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| author | Li RongQing <lirongqing@baidu.com> | 2024-04-10 11:01:14 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-04-10 06:55:31 +0200 |
| commit | e0a9ac192fd62322b932c6018db60217b3ad866d (patch) | |
| tree | 6fba8d76466bdc8f1458460be3c6feb1df992524 /arch/x86/kernel/smpboot.c | |
| parent | 7911f145de5fecbee1d67f27f73bec12f0fbc472 (diff) | |
| download | lwn-e0a9ac192fd62322b932c6018db60217b3ad866d.tar.gz lwn-e0a9ac192fd62322b932c6018db60217b3ad866d.zip | |
x86/cpu: Take NUMA node into account when allocating per-CPU cpumasks
per-CPU cpumasks are dominantly accessed from their own local CPUs,
so allocate them node-local to improve performance.
[ mingo: Rewrote the changelog. ]
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240410030114.6201-1-lirongqing@baidu.com
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 76bb65045c64..536dad144036 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1033,7 +1033,7 @@ static __init void disable_smp(void) void __init smp_prepare_cpus_common(void) { - unsigned int i; + unsigned int i, n; /* Mark all except the boot CPU as hotpluggable */ for_each_possible_cpu(i) { @@ -1042,11 +1042,12 @@ void __init smp_prepare_cpus_common(void) } for_each_possible_cpu(i) { - zalloc_cpumask_var(&per_cpu(cpu_sibling_map, i), GFP_KERNEL); - zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL); - zalloc_cpumask_var(&per_cpu(cpu_die_map, i), GFP_KERNEL); - zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL); - zalloc_cpumask_var(&per_cpu(cpu_l2c_shared_map, i), GFP_KERNEL); + n = cpu_to_node(i); + zalloc_cpumask_var_node(&per_cpu(cpu_sibling_map, i), GFP_KERNEL, n); + zalloc_cpumask_var_node(&per_cpu(cpu_core_map, i), GFP_KERNEL, n); + zalloc_cpumask_var_node(&per_cpu(cpu_die_map, i), GFP_KERNEL, n); + zalloc_cpumask_var_node(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL, n); + zalloc_cpumask_var_node(&per_cpu(cpu_l2c_shared_map, i), GFP_KERNEL, n); } set_cpu_sibling_map(0); |