> > writeback: remove the internal 5% low bound on dirty_ratio
quoted text
> > 
> > The dirty_ratio was silently limited in global_dirty_limits() to >= 5%.
> > This is not a user expected behavior. And it's inconsistent with
> > calc_period_shift(), which uses the plain vm_dirty_ratio value.
> > 
> > Let's rip the internal bound.
> > 
> > At the same time, fix balance_dirty_pages() to work with the
> > dirty_thresh=0 case. This allows applications to proceed when
> > dirty+writeback pages are all cleaned.
> 
> And ">" fits with the name "exceeded" better than ">=" does.  I think it is
> an aesthetic improvement as well as a functional one.
> 
> Reviewed-by: NeilBrown <neilb@suse.de>

I agree :)
	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>




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