On Mon, May 4, 2015 at 6:15 AM, Jiang Liu <jiang....@linux.intel.com> wrote: > The field 'affinity' in irq_desc won't change once the irq_desc data > structure is created. So cache irq_desc->affinity instead of irq_desc. > This also helps to hide struct irq_desc from device drivers.
Hi Jiang, I might not understand the new changes irq core, but up until now affinity was changed when the user changed it through /proc/irq/<IRQ>/smp_affinity. This code is monitoring the affinity from the napi_poll context to detect affinity changes, and prevent napi from keep running on the wrong CPU. Therefore, the affinity can't be cached at the beginning. Please revert this caching. Thanks, Amir -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
