Messages in this thread | | | Date | Wed, 11 May 2005 13:45:54 -0700 | From | Paul Jackson <> | Subject | Re: [Lse-tech] [PATCH] cpusets+hotplug+preepmt broken |
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Nathan asked: > Won't holding cpuset_sem while calling cpuset_cpus_allowed cause a > deadlock?
It definitely would, which is why Dinakar's patch both added a call to get cpuset_sem earlier in the hot unplug code, as well as removed the call to get cpuset_sem that was inside the cpuset_cpus_allowed code (as well as modified the other caller of cpuset_cpus_allowed, the sched_setaffinity code, to explicitly get cpuset_sem before calling cpuset_cpus_allowed, since that call no longer acquired cpuset_sem on its own.
-- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson <pj@engr.sgi.com> 1.650.933.1373, 1.925.600.0401 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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