Messages in this thread | | | Date | Wed, 4 Apr 2007 12:04:31 +0200 | From | Ingo Molnar <> | Subject | Re: [RFC] Cpu-hotplug: Using the Process Freezer (try2) |
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* Srivatsa Vaddagiri <vatsa@in.ibm.com> wrote:
> > Rafael has already sent out the fix for that, but for some reason I > > don't see it in the -mm. > > > > With that fix, freezer and hence hotplug succeeds even when I am > > running a 'make -j' test.
nice!
> Good to know that! > > So Ingo/Rafael, should we ignore the problem of "TASK_UNINTERRUPTIBLE > sleepers can break freezer" for the timebeing? Mainly because its not > trivial to solve and we need to tackle it case by case basis as and > when users report specific problems.
yeah, i think you are right - and the TASK_UNINTERRUPTIBLE thing is not only quite complex, it also breaks the symmetry of freezer use (sw-suspend obviously cannot freeze uninterruptible tasks). We should watch whether the current latency of freezing is good enough in practice.
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