Re: [PATCH resend 3/3] mm: fix LRU balancing effect of new transparent huge pages

From: Johannes Weiner
Date: Wed May 27 2020 - 15:42:20 EST

On Wed, May 27, 2020 at 11:29:58AM -0700, Shakeel Butt wrote:
> From: Johannes Weiner <hannes@xxxxxxxxxxx>
> Currently, THP are counted as single pages until they are split right
> before being swapped out. However, at that point the VM is already in
> the middle of reclaim, and adjusting the LRU balance then is useless.
> Always account THP by the number of basepages, and remove the fixup
> from the splitting path.
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>

This is now already in mm as part of the "mm: balance LRU lists based
on relative thrashing" series that I sent out last week and where it
was originally from.