Messages in this thread | | | From | Christian Borntraeger <> | Subject | Re: [PATCH/RFC] stop_machine: make stop_machine_run more virtualization friendly | Date | Thu, 8 May 2008 16:41:20 +0200 |
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Am Donnerstag, 8. Mai 2008 schrieb Jeremy Fitzhardinge: > Christian Borntraeger wrote: > > On kvm I have seen some rare hangs in stop_machine when I used more guest > > cpus than hosts cpus. e.g. 32 guest cpus on 1 host cpu triggered the > > hang quite often. I could also reproduce the problem on a 4 way z/VM host with > > a 64 way guest. > > > > I think that's one of those "don't do that then" cases ;)
I really like 64 guest cpus as a good testcase for all kind of things.
> > I think x86 (at least) is now using ticket locks, which is fair. Which > kernel are you seeing this problem on?
Sorry, forgot to mention. Its kvm.git from 2 days ago on s390.
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