Re: [PATCH v18 1/3] proc: add /proc/<pid>/arch_status

On 2019/5/24 11:18, Andrew Morton wrote:

On Thu, 25 Apr 2019 22:32:17 +0800 Aubrey Li [off-list ref] wrote:

quoted

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@linux-foundation.org>

Thanks!

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 ;)

Andy and Thomas may want to give more comments. The discussion was that
we don't want /proc/PID/status to be different on different architectures.
It would be better to separate the arch staff into its own file /proc/PID/
arch_status and make sure that everything in it is namespaced.

Thanks,
-Aubrey