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Subject[PATCH] 5/7 Fix kirq_balance up so I can disable it.
At the moment, there are two different switches used, irqbalance_disabled
and no_balance_irq ... each of which switches half the code off. This
patch harmonises them into one (irqbalance_disable), and uses the old
subarch stuff as a default value so that this is auto-disabled on boxes
like NUMA-Q that can't cope with it.

Also renamed no_balance_irq to NO_BALANCE_IRQ as it's really a static
defined number now, not pretending to be a switch variable any more.
Now off by default for NUMA-Q, on by default for others, but can be
disabled with the boot time flag if people desire.

diff -urpN -X /home/fletch/.diff.exclude 013-pcibus_to_cpumask/arch/i386/kernel/io_apic.c 014-no_kirq/arch/i386/kernel/io_apic.c
--- 013-pcibus_to_cpumask/arch/i386/kernel/io_apic.c Tue Feb 25 23:03:43 2003
+++ 014-no_kirq/arch/i386/kernel/io_apic.c Fri Feb 28 08:05:35 2003
@@ -223,7 +223,7 @@ static void set_ioapic_affinity (unsigne

extern unsigned long irq_affinity [NR_IRQS];
int __cacheline_aligned pending_irq_balance_apicid [NR_IRQS];
-static int irqbalance_disabled __initdata = 0;
+static int irqbalance_disabled = NO_BALANCE_IRQ;
static int physical_balance = 0;

struct irq_cpu_info {
@@ -492,7 +492,7 @@ static inline void balance_irq (int cpu,
unsigned long allowed_mask;
unsigned int new_cpu;

- if (no_balance_irq)
+ if (irqbalance_disabled)
return;

allowed_mask = cpu_online_map & irq_affinity[irq];
diff -urpN -X /home/fletch/.diff.exclude 013-pcibus_to_cpumask/include/asm-i386/mach-bigsmp/mach_apic.h 014-no_kirq/include/asm-i386/mach-bigsmp/mach_apic.h
--- 013-pcibus_to_cpumask/include/asm-i386/mach-bigsmp/mach_apic.h Fri Feb 28 08:05:34 2003
+++ 014-no_kirq/include/asm-i386/mach-bigsmp/mach_apic.h Fri Feb 28 08:05:35 2003
@@ -10,7 +10,7 @@
((phys_apic) & (~0xf)) )
#endif

-#define no_balance_irq (1)
+#define NO_BALANCE_IRQ (1)
#define esr_disable (1)

static inline int apic_id_registered(void)
diff -urpN -X /home/fletch/.diff.exclude 013-pcibus_to_cpumask/include/asm-i386/mach-default/mach_apic.h 014-no_kirq/include/asm-i386/mach-default/mach_apic.h
--- 013-pcibus_to_cpumask/include/asm-i386/mach-default/mach_apic.h Fri Feb 28 08:05:34 2003
+++ 014-no_kirq/include/asm-i386/mach-default/mach_apic.h Fri Feb 28 08:05:35 2003
@@ -9,7 +9,7 @@
#define TARGET_CPUS 0x01
#endif

-#define no_balance_irq (0)
+#define NO_BALANCE_IRQ (0)
#define esr_disable (0)

#define INT_DELIVERY_MODE dest_LowestPrio
diff -urpN -X /home/fletch/.diff.exclude 013-pcibus_to_cpumask/include/asm-i386/mach-numaq/mach_apic.h 014-no_kirq/include/asm-i386/mach-numaq/mach_apic.h
--- 013-pcibus_to_cpumask/include/asm-i386/mach-numaq/mach_apic.h Fri Feb 28 08:05:34 2003
+++ 014-no_kirq/include/asm-i386/mach-numaq/mach_apic.h Fri Feb 28 08:05:35 2003
@@ -5,7 +5,7 @@

#define TARGET_CPUS (0xf)

-#define no_balance_irq (1)
+#define NO_BALANCE_IRQ (1)
#define esr_disable (1)

#define INT_DELIVERY_MODE dest_LowestPrio
diff -urpN -X /home/fletch/.diff.exclude 013-pcibus_to_cpumask/include/asm-i386/mach-summit/mach_apic.h 014-no_kirq/include/asm-i386/mach-summit/mach_apic.h
--- 013-pcibus_to_cpumask/include/asm-i386/mach-summit/mach_apic.h Fri Feb 28 08:05:34 2003
+++ 014-no_kirq/include/asm-i386/mach-summit/mach_apic.h Fri Feb 28 08:05:35 2003
@@ -4,7 +4,7 @@
extern int x86_summit;

#define esr_disable (x86_summit ? 1 : 0)
-#define no_balance_irq (0)
+#define NO_BALANCE_IRQ (0)

#define XAPIC_DEST_CPUS_MASK 0x0Fu
#define XAPIC_DEST_CLUSTER_MASK 0xF0u

-
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