Messages in this thread | | | Date | Mon, 1 Jul 2019 21:11:41 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v8 7/8] sched/core: Prevent race condition between cpuset and __sched_setscheduler() |
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On Fri, Jun 28, 2019 at 10:06:17AM +0200, Juri Lelli wrote: > No synchronisation mechanism exists between the cpuset subsystem and > calls to function __sched_setscheduler(). As such, it is possible that > new root domains are created on the cpuset side while a deadline > acceptance test is carried out in __sched_setscheduler(), leading to a > potential oversell of CPU bandwidth. > > Grab cpuset_rwsem read lock from core scheduler, so to prevent > situations such as the one described above from happening. >
ISTR there being a funny vs normalize_rt_tasks(); maybe mention that?
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