---- Changes in v4: - select GENERIC_IRQ_MIGRATION when config GENERIC_IRQ_MIGRATION is enabled - add move_irqs() into kerne/irq/migration.c for cpu hotplug - use move_irqs() to migrate interrupts on arm/arm64 when cpu is going to down - split bugfix patch into seperate patches for arm and arm64
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. Then add a generic function for migrating interrupts in migration.c. And then use the function when cpu is going to down on arm and arm64. Yang Yingliang (4): genirq: introduce CONFIG_GENERIC_IRQ_MIGRATION genirq: add move_irqs() for cpu hotplug arm64: fix a migrating irq bug when hotplug cpu arm: fix a migrating irq bug when hotplug cpu arch/arm/Kconfig | 1 + arch/arm/include/asm/irq.h | 1 - arch/arm/kernel/irq.c | 62 ---------------------------------------- arch/arm/kernel/smp.c | 2 +- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/irq.h | 1 - arch/arm64/kernel/irq.c | 62 ---------------------------------------- arch/arm64/kernel/smp.c | 2 +- include/linux/irq.h | 4 +++ kernel/irq/Kconfig | 5 ++++ kernel/irq/Makefile | 2 +- kernel/irq/migration.c | 68 ++++++++++++++++++++++++++++++++++++++++++++ 12 files changed, 82 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/
