---- Changes in v3: - introduce config GENERIC_IRQ_MIGRATION for compiling migration.c - rename migrate_irqs in arch/ia64/kernel/irq.c to avoid compiling error
Changes in v2: - use the exiting helper to set IRQD_MOVE_PCNTXT flag - use for_each_active_irq() instead of for_each_irq_desc() - add some warn messages when affinity is null or do set affinity failed ---- Hi All, There is a bug: When cpu is disabled, all irqs will be migratged to another cpu. In some cases, a new affinity is different, it needed to be coppied to irq's affinity. But if the type of irq is LPI, it's affinity will not be coppied because of irq_set_affinity's return value. As Marc and Will suggested, I refactor the arm/arm64 migrating interrupts code and fix the migrating irq bug while cpu is offline. I'm trying let the core code do the migrating interrupts matter. kernel/irq/migration.c depends on CONFIG_GENERIC_PENDING_IRQ, so I introduce config GENERIC_IRQ_MIGRATION for compiling migration.c. On ia64, there is a migrate_irqs() in arch/ia64/kernel/irq.c, rename it to avoid compiling error. With the above preparation, move the migrating interrupts code into kernel/irq/migration.c and fix the bug by using irq_do_set_affinity(). Cc: Jiang Liu <jiang....@linux.intel.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Marc Zyngier <marc.zyng...@arm.com> Cc: Mark Rutland <mark.rutl...@arm.com> Cc: Will Deacon <will.dea...@arm.com> Cc: Russell King - ARM Linux <li...@arm.linux.org.uk> Cc: Hanjun Guo <hanjun....@linaro.org> Yang Yingliang (3): genirq: introduce CONFIG_GENERIC_IRQ_MIGRATION ia64: rename migrate_irqs() to avoid compiling error arm/arm64: fix a migrating irq bug when hotplug cpu arch/arc/Kconfig | 1 + arch/arm/Kconfig | 1 + arch/arm/include/asm/irq.h | 1 - arch/arm/kernel/irq.c | 62 ---------------------------------------- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/irq.h | 1 - arch/arm64/kernel/irq.c | 62 ---------------------------------------- arch/hexagon/Kconfig | 1 + arch/ia64/Kconfig | 1 + arch/ia64/kernel/irq.c | 4 +-- arch/tile/Kconfig | 1 + arch/x86/Kconfig | 1 + include/linux/irq.h | 4 +++ kernel/irq/Kconfig | 4 +++ kernel/irq/Makefile | 2 +- kernel/irq/migration.c | 68 ++++++++++++++++++++++++++++++++++++++++++++ 16 files changed, 86 insertions(+), 129 deletions(-) -- 2.5.0 -- 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/
