kernel irq balance code moves IRQs around without checking whether
they are movable or not. Add those checks.
Signed-off-by: Venkatesh Pallipadi <[EMAIL PROTECTED]>
Index: linux-2.6.21-tolkml/arch/i386/kernel/io_apic.c
===================================================================
--- linux-2.6.21-tolkml.orig/arch/i386/kernel/io_apic.c 2007-04-25
20:08:32.000000000 -0700
+++ linux-2.6.21-tolkml/arch/i386/kernel/io_apic.c 2007-05-07
09:54:50.000000000 -0700
@@ -446,7 +446,7 @@
Dprintk("Rotating IRQs among CPUs.\n");
for_each_online_cpu(i) {
for (j = 0; j < NR_IRQS; j++) {
- if (!irq_desc[j].action)
+ if (!irq_desc[j].action || irq_balancing_disabled(j))
continue;
/* Is it a significant load ? */
if (IRQ_DELTA(CPU_TO_PACKAGEINDEX(i),j) <
@@ -582,7 +582,7 @@
selected_irq = -1;
for (j = 0; j < NR_IRQS; j++) {
/* Is this an active IRQ? */
- if (!irq_desc[j].action)
+ if (!irq_desc[j].action || irq_balancing_disabled(j))
continue;
if (imbalance <= IRQ_DELTA(max_loaded,j))
continue;
@@ -665,6 +665,9 @@
/* push everything to CPU 0 to give us a starting point. */
for (i = 0 ; i < NR_IRQS ; i++) {
+ if (irq_balancing_disabled(i))
+ continue;
+
irq_desc[i].pending_mask = cpumask_of_cpu(0);
set_pending_irq(i, cpumask_of_cpu(0));
}
-
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