linux-kernel - Re: [PATCH v7 0/4] page_owner: print stacks and their outstanding allocations

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Message-ID: <ZcaZsH0kuZCDPEtX@localhost.localdomain>
Date: Fri, 9 Feb 2024 22:31:28 +0100
From: Oscar Salvador <osalvador@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Michal Hocko <mhocko@...e.com>, Vlastimil Babka <vbabka@...e.cz>,
	Marco Elver <elver@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Alexander Potapenko <glider@...gle.com>
Subject: Re: [PATCH v7 0/4] page_owner: print stacks and their outstanding
 allocations

On Thu, Feb 08, 2024 at 04:28:18PM -0800, Andrew Morton wrote:
> Oh, there it is.  I wonder why we didn't use /sys/kernel/mm/

I just followed the convention we use at the moment, which happens
to be /sys/kernel/debug/page_owner_xxx.

> Would a new /sys/kernel/debug/page_owner_something/ be a good idea?  We
> might add more things later.  Then it can be
> /sys/kernel/debug/page_owner_something/full_stacks. 
> /sys/kernel/debug/page_owner/ would be nice, but it's too late for
> that.

Well, we could certainly do that, so we do not scatter the files
in /sys/kernel/debug/ but rather gather them in pagE_owner directory.
Let me see if I can come up with a proper name.

> > Oscar Salvador (4):
> >   lib/stackdepot: Move stack_record struct definition into the header
> >   mm,page_owner: Implement the tracking of the stacks count
> >   mm,page_owner: Display all stacks and their count
> >   mm,page_owner: Filter out stacks by a threshold
> > 
> >  include/linux/stackdepot.h |  72 ++++++++++++++++++++
> >  lib/stackdepot.c           |  97 ++++++++++++++------------
> >  mm/page_owner.c            | 136 +++++++++++++++++++++++++++++++++++++
> >  3 files changed, 262 insertions(+), 43 deletions(-)
> 
> Documentation/mm/page_owner.rst?

Heh, we are definitely going to need some documentation.
Let me prepare something.

Thanks Andrew


-- 
Oscar Salvador
SUSE Labs