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From: Kieran Bingham <kieran.bingham@ideasonboard.com>
To: Brendan Higgins <brendanhiggins@google.com>
Cc: brakmo@fb.com, dri-devel@lists.freedesktop.org,
	linux-kselftest@vger.kernel.org, shuah@kernel.org,
	Rob Herring <robh@kernel.org>,
	Frank Rowand <frowand.list@gmail.com>,
	linux-nvdimm@lists.01.org, richard@nod.at,
	Knut Omang <knut.omang@oracle.com>,
	Felix Guo <felixguoxiuping@gmail.com>,
	Joel Stanley <joel@jms.id.au>,
	jdike@addtoit.com, Tim.Bird@sony.com,
	Kees Cook <keescook@google.com>,
	linux-um@lists.infradead.org,
	Steven Rostedt <rostedt@goodmis.org>,
	Julia Lawall <julia.lawall@lip6.fr>,
	kunit-dev@googlegroups.com, Greg KH <gregkh@linuxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Luis Chamberlain <mcgrof@kernel.org>,
	Daniel Vetter <daniel@ffwll.ch>,
	mpe@ellerman.id.au, joe@perches.com, khilman@baylibre.com
Subject: Re: [RFC v3 14/19] Documentation: kunit: add documentation for KUnit
Date: Wed, 13 Feb 2019 21:55:39 +0000
Message-ID: <eade3052-0aa4-90b4-d55b-8c44556f98bc@ideasonboard.com> (raw)
In-Reply-To: <CAFd5g46AEquMKzfrjLDVi+PP5-7aGs6C6pCunGAXDn3VRkJP+g@mail.gmail.com>

Hi Brendan,

On 12/02/2019 22:10, Brendan Higgins wrote:
> On Mon, Feb 11, 2019 at 4:16 AM Kieran Bingham
> <kieran.bingham@ideasonboard.com> wrote:
>>
>> Hi Brendan,
>>
>> On 09/02/2019 00:56, Brendan Higgins wrote:
>>> On Thu, Dec 6, 2018 at 4:16 AM Kieran Bingham
>>> <kieran.bingham@ideasonboard.com> wrote:
>>>>
>>>> Hi Brendan,
>>>>
>>>> On 03/12/2018 23:53, Brendan Higgins wrote:
>>>>> On Thu, Nov 29, 2018 at 7:45 PM Luis Chamberlain <mcgrof@kernel.org> wrote:
>>>>>>
>>>>>> On Thu, Nov 29, 2018 at 01:56:37PM +0000, Kieran Bingham wrote:
>>>>>>> Hi Brendan,
>>>>>>>
>>>>>>> Please excuse the top posting, but I'm replying here as I'm following
>>>>>>> the section "Creating a kunitconfig" in Documentation/kunit/start.rst.
>>>>>>>
>>>>>>> Could the three line kunitconfig file live under say
>>>>>>>        arch/um/configs/kunit_defconfig?
>>>>
>>>>
>>>> Further consideration to this topic - I mentioned putting it in
>>>>   arch/um/configs
>>>>
>>>> - but I think this is wrong.
>>>>
>>>> We now have a location for config-fragments, which is essentially what
>>>> this is, under kernel/configs
>>>>
>>>> So perhaps an addition as :
>>>>
>>>>  kernel/configs/kunit.config
>>>>
>>>> Would be more appropriate - and less (UM) architecture specific.
>>>
>>> Sorry for the long radio silence.
>>>
>>> I just got around to doing this and I found that there are some
>>> configs that are desirable to have when running KUnit under x86 in a
>>> VM, but not UML.
>>
>> Should this behaviour you mention be handled by the KCONFIG depends flags?
>>
>> depends on (KUMIT & UML)
>> or
>> depends on (KUNIT & !UML)
>>
>> or such?
> 
> Not really. Anything that is strictly necessary to run KUnit on an
> architectures should of course be turned on as a dependency like you
> suggest, but I am talking about stuff that you would probably want to
> get yourself going, but is by no means necessary.
> 
>>
>> An example of which configs you are referring to would help to
>> understand the issue perhaps.
>>
> 
> For example, you might want to enable a serial console that is known
> to work with a fairly generic qemu setup when building for x86:
> CONFIG_SERIAL_8250=y
> CONFIG_SERIAL_8250_CONSOLE=y
> 
> Obviously not a dependency, and not even particularly useful to people
> who know what they are doing, but to someone who is new or just wants
> something to work out of the box would probably want that.

It sounds like that would be a config fragment for qemu ?

Although - perhaps this is already covered by the following fragment:
   kernel/configs/kvm_guest.config


>>> So should we have one that goes in with
>>> config-fragments and others that go into architectures? Another idea,
>>> it would be nice to have a KUnit config that runs all known tests
>>
>> This might also be a config option added to the tests directly like
>> COMPILE_TEST perhaps?
> 
> That just allows a bunch of drivers to be compiled, it does not
> actually go through and turn the configs on, right? I mean, there is
> no a priori way to know that there is a configuration which spans all
> possible options available under COMPILE_TEST, right? Maybe I
> misunderstand what you are suggesting...

Bah - you're right of course. I was mis-remembering the functionality of
COMPILE_TEST as if it were some sort of 'select' but it's just an enable..

Sorry for the confusion.



>> (Not sure what that would be called though ... KUNIT_RUNTIME_TEST?)
>>
>> I think that might be more maintainable as otherwise each new test would
>> have to modify the {min,def}{config,fragment} ...
>>
> 
> Looking at kselftest-merge, they just start out with a set of
> fragments in which the union should contain all tests and then merge
> it with a base .config (probably intended to be $(ARCH)_defconfig).
> However, I don't know if that is the state of the art.
> 
>>
>>> (this probably won't work in practice once we start testing mutually
>>> exclusive things or things with lots of ifdeffery, but it probably
>>> something we should try to maintain as best as we can?); this probably
>>> shouldn't go in with the fragments, right?
>>
>> Sounds like we agree there :)
> 
> Totally. Long term we will need something a lot more sophisticated
> than anything under discussion here. I was talking about this with
> Luis on another thread:
> https://groups.google.com/forum/#!topic/kunit-dev/EQ1x0SzrUus (feel
> free to chime in!). Nevertheless, that's a really hard problem and I
> figure some variant of defconfigs and config fragments will work well
> enough until we reach that point.
> 
>>
>>>
>>> I will be sending another revision out soon, but I figured I might be
>>> able to catch you before I did so.
>>
>> Thanks for thinking of me.
> 
> How can I forget? You have been super helpful!
> 
>> I hope I managed to reply in time to help and not hinder your progress.
> 
> Yep, no trouble at all. You are the one helping me :-)
> 
> Thanks!
> 

-- 
Regards
--
Kieran
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  reply index

Thread overview: 118+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-28 19:36 [RFC v3 00/19] kunit: introduce KUnit, the Linux kernel unit testing framework Brendan Higgins
2018-11-28 19:36 ` [RFC v3 01/19] kunit: test: add KUnit test runner core Brendan Higgins
2018-11-30  3:14   ` Luis Chamberlain
2018-12-01  1:51     ` Brendan Higgins
2018-12-01  2:57       ` Luis Chamberlain
2018-12-05 13:15     ` Anton Ivanov
2018-12-05 14:45       ` Arnd Bergmann
2018-12-05 14:49         ` Anton Ivanov
2018-11-30  3:28   ` Luis Chamberlain
     [not found]     ` <20181130032802.GG18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-01  2:08       ` Brendan Higgins
2018-12-01  3:10         ` Luis Chamberlain
     [not found]           ` <20181201031049.GL28501-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 22:47             ` Brendan Higgins
2018-12-01  3:02   ` Luis Chamberlain
2018-11-28 19:36 ` [RFC v3 10/19] kunit: test: add test managed resource tests Brendan Higgins
     [not found] ` <20181128193636.254378-1-brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2018-11-28 19:36   ` [RFC v3 02/19] kunit: test: add test resource management API Brendan Higgins
2018-11-28 19:36   ` [RFC v3 03/19] kunit: test: add string_stream a std::stream like string builder Brendan Higgins
2018-11-30  3:29     ` Luis Chamberlain
2018-12-01  2:14       ` Brendan Higgins
2018-12-01  3:12         ` Luis Chamberlain
2018-12-03 10:55       ` Petr Mladek
2018-12-04  0:35         ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 04/19] kunit: test: add test_stream a std::stream like logger Brendan Higgins
2018-11-28 19:36   ` [RFC v3 05/19] kunit: test: add the concept of expectations Brendan Higgins
2018-11-28 19:36   ` [RFC v3 06/19] arch: um: enable running kunit from User Mode Linux Brendan Higgins
2018-11-28 21:26     ` Rob Herring
2018-11-30  3:37       ` Luis Chamberlain
2018-11-30 14:05         ` Rob Herring
2018-11-30 18:22           ` Luis Chamberlain
     [not found]             ` <20181130182203.GS18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 23:22               ` Brendan Higgins
2018-11-30  3:30     ` Luis Chamberlain
2018-11-28 19:36   ` [RFC v3 07/19] kunit: test: add initial tests Brendan Higgins
2018-11-30  3:40     ` Luis Chamberlain
2018-12-03 23:26       ` Brendan Higgins
2018-12-03 23:43         ` Luis Chamberlain
2018-11-28 19:36   ` [RFC v3 08/19] arch: um: add shim to trap to allow installing a fault catcher for tests Brendan Higgins
2018-11-30  3:34     ` Luis Chamberlain
     [not found]       ` <20181130033429.GK18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 23:34         ` Brendan Higgins
     [not found]           ` <CAFd5g45+MAVaSW8HN9x57Y8Um=TV1Oa=-K8yExPBS-4KjLyciQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-12-03 23:46             ` Luis Chamberlain
     [not found]               ` <20181203234628.GR28501-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-04  0:44                 ` Brendan Higgins
2018-11-30  3:41     ` Luis Chamberlain
2018-12-03 23:37       ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 09/19] kunit: test: add the concept of assertions Brendan Higgins
2018-11-28 19:36   ` [RFC v3 11/19] kunit: add Python libraries for handing KUnit config and kernel Brendan Higgins
2018-11-29 13:54     ` Kieran Bingham
     [not found]       ` <841cf4ae-501b-05ae-5863-a51010709b67-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>
2018-12-03 23:48         ` Brendan Higgins
2018-12-04 20:47           ` Luis Chamberlain
2018-12-06 12:32             ` Kieran Bingham
2018-12-06 15:37               ` Matthew Wilcox
2018-12-07 11:30                 ` Kieran Bingham
2018-12-11 14:09                 ` Petr Mladek
2018-12-11 14:41                   ` Steven Rostedt
2018-12-11 17:01                     ` Anton Ivanov
2019-02-09  0:40                       ` Brendan Higgins
2018-12-07  1:05               ` Luis Chamberlain
2018-12-07 18:35               ` Kent Overstreet
2018-11-30  3:44     ` Luis Chamberlain
2018-12-03 23:50       ` Brendan Higgins
2018-12-04 20:48         ` Luis Chamberlain
2018-11-28 19:36   ` [RFC v3 12/19] kunit: add KUnit wrapper script and simple output parser Brendan Higgins
2018-11-28 19:36   ` [RFC v3 13/19] kunit: improve output from python wrapper Brendan Higgins
2018-11-28 19:36   ` [RFC v3 14/19] Documentation: kunit: add documentation for KUnit Brendan Higgins
2018-11-29 13:56     ` Kieran Bingham
2018-11-30  3:45       ` Luis Chamberlain
     [not found]         ` <20181130034525.GP18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 23:53           ` Brendan Higgins
2018-12-06 12:16             ` Kieran Bingham
2019-02-09  0:56               ` Brendan Higgins
2019-02-11 12:16                 ` Kieran Bingham
2019-02-12 22:10                   ` Brendan Higgins
2019-02-13 21:55                     ` Kieran Bingham [this message]
2019-02-14  0:17                       ` Brendan Higgins
2019-02-14 17:26                         ` Luis Chamberlain
2019-02-14 22:07                           ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 15/19] MAINTAINERS: add entry for KUnit the unit testing framework Brendan Higgins
2018-11-28 19:36   ` [RFC v3 17/19] of: unittest: migrate tests to run on KUnit Brendan Higgins
2018-11-28 20:56     ` Rob Herring
2018-11-30  0:39       ` Randy Dunlap
     [not found]         ` <18814973-8f0a-4647-a097-fcc3dc0b3cd3-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2018-12-04  0:13           ` Brendan Higgins
2018-12-04 13:40             ` Rob Herring
     [not found]               ` <CAL_JsqL_PivQbrJFEusdKAy-2EQtKL3OHbmyYSK9bzuTOQegqA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-12-05 23:42                 ` Brendan Higgins
2018-12-07  0:41                   ` Rob Herring
2018-12-04  0:08       ` Brendan Higgins
2019-02-13  1:44       ` Brendan Higgins
2019-02-14 20:10         ` Rob Herring
2019-02-14 21:52           ` Brendan Higgins
2019-02-18 22:56         ` Frank Rowand
2019-02-28  0:29           ` Brendan Higgins
2018-12-04 10:56     ` Frank Rowand
2018-11-28 19:36   ` [RFC v3 18/19] of: unittest: split out a couple of test cases from unittest Brendan Higgins
2018-12-04 10:58     ` Frank Rowand
2018-12-05 23:54       ` Brendan Higgins
2019-02-14 23:57         ` Frank Rowand
2019-02-15  0:56           ` Brendan Higgins
2019-02-15  2:05             ` Frank Rowand
2019-02-15 10:56               ` Brendan Higgins
2019-02-18 22:25                 ` Frank Rowand
2019-02-20 20:44                   ` Frank Rowand
2019-02-20 20:47                     ` Frank Rowand
2019-02-28  3:52                     ` Brendan Higgins
2019-03-22  0:22                       ` Frank Rowand
2019-03-22  1:30                         ` Brendan Higgins
2019-03-22  1:47                           ` Frank Rowand
2019-03-25 22:15                             ` Brendan Higgins
2019-09-20 16:57                           ` Rob Herring
2019-09-21 23:57                             ` Frank Rowand
2019-03-22  1:34                         ` Frank Rowand
2019-03-25 22:18                           ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 19/19] of: unittest: split up some super large test cases Brendan Higgins
2018-11-28 19:36 ` [RFC v3 16/19] arch: um: make UML unflatten device tree when testing Brendan Higgins
2018-11-28 21:16   ` Rob Herring
     [not found]     ` <CAL_JsqK5cG=QzMBFSZ31_-3ujnxqxv=jj3XYajbRLT7yWYZbfw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-12-04  0:00       ` Brendan Higgins
2018-11-30  3:46   ` Luis Chamberlain
2018-12-04  0:02     ` Brendan Higgins
2018-12-04 10:52 ` [RFC v3 00/19] kunit: introduce KUnit, the Linux kernel unit testing framework Frank Rowand
2018-12-04 11:40 ` Frank Rowand
2018-12-04 13:49   ` Rob Herring
2018-12-05 23:10     ` Brendan Higgins
2019-03-22  0:27       ` Frank Rowand
2019-03-25 22:04         ` Brendan Higgins

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