Messages in this thread | | | Date | Fri, 4 Jun 2010 12:03:06 +0200 | From | Ingo Molnar <> | Subject | Re: suspend blockers & Android integration |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> On Fri, 2010-06-04 at 11:43 +0200, Peter Zijlstra wrote: > > I still believe containment is a cgroup problem. The freeze/snapshot/resume > > container folks seem to face many of the same problems. Including the > > pending timer one I suspect. Lets solve it there. > > While talking to Thomas about this, we'd probably need a CLOCK_MONOTONIC > namespace to pull this off, so that resumed apps don't see the jump in > absolute time. > > This would also help with locating the relevant timers, since they'd be on > the related timer base.
Ok - this looks workable, and looks technically isolated that can be pursued as a separate module of this whole topic.
> The only 'interesting' issue I can see here is that if you create 1000 > CLOCK_MONOTONIC namepaces, we'd need to have a tree of trees in order to > efficiently find the leftmost timer.
Realistically Android userspace would create just a single such namespace for all the untrusted/unknown/uncontrolled apps, right?
Ingo
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