Messages in this thread | | | Date | Tue, 23 Feb 2021 10:05:29 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v10 2/5] sched: CGroup tagging interface for core scheduling |
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On Mon, Feb 22, 2021 at 11:00:37PM -0500, Chris Hyser wrote: > On 1/22/21 8:17 PM, Joel Fernandes (Google) wrote: > While trying to test the new prctl() code I'm working on, I ran into a bug I > chased back into this v10 code. Under a fair amount of stress, when the > function __sched_core_update_cookie() is ultimately called from > sched_core_fork(), the system deadlocks or otherwise non-visibly crashes. > I've not had much success figuring out why/what. I'm running with LOCKDEP on > and seeing no complaints. Duplicating it only requires setting a cookie on a > task and forking a bunch of threads ... all of which then want to update > their cookie.
Can you share the code and reproducer?
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