Re: [PATCH 6/6] sched: disabled rt-bandwidth by default

Nick Piggin
2008-08-26T09:55:26Z

On Tuesday 26 August 2008 19:30, Ingo Molnar wrote:
> * Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> > So... no reply to this? I'm really wondering how it's OK to break
> > documented standards and previous Linux behaviour by default for
> > something that it is trivial to solve in userspace? [...]
>
> I disagree

Your arguments were along the line of:

* It probably doesn't break anything (except we had somebody report
that it breaks their app)

* If it does break something then they must be doing something stupid
(I refuted that because there are several legitimate ways to use rt
scheduling that is broken by this)

* We have many other APIs and tools that don't conform to posix (why
is that a reason to break this one?)

* We should break the API to cater for stupid users and distros who
create local DoS and/or lock up their boxes (except this is trivial
to solve by setting sysctls or having a watchdog or using sysrq)

So did I miss some really good argument, or do you really think the
above arguments are a good reason to break the API? If the latter,
then we have to just agree to disagree and I'll ask Linus to arbitrate.
OK?