From: "Theodore Ts'o" <tytso@mit.edu>
To: Frank Rowand <frowand.list@gmail.com>
Cc: Tim.Bird@sony.com, knut.omang@oracle.com,
gregkh@linuxfoundation.org, brendanhiggins@google.com,
keescook@google.com, kieran.bingham@ideasonboard.com,
mcgrof@kernel.org, robh@kernel.org, sboyd@kernel.org,
shuah@kernel.org, devicetree@vger.kernel.org,
dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com,
linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org,
linux-um@lists.infradead.org, Alexander.Levin@microsoft.com,
amir73il@gmail.com, dan.carpenter@oracle.com,
dan.j.williams@intel.com, daniel@ffwll.ch, jdike@addtoit.com,
joel@jms.id.au, julia.lawall@lip6.fr, khilman@baylibre.com,
logang@deltatee.com, mpe@ellerman.id.au, pmladek@suse.com,
richard@nod.at, rientjes@google.com, rostedt@goodmis.org,
wfg@linux.intel.com
Subject: Re: [PATCH v2 00/17] kunit: introduce KUnit, the Linux kernel unit testing framework
Date: Thu, 9 May 2019 17:42:33 -0400 [thread overview]
Message-ID: <20190509214233.GA20877@mit.edu> (raw)
In-Reply-To: <875c546d-9713-bb59-47e4-77a1d2c69a6d@gmail.com>
On Thu, May 09, 2019 at 11:12:12AM -0700, Frank Rowand wrote:
>
> "My understanding is that the intent of KUnit is to avoid booting a kernel on
> real hardware or in a virtual machine. That seems to be a matter of semantics
> to me because isn't invoking a UML Linux just running the Linux kernel in
> a different form of virtualization?
>
> So I do not understand why KUnit is an improvement over kselftest.
>
> ...
>
> What am I missing?"
One major difference: kselftest requires a userspace environment; it
starts systemd, requires a root file system from which you can load
modules, etc. Kunit doesn't require a root file system; doesn't
require that you start systemd; doesn't allow you to run arbitrary
perl, python, bash, etc. scripts. As such, it's much lighter weight
than kselftest, and will have much less overhead before you can start
running tests. So it's not really the same kind of virtualization.
Does this help?
- Ted
next prev parent reply other threads:[~2019-05-09 21:44 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-01 23:01 [PATCH v2 00/17] kunit: introduce KUnit, the Linux kernel unit testing framework Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 01/17] kunit: test: add KUnit test runner core Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 02/17] kunit: test: add test resource management API Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 03/17] kunit: test: add string_stream a std::stream like string builder Brendan Higgins
2019-05-03 1:26 ` shuah
2019-05-03 4:37 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 04/17] kunit: test: add kunit_stream a std::stream like logger Brendan Higgins
2019-05-02 11:00 ` Greg KH
2019-05-02 20:25 ` Brendan Higgins
2019-05-02 21:18 ` Frank Rowand
2019-05-03 1:50 ` shuah
2019-05-03 5:48 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 05/17] kunit: test: add the concept of expectations Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 06/17] kbuild: enable building KUnit Brendan Higgins
2019-05-10 3:03 ` Masahiro Yamada
2019-05-10 10:27 ` Brendan Higgins
2019-05-10 10:30 ` Masahiro Yamada
2019-05-10 10:33 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 07/17] kunit: test: add initial tests Brendan Higgins
2019-05-02 10:58 ` Greg KH
2019-05-02 20:30 ` Brendan Higgins
2019-05-03 1:27 ` shuah
2019-05-03 5:18 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 08/17] kunit: test: add support for test abort Brendan Higgins
2019-05-03 3:14 ` Logan Gunthorpe
2019-05-03 6:48 ` Brendan Higgins
2019-05-03 12:33 ` Logan Gunthorpe
2019-05-06 8:48 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 09/17] kunit: test: add tests for kunit " Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 10/17] kunit: test: add the concept of assertions Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 11/17] kunit: test: add test managed resource tests Brendan Higgins
2019-05-03 14:34 ` shuah
2019-05-06 9:03 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 12/17] kunit: tool: add Python wrappers for running KUnit tests Brendan Higgins
2019-05-02 11:02 ` Greg KH
2019-05-02 18:07 ` Brendan Higgins
2019-05-02 21:16 ` Frank Rowand
2019-05-02 23:45 ` Brendan Higgins
2019-05-03 1:45 ` Frank Rowand
2019-05-03 5:36 ` Brendan Higgins
2019-05-03 18:59 ` Frank Rowand
2019-05-03 23:14 ` Brendan Higgins
2019-05-04 10:42 ` Greg KH
2019-05-06 0:19 ` Frank Rowand
2019-05-06 17:43 ` Kees Cook
2019-05-06 21:42 ` Brendan Higgins
2019-05-06 21:39 ` Brendan Higgins
2019-05-07 19:13 ` Tim.Bird
2019-05-03 6:41 ` Greg KH
2019-05-01 23:01 ` [PATCH v2 13/17] kunit: defconfig: add defconfigs for building " Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 14/17] Documentation: kunit: add documentation for KUnit Brendan Higgins
2019-05-09 5:08 ` Randy Dunlap
2019-05-09 17:38 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 15/17] MAINTAINERS: add entry for KUnit the unit testing framework Brendan Higgins
2019-05-03 14:38 ` shuah
2019-05-06 9:18 ` Brendan Higgins
2019-05-01 23:01 ` [PATCH v2 16/17] kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec() Brendan Higgins
2019-05-02 11:03 ` Greg KH
2019-05-02 18:14 ` Tim.Bird
2019-05-02 18:45 ` Brendan Higgins
2019-05-03 6:42 ` Greg KH
2019-05-03 23:41 ` Brendan Higgins
2019-05-04 10:40 ` Greg KH
2019-05-01 23:01 ` [PATCH v2 17/17] MAINTAINERS: add proc sysctl KUnit test to PROC SYSCTL section Brendan Higgins
2019-05-02 10:50 ` [PATCH v2 00/17] kunit: introduce KUnit, the Linux kernel unit testing framework Greg KH
2019-05-02 11:05 ` Greg KH
2019-05-03 0:41 ` Brendan Higgins
2019-05-02 14:04 ` shuah
2019-05-03 0:44 ` Brendan Higgins
2019-05-03 3:18 ` Logan Gunthorpe
2019-05-07 3:14 ` Frank Rowand
2019-05-07 8:01 ` Greg KH
2019-05-07 15:23 ` shuah
2019-05-09 1:01 ` Frank Rowand
2019-05-07 17:22 ` Theodore Ts'o
2019-05-08 19:17 ` Brendan Higgins
2019-05-09 0:58 ` Frank Rowand
2019-05-09 1:44 ` Theodore Ts'o
2019-05-09 2:18 ` Frank Rowand
2019-05-14 8:22 ` Brendan Higgins
2019-05-09 0:43 ` Frank Rowand
2019-05-09 1:58 ` Theodore Ts'o
2019-05-09 2:13 ` Frank Rowand
2019-05-09 3:20 ` Theodore Ts'o
2019-05-09 11:52 ` Knut Omang
2019-05-09 13:35 ` Theodore Ts'o
2019-05-09 14:48 ` Knut Omang
2019-05-09 17:00 ` Tim.Bird
2019-05-09 17:42 ` Daniel Vetter
2019-05-09 18:12 ` Frank Rowand
2019-05-09 21:42 ` Theodore Ts'o [this message]
2019-05-09 22:20 ` Logan Gunthorpe
2019-05-09 23:30 ` Theodore Ts'o
2019-05-09 23:40 ` Logan Gunthorpe
2019-05-10 4:47 ` Theodore Ts'o
2019-05-10 5:18 ` Frank Rowand
2019-05-10 5:48 ` Knut Omang
2019-05-10 8:12 ` Daniel Vetter
2019-05-10 10:23 ` Brendan Higgins
2019-05-10 12:12 ` Knut Omang
2019-05-10 20:54 ` Brendan Higgins
2019-05-10 22:18 ` Frank Rowand
2019-05-11 6:17 ` Knut Omang
2019-05-14 6:39 ` Brendan Higgins
2019-05-10 21:59 ` Frank Rowand
2019-05-11 6:43 ` Knut Omang
2019-05-14 8:00 ` Brendan Higgins
2019-05-10 11:36 ` Knut Omang
2019-05-10 16:17 ` Logan Gunthorpe
2019-05-10 22:13 ` Frank Rowand
2019-05-14 8:38 ` Brendan Higgins
2019-05-15 0:14 ` Frank Rowand
2019-05-15 0:26 ` Logan Gunthorpe
2019-05-10 21:52 ` Frank Rowand
2019-05-14 20:54 ` Brendan Higgins
2019-05-10 21:12 ` Frank Rowand
2019-05-11 17:33 ` Theodore Ts'o
2019-05-13 14:44 ` Daniel Vetter
2019-05-14 6:04 ` Brendan Higgins
2019-05-14 12:05 ` Daniel Vetter
2019-05-14 18:36 ` Brendan Higgins
2019-05-15 7:41 ` Daniel Vetter
2019-05-22 21:38 ` Brendan Higgins
2019-05-23 8:40 ` Daniel Vetter
2019-05-15 0:26 ` Frank Rowand
2019-05-15 4:28 ` Theodore Ts'o
2019-05-10 5:11 ` Frank Rowand
2019-05-10 10:43 ` Theodore Ts'o
2019-05-10 21:05 ` Frank Rowand
2019-05-09 15:19 ` Masahiro Yamada
2019-05-10 10:25 ` Brendan Higgins
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