Re: [PATCH] mm: add resched points to remap_pmd_range/ioremap_pmd_range

[Michal Hocko]

On Fri 24-07-15 09:56:27, Jörn Engel wrote:
> On Fri, Jul 24, 2015 at 09:04:21AM +0200, Michal Hocko wrote:
> > On Thu 23-07-15 14:54:33, Spencer Baugh wrote:
> > > From: Joern Engel <joern@xxxxxxxxx>
> > > 
> > > Mapping large memory spaces can be slow and prevent high-priority
> > > realtime threads from preempting lower-priority threads for a long time.
> > 
> > How can a lower priority task block the high priority one? Do you have
> > preemption disabled?
> 
> Yes.

Yes what? PREEMT enabled and still low priority task starving a high
priority one? What is your exact setup?
-- 
Michal Hocko
SUSE Labs
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