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From: Luis Chamberlain <mcgrof@kernel.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>,
	tj@kernel.org, shuah@kernel.org, akpm@linux-foundation.org,
	rafael@kernel.org, davem@davemloft.net, kuba@kernel.org,
	ast@kernel.org, andriin@fb.com, daniel@iogearbox.net,
	atenart@kernel.org, alobakin@pm.me, weiwan@google.com,
	ap420073@gmail.com, jeyu@kernel.org, ngupta@vflare.org,
	sergey.senozhatsky.work@gmail.com, minchan@kernel.org,
	axboe@kernel.dk, mbenes@suse.com, jpoimboe@redhat.com,
	tglx@linutronix.de, keescook@chromium.org, jikos@kernel.org,
	rostedt@goodmis.org, peterz@infradead.org,
	linux-block@vger.kernel.org, netdev@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/4] selftests: add tests_sysfs module
Date: Fri, 23 Jul 2021 10:32:50 -0700	[thread overview]
Message-ID: <20210723173250.u6444kg7a5ktnyiv@garbanzo> (raw)
In-Reply-To: <YPqcIzKpEXftpZM8@kroah.com>

On Fri, Jul 23, 2021 at 12:38:27PM +0200, Greg KH wrote:
> On Thu, Jul 22, 2021 at 03:34:49PM -0700, Luis Chamberlain wrote:
> > kunit relies on UML and UML is a simple one core architecture, to start
> > with.
> 
> I thought the UML requirement was long gone, are you sure it is still
> present?

It's *the* way to run kunit.

> > This means I cannot run tests for multicore with it, which is
> > where many races do happen! Yes, you can run kunit on other
> > architectures, but all that is new.
> 
> What do you mean by "new"?  It should work today, in today's kernel
> tree, right?

That was experimental. And I know no one using it.

> > In this case kunit is not ideal given I want to mimic something in
> > userspace interaction, and expose races through error injection and
> > if we can use as many cores to busy races out.
> 
> Can you not do that with kunit?  If not, why not?

kunit requires codifying everything in C, what we need is a lot of
flexibility to do all sorts of races in userspace, and actually use
userspace tools.

I am *not* going to even try to rewrite my selftest as a kunit test.
It is just not going to happen.

  Luis

  reply	other threads:[~2021-07-23 17:32 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-03  0:46 [PATCH v2 0/4] selftests: add a new test driver for sysfs Luis Chamberlain
2021-07-03  0:46 ` [PATCH v2 1/4] selftests: add tests_sysfs module Luis Chamberlain
2021-07-21 11:32   ` Greg KH
2021-07-22 22:34     ` Luis Chamberlain
2021-07-23 10:38       ` Greg KH
2021-07-23 17:32         ` Luis Chamberlain [this message]
2021-07-03  0:46 ` [PATCH v2 2/4] kernfs: add initial failure injection support Luis Chamberlain
2021-07-03  0:46 ` [PATCH v2 3/4] test_sysfs: add support to use kernfs failure injection Luis Chamberlain
2021-07-03  0:46 ` [PATCH v2 4/4] test_sysfs: demonstrate deadlock fix Luis Chamberlain
2021-07-03  4:49   ` Greg KH
2021-07-03 17:28     ` Luis Chamberlain
2021-07-21 11:33       ` Greg KH
2021-07-22 22:36         ` Luis Chamberlain

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