Messages in this thread Patch in this message | | | Date | Tue, 13 Oct 2009 11:39:49 +0900 | From | Tejun Heo <> | Subject | Re: bisect results of MSI-X related panic (help!) |
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Brandeburg, Jesse wrote: > On Mon, 12 Oct 2009, Tejun Heo wrote: >>> any other debugging tricks/ideas? >> Hmm... stackprotector adds considerable amount of stack usage and it >> could be you're seeing stack overflow which would also explain the >> random crashes you've been seeing. Do you have DEBUG_STACKOVERFLOW >> turned on? This is on x86_64, right? > > Hi, thanks for your response, > > [root@jbrandeb-hc linux-2.6.32-rc1]# grep STACKO .config > CONFIG_DEBUG_STACKOVERFLOW=y > > [root@jbrandeb-hc linux-2.6.32-rc1]# grep X86_64 .config > CONFIG_X86_64=y > CONFIG_X86_64_SMP=y > CONFIG_X86_64_ACPI_NUMA=y > > stack size is 8K > > I tried Jarek's suggestion of CPUMASK_OFFSTACK and still panic. > [66027.266057] Kernel panic - not syncing: stack-protector: Kernel stack > is corrupted in: ffffffff810b4eb0 > [66027.266059] > [66027.266070] Kernel panic - not syncing: stack-protector: Kernel stack > is corrupted in: ffffffff81472856 > [66027.266071] > [66027.266081] Pid: 0, comm: swapper Tainted: G W > 2.6.32-rc2-git-debug #6 > [66027.266086] Call Trace: > > that was all I got. Interesting double fault, that hadn't happened > before. > > the symbols might be off slightly since I rebuilt the kernel, but this was > initial poke at offsets above in gdb > (gdb) l *0xffffffff810b4eb0 > 0xffffffff810b4eb0 is in dynamic_irq_cleanup (kernel/irq/chip.c:86). > 81 desc->handle_irq = handle_bad_irq; > 82 desc->chip = &no_irq_chip; > 83 desc->name = NULL; > 84 clear_kstat_irqs(desc); > 85 spin_unlock_irqrestore(&desc->lock, flags); > 86 }
Can you please apply the following patch and try to retrigger the panic?
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index c166019..f5a1482 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -63,6 +63,9 @@ void dynamic_irq_cleanup(unsigned int irq) struct irq_desc *desc = irq_to_desc(irq); unsigned long flags;
+ printk("XXX dynamic_irq_cleanup() called on %u\n", irq); + dump_stack(); + if (!desc) { WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq); return; -- tejun
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