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| author |   Valentin Schneider <vschneid@redhat.com> | 2023-01-20 20:24:34 -0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2023-02-07 18:20:00 -0800 |
| commit | 06ac01721f7d07da722abe0ec6f147b90bfc8c77 (patch) | |
| tree | ecbc16bf5d55d37ae244ef36f194ffaf4b283ef4 /include/linux/topology.h | |
| parent | sched/topology: Introduce sched_numa_hop_mask() (diff) | |
| download | wireguard-linux-06ac01721f7d07da722abe0ec6f147b90bfc8c77.tar.xz wireguard-linux-06ac01721f7d07da722abe0ec6f147b90bfc8c77.zip | |
sched/topology: Introduce for_each_numa_hop_mask()
The recently introduced sched_numa_hop_mask() exposes cpumasks of CPUs
reachable within a given distance budget, wrap the logic for iterating over
all (distance, mask) values inside an iterator macro.
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/topology.h')
| -rw-r--r-- | include/linux/topology.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/topology.h b/include/linux/topology.h index 344c2362755a..fea32377f7c7 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -261,4 +261,22 @@ sched_numa_hop_mask(unsigned int node, unsigned int hops) } #endif /* CONFIG_NUMA */ +/** + * for_each_numa_hop_mask - iterate over cpumasks of increasing NUMA distance + * from a given node. + * @mask: the iteration variable. + * @node: the NUMA node to start the search from. + * + * Requires rcu_lock to be held. + * + * Yields cpu_online_mask for @node == NUMA_NO_NODE. + */ +#define for_each_numa_hop_mask(mask, node) \ + for (unsigned int __hops = 0; \ + mask = (node != NUMA_NO_NODE || __hops) ? \ + sched_numa_hop_mask(node, __hops) : \ + cpu_online_mask, \ + !IS_ERR_OR_NULL(mask); \ + __hops++) + #endif /* _LINUX_TOPOLOGY_H */ |