linux-kernel - Re: [PATCH rfc 0/5] mm: introduce shrinker sysfs interface

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Date:   Tue, 19 Apr 2022 20:33:22 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Roman Gushchin <roman.gushchin@...ux.dev>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        Dave Chinner <dchinner@...hat.com>,
        linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Yang Shi <shy828301@...il.com>
Subject: Re: [PATCH rfc 0/5] mm: introduce shrinker sysfs interface

On Tue, Apr 19, 2022 at 10:52:44AM -0700, Roman Gushchin wrote:
> On Mon, Apr 18, 2022 at 09:27:09PM -0700, Andrew Morton wrote:
> > > The folder
> > > contains "count" and "scan" files, which allow to trigger count_objects()
> > > and scan_objects() callbacks. For memcg-aware and numa-aware shrinkers
> > > count_memcg, scan_memcg, count_node, scan_node, count_memcg_node
> > > and scan_memcg_node are additionally provided. They allow to get per-memcg
> > > and/or per-node object count and shrink only a specific memcg/node.
> > > 
> > > To make debugging more pleasant, the patchset also names all shrinkers,
> > > so that sysfs entries can have more meaningful names.
> > 
> > I also was wondering "why not debugfs".
> 
> Fair enough, moving to debugfs in v1.

Thank you, that keeps me from complaining about how badly you were
abusing sysfs in this patchset :)