it now.
>
> I think the fix has a higher priority - we also want to backport it to
> stable trees IMO. We can discuss the stats and how to present them
> later.

Will send the patch tomorrow. In the meantime I was able get similar
problem on lru_deactivate by using MADV_FREE:

LRU_add              588 =    18704kB
LRU_rotate             0 =        0kB
LRU_deactivate       165 =   309304kB
LRU_deact_file         0 =        0kB
LRU_activate           0 =        0kB

Thanks,
Lukas