DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4B88219A8
Date: Wed, 14 Jun 2017 13:53:13 +0900
From: Masami Hiramatsu <mhiramat@kernel.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
        Shuah Khan <shuahkh@osg.samsung.com>, Shuah Khan <shuah@kernel.org>,
        linux-kselftest@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/7] selftests/ftrace: Some improvements of ftracetest
Message-Id: <20170614135313.04e2f0b0596bbb9057ce557b@kernel.org>
In-Reply-To: <20170614111217.46825d2caf31eae9edb72162@kernel.org>
References: <149551934796.30231.12544755801380678045.stgit@devbox>
        <4b0b2ac8-dfba-abd9-3dba-bbe73c22f79f@kernel.org>
        <20170607185628.452a11a1@gandalf.local.home>
        <8f974157-c2e5-9b39-c55b-b637d6e7814f@osg.samsung.com>
        <20170608133743.4720e2bc@gandalf.local.home>
        <8bcf5a87-812a-6ceb-7fa4-ea2d33d4e717@osg.samsung.com>
        <20170608170844.134e1158@gandalf.local.home>
        <9a2b4e46-a545-b862-2517-472f364a68b3@osg.samsung.com>
        <20170608172627.3dab319e@gandalf.local.home>
        <9be74d50-aee5-4771-a62c-e04156176263@osg.samsung.com>
        <20170608173946.7c9308f2@gandalf.local.home>
        <052a7347-be6e-42e2-de5e-6f5849fa1e8e@osg.samsung.com>
        <20170608175144.205894cb@gandalf.local.home>
        <20170614111217.46825d2caf31eae9edb72162@kernel.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 2024
Lines: 64

On Wed, 14 Jun 2017 11:12:17 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:

> Hi Shuah and Steve,
> 
> Sorry for replying so late...
> 
> On Thu, 8 Jun 2017 17:51:44 -0400
> Steven Rostedt <rostedt@goodmis.org> wrote:
> 
> > On Thu, 8 Jun 2017 15:44:08 -0600
> > Shuah Khan <shuahkh@osg.samsung.com> wrote:
> > 
> > > > Also, did you see my reply about having the right config? You have
> > > > HIST_TRIGGERS undefined but yet the histogram trigger tests all pass in
> > > > your report.  
> > > 
> > > I did see that one. Didn't get a chance to look at that yet. Do you expect
> > > the tests to be skipped in this case? Could it be that tests aren't run?
> > > I will look at this and let you know what I find on my test system.
> > 
> > Your first email showed that they passed, which would be hard to do
> > since the feature is not even enabled. ftracetest is very much set up
> > to look at the existing pseudo files to determine if a feature exists
> > or not, and if it does not, it returns "UNSUPPORTED". If it returned
> > PASSED when the feature is not enabled, that would be a big time bug in
> > the test.
> 
> As far as I can see, what Steve you saw was my result on the 4.9 stable
> kernel, which had been compiled with fully ftrace enabled :).
> 
> > > 
> > > > 
> > > > One more thing, is this 100% reproducible. That is, does it always fail?
> > > >   
> > > Failed the two times I tried.
> 
> I've also tried to test the latest linus tree with this series with Shuah's
> config on qemu, and could not reproduced it. (I attached the log)
> As you can see, with Shuah's config, histogram tests are marked UNSUPPORTED.
> 
> Of course, that is 4.12.0-rc5+ and kconfig is a bit tweaked(attached).
> I'll try kselftest tree too.

I've tried it on linux-kselftest/next, but not able to reproduce it...

Thank you,

> 
> Thank you,
> 
> > 
> > Great to hear. I like reproducibility :-)
> > 
> > -- Steve
> > 
> 
> 
> -- 
> Masami Hiramatsu <mhiramat@kernel.org>


-- 
Masami Hiramatsu <mhiramat@kernel.org>