On Thu, 2019-02-21 at 17:46 -0500, Roman Gushchin wrote:

On Wed, Feb 20, 2019 at 06:27:07PM +1100, Dave Chinner wrote:

quoted

On Wed, Feb 20, 2019 at 04:50:31PM +1100, Dave Chinner wrote:

quoted

I'm just going to fix the original regression in the shrinker
algorithm by restoring the gradual accumulation behaviour, and
this
whole series of problems can be put to bed.

Something like this lightly smoke tested patch below. It may be
slightly more agressive than the original code for really small
freeable values (i.e. < 100) but otherwise should be roughly
equivalent to historic accumulation behaviour.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

mm: fix shrinker scan accumulation regression

From: Dave Chinner <redacted>

JFYI: I'm testing this patch in our environment for fixing
the memcg memory leak.

It will take a couple of days to get reliable results.

Just to clarify, is this test with fls instead of ilog2,
so the last item in a slab cache can get reclaimed as
well?

-- 
All Rights Reversed.