linux-kernel - Re: [PATCH v10 3/3] mm: add anonymous vma name refcounting

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Message-ID: <YV8tlUTdsiVuACx+@dhcp22.suse.cz>
Date:   Thu, 7 Oct 2021 19:25:41 +0200
From:   Michal Hocko <mhocko@...e.com>
To:     Suren Baghdasaryan <surenb@...gle.com>
Cc:     David Hildenbrand <david@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Pavel Machek <pavel@....cz>,
        Andrew Morton <akpm@...ux-foundation.org>,
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Subject: Re: [PATCH v10 3/3] mm: add anonymous vma name refcounting

On Thu 07-10-21 09:43:14, Suren Baghdasaryan wrote:
> On Thu, Oct 7, 2021 at 9:37 AM Michal Hocko <mhocko@...e.com> wrote:
[...]
> > OK, so there is no real authority or any real naming convention. You
> > just hope that applications will behave so that the consumer of those
> > names can make proper calls. Correct?
> >
> > In that case the same applies to numbers and I do not see any strong
> > argument for strings other than it is more pleasing to a human eye when
> > reading the file. And that doesn't sound like a strong argument to make
> > the kernel more complicated. Functionally both approaches are equal from
> > a practical POV.
> 
> I don't think that's correct. Names like [anon:.bss],
> [anon:dalvik-zygote space] and
> [anon:dalvik-/system/framework/boot-core-icu4j.art] provide user with
> actionable information about the use of that memory or the allocator
> using it.

No, none of the above is really actionable without a common
understanding. Both dalvik* are a complete gibberish to me.
-- 
Michal Hocko
SUSE Labs