Messages in this thread | | | Date | Mon, 22 Jan 2018 18:40:31 +0100 | From | Peter Zijlstra <> | Subject | Re: Spurious lockdep splat in v4.15-rc9 |
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On Mon, Jan 22, 2018 at 09:10:18AM -0800, Tejun Heo wrote: > Hello, Peter, Ingo. > > I get the below lockdep warning if I try to write a config into cgroup > cpu.max file. It's warning about A-A deadlock, but it's obviously > spurious - the system doesn't lock up and the warning is about two > get_online_cpus() calls nesting.
Looks real, just not instantly fatal. It would generate an actual deadlock the moment there is a contending hotplug operation around though.
I'll have a wee look.
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