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vm_phys: Add corresponding sysctl knob for loader tunable
The loader tunable 'vm.numa.disabled' does not have corresponding sysctl MIB entry. Add it so that it can be retrieved, and `sysctl -T` will also report it correctly. Reviewed by: markj MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D42138
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@ -76,6 +76,12 @@ _Static_assert(sizeof(long long) >= sizeof(vm_paddr_t),
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#ifdef NUMA
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struct mem_affinity __read_mostly *mem_affinity;
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int __read_mostly *mem_locality;
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static int numa_disabled;
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static SYSCTL_NODE(_vm, OID_AUTO, numa, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
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"NUMA options");
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SYSCTL_INT(_vm_numa, OID_AUTO, disabled, CTLFLAG_RDTUN | CTLFLAG_NOFETCH,
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&numa_disabled, 0, "NUMA-awareness in the allocators is disabled");
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#endif
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int __read_mostly vm_ndomains = 1;
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@ -627,15 +633,14 @@ vm_phys_register_domains(int ndomains, struct mem_affinity *affinity,
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int *locality)
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{
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#ifdef NUMA
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int d, i;
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int i;
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/*
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* For now the only override value that we support is 1, which
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* effectively disables NUMA-awareness in the allocators.
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*/
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d = 0;
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TUNABLE_INT_FETCH("vm.numa.disabled", &d);
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if (d)
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TUNABLE_INT_FETCH("vm.numa.disabled", &numa_disabled);
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if (numa_disabled)
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ndomains = 1;
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if (ndomains > 1) {
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