Re: [PATCH v4 01/13] mm: Assign id to every memcg-aware shrinker

[Shakeel Butt <shakeelb@google.com>]

On Wed, May 9, 2018 at 3:55 PM Andrew Morton <akpm@linux-foundation.org>
wrote:

> On Wed, 09 May 2018 14:56:55 +0300 Kirill Tkhai <ktkhai@virtuozzo.com>
wrote:

> > The patch introduces shrinker::id number, which is used to enumerate
> > memcg-aware shrinkers. The number start from 0, and the code tries
> > to maintain it as small as possible.
> >
> > This will be used as to represent a memcg-aware shrinkers in memcg
> > shrinkers map.
> >
> > ...
> >
> > --- a/fs/super.c
> > +++ b/fs/super.c
> > @@ -248,6 +248,9 @@ static struct super_block *alloc_super(struct
file_system_type *type, int flags,
> >       s->s_time_gran = 1000000000;
> >       s->cleancache_poolid = CLEANCACHE_NO_POOL;
> >
> > +#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)

> It would be more conventional to do this logic in Kconfig - define a
> new MEMCG_SHRINKER which equals MEMCG && !SLOB.

> This ifdef occurs a distressing number of times in the patchset :( I
> wonder if there's something we can do about that.

> Also, why doesn't it work with slob?  Please describe the issue in the
> changelogs somewhere.

> It's a pretty big patchset.  I *could* merge it up in the hope that
> someone is planning do do a review soon.  But is there such a person?


Hi Andrew, couple of these patches are being reviewed by Vladimir and I
plan to review too by next week. I think we can merge them into mm tree for
more testing and I will also this patch series internally (though I have to
backport them to our kernel for more extensive testing).

thanks,
Shakeel