linux-kernel - Re: [PATCH] docs: submit-checklist: structure by category

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Message-ID: <CAKXUXMz66AzotSqzVHvXivdwhh0d34_GWqLu-hBgEq46AOOFSg@mail.gmail.com>
Date: Tue, 27 Feb 2024 12:03:51 +0100
From: Lukas Bulwahn <lukas.bulwahn@...il.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Randy Dunlap <rdunlap@...radead.org>, Jonathan Corbet <corbet@....net>, workflows@...r.kernel.org, 
	linux-doc@...r.kernel.org, kernel-janitors@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] docs: submit-checklist: structure by category

On Tue, Feb 27, 2024 at 9:57 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Randy,
>
> On Tue, Feb 27, 2024 at 1:41 AM Randy Dunlap <rdunlap@...radead.org> wrote:
> > >   - Concerning checking with tools, checkpatch probably still makes sense;
> > >     it pointed out in several places. If sparse and checkstack are really
> > >     the next two tools to point out, I am not so sure about.
> >
> > I doubt that ckeckstack is important since gcc & clang warn us about
> > stack usage.
>
> True, but that would leave you without a tool to get figures when
> there is no excess stack usage detected by the compiler.
>

Geert,

possibly, we can configure the compiler to report/warn on any stack
usage from every invocation and then turn all those warnings into a
readable format or some format that further visualization and analysis
tools can process.

If that works, we can remove the checkstack tool. It is not a
massively large script, but it is certainly written with a very
special purpose. I mean it basically does object-code
reverse-engineering with a magic set of regular expressions in Perl.
If our current compilers can emit the same information, we are
probably better off just using the output from a compiler and
postprocessing that.

Anyways, I think it is worth investigating all that and then see if
the checkstack.pl tool still has a unique functionality, or if there
are other better ways to get this kind of information---well, it is
marked as todo, so anyone is free to pick it up.

Lukas

Lukas