[Xen-changelog] [xen master] x86: use cpumask_any() in mask-to-APIC-ID conversions

[patchbot@xxxxxxx]

commit 105ee865be224999e301b4303c740c1143b67b1d
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Aug 23 15:04:17 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Aug 23 15:04:17 2013 +0200

    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 <jbeulich@xxxxxxxx>
    Acked-by: Keir Fraser <keir@xxxxxxx>
---
 xen/arch/x86/genapic/delivery.c |    2 +-
 xen/arch/x86/genapic/x2apic.c   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/genapic/delivery.c b/xen/arch/x86/genapic/delivery.c
index cdab333..94eb857 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 d4c9149..b2cab03 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);
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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