[This is not really a PCI question, so +cc Thomas, LKML.]
On Mon, Mar 26, 2012 at 3:06 AM, Yevgeny Petrilin
<yevgenyp@xxxxxxxxxxxxxx> wrote:
> Hello,
>
> I'm working on an issue where affinity changes to IRQ only have effect after the first interrupt which still happens on the original core.
> I understand that the decision regarding it takes place in this code:
>
> if (irq_can_move_pcntxt(data)) {
> ret = chip->irq_set_affinity(data, mask, false);
> switch (ret) {
> case IRQ_SET_MASK_OK:
> cpumask_copy(data->affinity, mask);
> case IRQ_SET_MASK_OK_NOCOPY:
> irq_set_thread_affinity(desc);
> ret = 0;
> }
> } else {
> irqd_set_move_pending(data);
> irq_copy_pending(desc, mask);
> }
>
> Which means that the "IRQD_MOVE_PCNTXT" flag is not set in irq_data->state_use_accessors.
> I was able to add this flag using irq_modify_status(), which is probably not the way to go.
> This option also doesn't exist in older kernels (2.6.32)
>
> So the question is, when irq_desc is created, how is it determined that "IRQD_MOVE_PCNTXT" flag is set?
>
> Thanks,
> Yevgeny
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
