linux-kernel - Re: [PATCH 7/7] microblaze: Do atomic operations by using exclusive ops

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Message-ID: <20200213113432.GF69108@debian-boqun.qqnc3lrjykvubdpftowmye0fmh.lx.internal.cloudapp.net>
Date:   Thu, 13 Feb 2020 19:34:32 +0800
From:   Boqun Feng <boqun.feng@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Michal Simek <michal.simek@...inx.com>,
        linux-kernel@...r.kernel.org, monstr@...str.eu, git@...inx.com,
        arnd@...db.de,
        Stefan Asserhall load and store 
        <stefan.asserhall@...inx.com>, Will Deacon <will@...nel.org>,
        paulmck@...nel.org
Subject: Re: [PATCH 7/7] microblaze: Do atomic operations by using exclusive
 ops

On Thu, Feb 13, 2020 at 09:58:49AM +0100, Peter Zijlstra wrote:
[...]
> 
> > Also is there any testsuite I should run to verify all these atomics
> > operations? That would really help but I haven't seen any tool (but also
> > didn't try hard to find it out).
> 
> Will, Paul; can't this LKMM thing generate kernel modules to run? And do

The herd toolset does have something called klitmus:

"an experimental tool, similar to litmus7 that runs kernel memory model
tests as kernel modules."

I think Andrea knows more about how to use it.

> we have a 'nice' collection of litmus tests that cover atomic_t ?
> 

There is a few in Paul's litmus repo:

	https://github.com/paulmckrcu/litmus/tree/master/manual/atomic

Maybe a good start?

Regards,
Boqun

> The one in atomic_t.txt should cover this one at least.