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Subject[PATCH] x86, UV: Fix target_cpus() in x2apic_uv_x.c
target_cpu() should initially target all cpus, not just cpu 0.
Otherwise systems with lots of disks can exhaust the interrupt
vectors on cpu 0 if a large number of disks are discovered before
the irq balancer is running.

Note: UV code only...


Signed-off-by: Jack Steiner <steiner@sgi.com>

---
arch/x86/kernel/apic/x2apic_uv_x.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

Index: linux/arch/x86/kernel/apic/x2apic_uv_x.c
===================================================================
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c 2010-03-11 01:59:36.000000000 -0600
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c 2010-03-11 12:16:28.000000000 -0600
@@ -120,11 +120,9 @@ EXPORT_SYMBOL_GPL(uv_possible_blades);
unsigned long sn_rtc_cycles_per_second;
EXPORT_SYMBOL(sn_rtc_cycles_per_second);

-/* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */
-
static const struct cpumask *uv_target_cpus(void)
{
- return cpumask_of(0);
+ return cpu_online_mask;
}

static void uv_vector_allocation_domain(int cpu, struct cpumask *retmask)

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