For all ya BFS (brain fuck scheduler) lovers out there

[William Kenworthy]

On Wed, 2009-09-16 at 21:21 +1200, Robin Paulson wrote:
> 2009/9/14 Paul Fertser <fercerpav at gmail.com>:
> > Read all the details at [1] and to try it on your devices, simply do:
> >
> > mkdir /debug
> > mount -t debugfs none /debug
> > echo NO_NEW_FAIR_SLEEPERS > /debug/sched_features
> 
> how often, if at all, will this get returned to the default value?
> 
> every reboot?
> 
> every upgrade of kernel?
> 
> of some module?
> 
> when i do a cat, it returns this:
> 
> NEW_FAIR_SLEEPERS NORMALIZED_SLEEPER WAKEUP_PREEMPT START_DEBIT
> AFFINE_WAKEUPS CACHE_HOT_BUDDY SYNC_WAKEUPS NO_HRTICK NO_DOUBLE_TICK
> ASYM_GRAN LB_BIAS LB_WAKEUP_UPDATE ASYM_EFF_LOAD NO_WAKEUP_OVERLAP
> LAST_BUDDY
> 
> has it been overwritten already, by a reboot? it looks like it has
> 
> cheers
> 
debugfs is a virtual filesystem that gives access to some otherwise
unavailable system bits and pieces.  Because its "virtual", its going to
dissappear when the FR is rebooted, and "may" even be reset when you
unmount debugfs (have not tested this yet).  debugfs is also a
developers tool, not a normal user tool - google will help you
understand whats happening.

BillK