Re: [PATCH v8 kunit-next 1/4] kunit: add debugfs /sys/kernel/debug/kunit/<suite>/results display

From: Greg KH
Date: Thu Apr 02 2020 - 14:38:46 EST


On Thu, Apr 02, 2020 at 04:27:35PM +0100, Alan Maguire wrote:
> On Wed, 1 Apr 2020, shuah wrote:
>
> > Hi Alan,
> >
> > On 3/26/20 8:25 AM, Alan Maguire wrote:
> > > add debugfs support for displaying kunit test suite results; this is
> > > especially useful for module-loaded tests to allow disentangling of
> > > test result display from other dmesg events. debugfs support is
> > > provided if CONFIG_KUNIT_DEBUGFS=y.
> > >
> > > As well as printk()ing messages, we append them to a per-test log.
> > >
> > > Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
> > > Reviewed-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
> > > Reviewed-by: Frank Rowand <frank.rowand@xxxxxxxx>
> > > ---
> > > include/kunit/test.h | 54 +++++++++++++++---
> > > lib/kunit/Kconfig | 8 +++
> >
> > Missing defaults for config options?
> >
> > > lib/kunit/Makefile | 4 ++
> > > lib/kunit/debugfs.c | 116 ++++++++++++++++++++++++++++++++++++++
> > > lib/kunit/debugfs.h | 30 ++++++++++
> > > lib/kunit/kunit-test.c | 4 +-
> > > lib/kunit/test.c | 147
> > > ++++++++++++++++++++++++++++++++++++++-----------
> > > 7 files changed, 322 insertions(+), 41 deletions(-)
> > > create mode 100644 lib/kunit/debugfs.c
> > > create mode 100644 lib/kunit/debugfs.h
> > >
> >
> > snip
> >
> > > diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig
> > > index 065aa16..95d12e3 100644
> > > --- a/lib/kunit/Kconfig
> > > +++ b/lib/kunit/Kconfig
> > > @@ -14,6 +14,14 @@ menuconfig KUNIT
> > >
> > > if KUNIT
> > >
> > > +config KUNIT_DEBUGFS
> > > + bool "KUnit - Enable /sys/kernel/debug/kunit debugfs representation"
> > > + help
> > > + Enable debugfs representation for kunit. Currently this consists
> > > + of /sys/kernel/debug/kunit/<test_suite>/results files for each
> > > + test suite, which allow users to see results of the last test suite
> > > + run that occurred.
> > > +
> >
> > Any reason why there is default for this option?
> >
> > Same for all other options. I am sending pull request for now without
> > defaults. Would like to see this fixed for rc2.
> >
>
> Sure, I'll send a patch shortly. Just wanted to get opinions
> on what those defaults should be; my working assumption is
>
> - CONFIG_KUNIT should be default n;

No default means 'n', so there's no need to say that at all.

> - CONFIG_KUNIT_DEBUGFS should be default y (enabled by default
> if CONFIG_KUNIT is set);

Why? If it's is 'y', then don't even make it an option at all, just
always have it :)

'y' is almost always reserved for "your machine will not function
properly without this enabled".

> - CONFIG_KUNIT_TEST, CONFIG_KUNIT_EXAMPLE_TEST should be default n

So no need to specify anything, 'n' is the default.

thanks,

greg k-h