linux-kernel - Re: [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests

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Message-ID: <87a80qjbyn.fsf@concordia.ellerman.id.au>
Date:   Tue, 17 Oct 2017 21:38:40 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Paul Turner <pjt@...gle.com>, Andrew Hunter <ahh@...gle.com>,
        Andy Lutomirski <luto@...capital.net>,
        Dave Watson <davejwatson@...com>,
        Josh Triplett <josh@...htriplett.org>,
        Will Deacon <will.deacon@....com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Russell King <linux@....linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andi Kleen <andi@...stfloor.org>, Chris Lameter <cl@...ux.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ben Maurer <bmaurer@...com>,
        rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        shuah <shuah@...nel.org>,
        linux-kselftest <linux-kselftest@...r.kernel.org>,
        linux-api <linux-api@...r.kernel.org>
Subject: Re: [RFC PATCH for 4.15 14/14] Restartable sequences: Provide self-tests

Mathieu Desnoyers <mathieu.desnoyers@...icios.com> writes:

> ----- On Oct 15, 2017, at 10:51 PM, Michael Ellerman mpe@...erman.id.au wrote:
>
>> Mathieu Desnoyers <mathieu.desnoyers@...icios.com> writes:
>> 
>>> Implements two basic tests of RSEQ functionality, and one more
>>> exhaustive parameterizable test.
>>>
>>> The first, "basic_test" only asserts that RSEQ works moderately
>>> correctly.
>>> E.g. that:
>>> - The CPUID pointer works
>>> - Code infinitely looping within a critical section will eventually be
>>>   interrupted.
>>> - Critical sections are interrupted by signals.
>>>
>>> "basic_percpu_ops_test" is a slightly more "realistic" variant,
>>> implementing a few simple per-cpu operations and testing their
>>> correctness.
>>>
>>> "param_test" is a parametrizable restartable sequences test. See
>>> the "--help" output for usage.
>> 
>> Thanks for providing selftests :)
>> 
>> The Makefiles could use a little clean up:
>>  - cpu-opv doesn't need libpthread
>>  - you don't need to define your own rule just for building
>>  - use TEST_GEN_PROGS to hook into the right parts of lib.mk
>>  - .. which means you can use the clean rule in lib.mk
>> 
>> 
>> I notice you didn't add rseq or cpu-opv to the list of TARGETS in
>> tools/testing/selftests/Makefile, was that deliberate?
>
> No, I think I just copied some other selftest which perhaps did
> not have those rules back then.

OK. I don't see why these tests shouldn't be part of the default test
run, so here's a patch to add them.

cheers


diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index ff805643b5f7..b79ef5915c74 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -3,6 +3,7 @@ TARGETS += breakpoints
 TARGETS += capabilities
 TARGETS += cpufreq
 TARGETS += cpu-hotplug
+TARGETS += cpu-opv
 TARGETS += efivarfs
 TARGETS += exec
 TARGETS += firmware
@@ -23,6 +24,7 @@ TARGETS += nsfs
 TARGETS += powerpc
 TARGETS += pstore
 TARGETS += ptrace
+TARGETS += rseq
 TARGETS += seccomp
 TARGETS += sigaltstack
 TARGETS += size