From: Jan Beulich Date: Fri, 23 Aug 2013 13:04:17 +0000 (+0200) Subject: x86: use cpumask_any() in mask-to-APIC-ID conversions X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~6466 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=105ee865be224999e301b4303c740c1143b67b1d;p=xen.git x86: use cpumask_any() in mask-to-APIC-ID conversions This is to avoid picking CPU0 for almost any such operation, resulting in very uneven distribution of interrupt load. Signed-off-by: Jan Beulich Acked-by: Keir Fraser --- diff --git a/xen/arch/x86/genapic/delivery.c b/xen/arch/x86/genapic/delivery.c index cdab3338af..94eb8572d6 100644 --- a/xen/arch/x86/genapic/delivery.c +++ b/xen/arch/x86/genapic/delivery.c @@ -67,5 +67,5 @@ const cpumask_t *vector_allocation_cpumask_phys(int cpu) unsigned int cpu_mask_to_apicid_phys(const cpumask_t *cpumask) { /* As we are using single CPU as destination, pick only one CPU here */ - return cpu_physical_id(cpumask_first(cpumask)); + return cpu_physical_id(cpumask_any(cpumask)); } diff --git a/xen/arch/x86/genapic/x2apic.c b/xen/arch/x86/genapic/x2apic.c index d4c91495ac..b2cab030ff 100644 --- a/xen/arch/x86/genapic/x2apic.c +++ b/xen/arch/x86/genapic/x2apic.c @@ -81,7 +81,7 @@ static const cpumask_t *vector_allocation_cpumask_x2apic_cluster(int cpu) static unsigned int cpu_mask_to_apicid_x2apic_cluster(const cpumask_t *cpumask) { - unsigned int cpu = cpumask_first(cpumask); + unsigned int cpu = cpumask_any(cpumask); unsigned int dest = per_cpu(cpu_2_logical_apicid, cpu); const cpumask_t *cluster_cpus = per_cpu(cluster_cpus, cpu);