Occasionally the kernel has bugs that result in no irq being found for
a given cpu vector. If we acknowledge the irq the system has a good
chance of continuing even though we dropped an irq message. If we
continue to simply print a message and not acknowledge the irq the
system is likely to become non-responsive shortly there after.
Signed-off-by: Eric W. Biederman <[email protected]>
---
arch/x86_64/kernel/irq.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/arch/x86_64/kernel/irq.c b/arch/x86_64/kernel/irq.c
index 0c06af6..648055a 100644
--- a/arch/x86_64/kernel/irq.c
+++ b/arch/x86_64/kernel/irq.c
@@ -120,9 +120,14 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
if (likely(irq < NR_IRQS))
generic_handle_irq(irq);
- else if (printk_ratelimit())
- printk(KERN_EMERG "%s: %d.%d No irq handler for vector\n",
- __func__, smp_processor_id(), vector);
+ else {
+ if (!disable_apic)
+ ack_APIC_irq();
+
+ if (printk_ratelimit())
+ printk(KERN_EMERG "%s: %d.%d No irq handler for vector\n",
+ __func__, smp_processor_id(), vector);
+ }
irq_exit();
--
1.4.4.1.g278f
-
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