lkml.org 
[lkml]   [2008]   [Aug]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 6/6] sched: disabled rt-bandwidth by default
From
Date
On Thu, 2008-08-28 at 13:50 +0200, Andi Kleen wrote:
> On Thu, Aug 28, 2008 at 01:19:13PM +0200, Peter Zijlstra wrote:
> > On Thu, 2008-08-28 at 13:09 +0200, Andi Kleen wrote:
> > > > Even if the system has multiple CPUs, and even if just a single CPU is
> > > > fully utilized by an RT task, without the rt-limit the system will still
> > > > lock up in practice due to various other factors: workqueues and tasks
> > > > being 'stuck' on CPUs that host an RT hog.
> > >
> > > The load balancer will not notice that a particular CPU is busy
> > > with real time tasks?
> >
> > Not currently, working on that though.
>
> I wonder if it would make sense to break affinities in extreme case?
> With that even the workqueues would work again.

Then people can no longer assume stuff like queue_work_on() etc.. works.
Users of such code might depend on it actually running on the specified
cpu.





\
 
 \ /
  Last update: 2008-08-28 14:05    [W:0.074 / U:57.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site