Re: [PATCH tip/core/rcu 07/45] torture: Allow variations of "defconfig" to be specified

From: Paul E. McKenney
Date: Wed May 07 2014 - 22:43:42 EST


On Wed, May 07, 2014 at 06:54:08PM -0700, Josh Triplett wrote:
> On Wed, May 07, 2014 at 04:52:40PM -0700, Paul E. McKenney wrote:
> > On Wed, May 07, 2014 at 02:22:19PM -0700, josh@xxxxxxxxxxxxxxxx wrote:
> > > On Mon, Apr 28, 2014 at 05:24:55PM -0700, Paul E. McKenney wrote:
> > > > From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
> > > >
> > > > Some environments require some variation on "make defconfig" to initialize
> > > > the .config file. This commit therefore adds a --defconfig argument to
> > > > allow this to be specified. The default value is of course "defconfig".
> > > >
> > > > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> > >
> > > <bikeshed color="blue">
> > > "--defconfig randconfig" or "--defconfig allyesconfig" or similar seems
> > > rather odd; how about calling it --kconfig or similar?
> > > </bikeshed>
> >
> > Some day I am going to have to feed that to a browser and see what
> > happens. ;-)
> >
> > I must confess that I hadn't considered feeding randconfig or allyesconfig
> > to that argument, partly because I figured that I would have to also
> > supply Kconfig constraints in those cases in order to ensure that the
> > resulting kernel would actually run under qemu. I was instead thinking
> > in terms of a --configs option beginning with "RAND", which would pick
> > up the Kconfig constraints from the appropriate configs directory,
> > for example:
> >
> > tools/testing/selftests/rcutorture/configs/rcu/RAND1
> >
> > That said, I haven't thought that far down that path.
> >
> > So for the --defconfig argument, I was thinking more in terms of things
> > like pseries_defconfig or versatile_defconfig.
>
> Ah, I see. --defconfig specifies the base configuration, while
> --configs specifies the constraints. In that case, how about
> --baseconfig? It might still make sense to pass --baseconfig
> allnoconfig or --baseconfig allyesconfig or --baseconfig randconfig,
> given a sufficiently complete constraints file.

My choice of name was guided by the following:

$ find arch -name '*defconfig*' -print | wc -l
469

When I try baseconfig:

$ find arch -name '*baseconfig*' -print | wc -l
0

Don't get me wrong, you might be correct here. But the thing is that
I like being able to specify all tests in one go. That means that I
want to still be able to run my current defconfig-based config files
(e.g., TREE01) when I get a randconfig-based setup going. So I would
like to be able to specify something like:

sh kvm.sh --defconfig pseries_defconfig --configs "TREE01 RAND01"

But perhaps there is a better way to do this.

Thanx, Paul

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