On Sat, Jul 04, 2015 at 01:19:30PM +0800, Jisheng Zhang wrote: > On Marvell Berlin SoCs, the cpu's local timer is shutdown when the cpu > goes to a deep idle state, then the timer framework will be notified to > use a broadcast timer instead. The broadcast timer uses dw-apb-ictl as > interrupt chip, this patch adds irq_set_affinity support so that the > going to deep idle state cpu can set the interrupt affinity of the > broadcast interrupt to avoid unnecessary wakeups and IPIs.
NAK to this patch. The real question is - if CPU0 is the CPU going offline, why is it still receiving _any_ interrupts - all interrupts should be migrated off it, including the chained interrupts. Sounds like there's a bug in the migration code which needs further investigation, rather than hacking around the problem by introducing lots of driver code. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- 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/
