Re: [PATCH v13 1/3] /proc/pid/status: Add support for architecture specific output

[Andy Lutomirski]

On Sun, Apr 7, 2019 at 5:38 PM Li, Aubrey <aubrey.li@xxxxxxxxxxxxxxx> wrote:
>
> On 2019/4/8 1:34, Andy Lutomirski wrote:
> > On Fri, Apr 5, 2019 at 12:32 PM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> >>
> >> On Sun, 24 Feb 2019, Aubrey Li wrote:
> >>
> >>> The architecture specific information of the running processes could
> >>> be useful to the userland. Add support to examine process architecture
> >>> specific information externally.
> >>>
> >>> Signed-off-by: Aubrey Li <aubrey.li@xxxxxxxxxxxxxxx>
> >>> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> >>> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> >>> Cc: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
> >>> Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
> >>> Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> >>
> >> This really lacks
> >>
> >> Cc: Linux API <linux-api@xxxxxxxxxxxxxxx>
> >> Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
> >> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> >>
> >> Cc'ed now.
> >>
> >
> > I certainly understand why you want to expose this info, but would it
> > make more sense to instead add an arch_status file in /proc with
> > architecture-specific info?  Or maybe an x86_status field for x86
> > status, etc.
> >
>
> I tried this, but no other architecture showed interest in arch_status
> under /proc.
>

Why is that a problem?  It could exist on x86 and not exist on other
arches until needed.