On Wed, Apr 15, 2020 at 06:03:55PM +0900, Masami Hiramatsu wrote: > On Tue, 14 Apr 2020 13:32:20 +0200 > Vlastimil Babka <vbabka@xxxxxxx> wrote: > > diff --git a/init/main.c b/init/main.c > > index a48617f2e5e5..7b43118215d6 100644 > > --- a/init/main.c > > +++ b/init/main.c > > @@ -1372,6 +1372,8 @@ static int __ref kernel_init(void *unused) > > > > rcu_end_inkernel_boot(); > > > > + do_sysctl_args(); > > + > > Ah, I see. Since the sysctl is designed to be called after all __init calls were > done, it shouldn't use bootconfig directly because bootconfig is full of __init > call. The idea is bootconfig would be useful in the sense of a library set of helpers which could be modified to remove __init, and then used to instrument the cmdline depending on certain debugging kconfig entries. We currently have no way to purposely extend / break the cmdline for debugging purposes, so, bootconfig's parsers, since it already has a way to extend the cmdlineline, might make it much easier to do this later. Without bootconfig, if we wanted to add new kconfig to, for example, add new funny cmdline arguments to test they worked or not, we'd have to devise our own set of helpers now. ie, new functionality. bootconfig however already has existing functionality to tweak the cmdline, and so some code could be leveraged there for this purpose. Luis
