On Fri, Oct 3, 2014 at 3:20 PM, Gilles Chanteperdrix
<[email protected]> wrote:
> On Fri, Oct 03, 2014 at 11:35:33AM +0800, GP Orcullo wrote:
>> The system managed to dump some error messages.
>>
>
>> [ 407.688809] INFO: rcu_preempt detected stalls on CPUs/tasks: { 3}
>> (detected by 0, t=12002 jiffies, g=22447, c=22446, q=113448)
>> [ 407.694560] Task dump for CPU 3:
>> [ 407.697763] switchtest R running 0 3979 3640 0x00000002
>> [ 407.704111] [<c0453ddc>] (__schedule+0x1fc/0x5f8) from [<00000010>] (0x10)
>> [ 587.714458] INFO: rcu_preempt detected stalls on CPUs/tasks: { 3}
>> (detected by 2, t=48007 jiffies, g=22447, c=22446, q=443504)
>> [ 587.720205] Task dump for CPU 3:
>> [ 587.723407] switchtest R running 0 3979 3640 0x00000002
>> [ 587.729755] [<c0453ddc>] (__schedule+0x1fc/0x5f8) from [<00000010>] (0x10)
>> [ 767.740128] INFO: rcu_preempt detected stalls on CPUs/tasks: { 3}
>> (detected by 2, t=84012 jiffies, g=22447, c=22446, q=1136198)
>> [ 767.745964] Task dump for CPU 3:
>> [ 767.749167] switchtest R running 0 3979 3640 0x00000002
>> [ 767.755515] [<c0453ddc>] (__schedule+0x1fc/0x5f8) from [<00000010>] (0x10)
>> [ 782.763027] ------------[ cut here ]------------
>> [ 782.763099] WARNING: at include/linux/ipipe_domain.h:212
>> __ipipe_dispatch_irq+0x35c/0x5a0()
>> [ 782.770380] Modules linked in: nfsv3 nfsv4 nfsd exportfs nfs_acl
>> auth_rpcgss nfs lockd sunrpc vfat fat smsc95xx usbnet mii gpio_keys
>> [ 782.782218] [<c0015624>] (unwind_backtrace+0x0/0xf8) from [<c0026118>]
>> (warn_slowpath_common+0x4c/0x64)
>> [ 782.791606] [<c0026118>] (warn_slowpath_common+0x4c/0x64) from
>> [<c002614c>] (warn_slowpath_null+0x1c/0x24)
>> [ 782.801232] [<c002614c>] (warn_slowpath_null+0x1c/0x24) from [<c00886ac>]
>> (__ipipe_dispatch_irq+0x35c/0x5a0)
>> [ 782.811035] [<c00886ac>] (__ipipe_dispatch_irq+0x35c/0x5a0) from
>> [<c00200c8>] (combiner_handle_cascade_irq+0x80/0xf4)
>> [ 782.821620] [<c00200c8>] (combiner_handle_cascade_irq+0x80/0xf4) from
>> [<c0019110>] (__ipipe_ack_irq+0xc/0x10)
>
> This is bad, can I see the code of the "combiner_handle_cascade_irq" function?
>
> --
> Gilles.
Here's the original code:
static DEFINE_SPINLOCK(irq_controller_lock);
...
static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
{
struct combiner_chip_data *chip_data = irq_get_handler_data(irq);
struct irq_chip *chip = irq_get_chip(irq);
unsigned int cascade_irq, combiner_irq;
unsigned long status;
chained_irq_enter(chip, desc);
spin_lock(&irq_controller_lock);
status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
spin_unlock(&irq_controller_lock);
status &= chip_data->irq_mask;
if (status == 0)
goto out;
combiner_irq = __ffs(status);
cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
if (unlikely(cascade_irq >= NR_IRQS))
do_bad_IRQ(cascade_irq, desc);
else
ipipe_handle_demuxed_irq(cascade_irq);
out:
chained_irq_exit(chip, desc);
}
I've changed the DEFINE_SPINLOCK to IPIPE_DEFINE_SPINLOCK and I got
the same results.
Here's the link to the full code:
https://github.com/kinsamanka/linux-odroidu3/blob/odroid-3.8.y-xenomai/arch/arm/mach-exynos/common.c
Regards,
GP Orcullo
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