linux-kernel - Re: [PATCH v18 1/3] proc: add /proc/<pid>/arch

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Message-Id: <20190523201822.cc554d68ec567164bec781e1@linux-foundation.org>
Date:   Thu, 23 May 2019 20:18:22 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Aubrey Li <aubrey.li@...ux.intel.com>
Cc:     tglx@...utronix.de, mingo@...hat.com, peterz@...radead.org,
        hpa@...or.com, ak@...ux.intel.com, tim.c.chen@...ux.intel.com,
        dave.hansen@...el.com, arjan@...ux.intel.com, adobriyan@...il.com,
        aubrey.li@...el.com, linux-api@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH v18 1/3] proc: add /proc/<pid>/arch_status

On Thu, 25 Apr 2019 22:32:17 +0800 Aubrey Li <aubrey.li@...ux.intel.com> wrote:

> The architecture specific information of the running processes
> could be useful to the userland. Add /proc/<pid>/arch_status
> interface support to examine process architecture specific
> information externally.

I'll give this an

Acked-by: Andrew Morton <akpm@...ux-foundation.org>

from a procfs POV and shall let the x86 maintainers worry about it.

I must say I'm a bit surprised that we don't already provide some form
of per-process CPU-specific info anywhere in procfs.  Something to
piggy-back this onto.  But I can't find such a thing.

I assume we've already discussed why this is a new procfs file rather
than merely a new line in /proc/<pid>/status.  If so, please add the
reasoning to the changelog.  If not, please discuss now ;)