Re: [PATCH resend 3/3] mm: fix LRU balancing effect of new transparent huge pages
From: Shakeel Butt
Date: Wed May 27 2020 - 15:46:28 EST
On Wed, May 27, 2020 at 12:42 PM Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
> 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.
Oh sorry, I missed it.