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Date: Fri, 8 May 2015 11:04:39 +0800
From: "Yun Wu (Abel)" <wuyun.wu@...wei.com>
To: Jiang Liu <jiang.liu@...ux.intel.com>
CC: Thomas Gleixner <tglx@...utronix.de>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Randy Dunlap <rdunlap@...radead.org>,
Yinghai Lu <yinghai@...nel.org>,
Borislav Petkov <bp@...en8.de>, <x86@...nel.org>,
"Jason Cooper" <jason@...edaemon.net>,
Grant Likely <grant.likely@...aro.org>,
"Kevin Cernekee" <cernekee@...il.com>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
Tony Luck <tony.luck@...el.com>,
<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
<linux-acpi@...r.kernel.org>, <linux-sh@...r.kernel.org>
Subject: Re: [RFC v1 02/11] genirq: Move field 'node' from struct irq_data
into struct irq_common_data
On 2015/5/8 10:29, Yun Wu (Abel) wrote:
> Hi Gerry,
> On 2015/5/4 11:15, Jiang Liu wrote:
>
>> NUMA node information is per-irq instead of per-irqchip, so move it into
>> struct irq_common_data.
>>
>> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
>> ---
>> arch/sh/kernel/irq.c | 2 +-
>> arch/x86/kernel/apic/vector.c | 8 ++++----
>> arch/x86/platform/uv/uv_irq.c | 2 +-
>> include/linux/irq.h | 20 ++++++++++++++++++--
>> kernel/irq/internals.h | 5 +++++
>> kernel/irq/irqdesc.c | 10 ++--------
>> kernel/irq/irqdomain.c | 4 ++--
>> kernel/irq/manage.c | 2 +-
>> kernel/irq/proc.c | 2 +-
>> 9 files changed, 35 insertions(+), 20 deletions(-)
>>
>> diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
>> index eb10ff84015c..8dc677cc136b 100644
>> --- a/arch/sh/kernel/irq.c
>> +++ b/arch/sh/kernel/irq.c
>> @@ -227,7 +227,7 @@ void migrate_irqs(void)
>> for_each_active_irq(irq) {
>> struct irq_data *data = irq_get_irq_data(irq);
>>
>> - if (data->node == cpu) {
>> + if (irq_data_get_node(data) == cpu) {
>> unsigned int newcpu = cpumask_any_and(data->affinity,
>> cpu_online_mask);
>> if (newcpu >= nr_cpu_ids) {
>> diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
>> index 96ce5068a926..983bea2a09ce 100644
>> --- a/arch/x86/kernel/apic/vector.c
>> +++ b/arch/x86/kernel/apic/vector.c
>> @@ -345,7 +345,7 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
>> struct irq_alloc_info *info = arg;
>> struct apic_chip_data *data;
>> struct irq_data *irq_data;
>> - int i, err;
>> + int i, err, node;
>>
>> if (disable_apic)
>> return -ENXIO;
>> @@ -357,12 +357,13 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
>> for (i = 0; i < nr_irqs; i++) {
>> irq_data = irq_domain_get_irq_data(domain, virq + i);
>> BUG_ON(!irq_data);
>> + node = irq_data_get_node(irq_data);
>> #ifdef CONFIG_X86_IO_APIC
>> if (virq + i < nr_legacy_irqs() && legacy_irq_data[virq + i])
>> data = legacy_irq_data[virq + i];
>> else
>> #endif
>> - data = alloc_apic_chip_data(irq_data->node);
>> + data = alloc_apic_chip_data(node);
>> if (!data) {
>> err = -ENOMEM;
>> goto error;
>> @@ -371,8 +372,7 @@ static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq,
>> irq_data->chip = &lapic_controller;
>> irq_data->chip_data = data;
>> irq_data->hwirq = virq + i;
>> - err = assign_irq_vector_policy(virq, irq_data->node, data,
>> - info);
>> + err = assign_irq_vector_policy(virq, node, data, info);
>> if (err)
>> goto error;
>> }
>> diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c
>> index cdf86cd3fd97..bc992b7b041f 100644
>> --- a/arch/x86/platform/uv/uv_irq.c
>> +++ b/arch/x86/platform/uv/uv_irq.c
>> @@ -89,7 +89,7 @@ static int uv_domain_alloc(struct irq_domain *domain, unsigned int virq,
>> return -EINVAL;
>>
>> chip_data = kmalloc_node(sizeof(*chip_data), GFP_KERNEL,
>> - irq_data->node);
>> + irq_data_get_node(irq_data));
>> if (!chip_data)
>> return -ENOMEM;
>>
>> diff --git a/include/linux/irq.h b/include/linux/irq.h
>> index 3b6e0def7f5c..3f999a0af713 100644
>> --- a/include/linux/irq.h
>> +++ b/include/linux/irq.h
>> @@ -129,9 +129,13 @@ struct irq_domain;
>> * struct irq_common_data - per irq data shared by all irqchips
>> * @state_use_accessors: status information for irq chip functions.
>> * Use accessor functions to deal with it
>> + * @node: node index useful for balancing
>> */
>> struct irq_common_data {
>> unsigned int state_use_accessors;
>> +#ifdef CONFIG_SMP
>
> Would CONFIG_NUMA be a little more appropriate?
> Or even let @node be always compiled?
Sorry for comment before reading your next patch in which you replaced
CONFIG_SMP with CONFIG_NUMA.
And letting @node be under CONFIG_NUMA makes sense, because it's useless
in non-NUMA scenario.
Thanks,
Abel
>
>
>> + unsigned int node;
>> +#endif
>> };
>>
>> /**
>> @@ -139,7 +143,6 @@ struct irq_common_data {
>> * @mask: precomputed bitmask for accessing the chip registers
>> * @irq: interrupt number
>> * @hwirq: hardware interrupt number, local to the interrupt domain
>> - * @node: node index useful for balancing
>> * @common: point to data shared by all irqchips
>> * @chip: low level interrupt hardware access
>> * @domain: Interrupt translation domain; responsible for mapping
>> @@ -160,7 +163,6 @@ struct irq_data {
>> u32 mask;
>> unsigned int irq;
>> unsigned long hwirq;
>> - unsigned int node;
>> struct irq_common_data *common;
>> struct irq_chip *chip;
>> struct irq_domain *domain;
>> @@ -634,6 +636,20 @@ static inline u32 irq_get_trigger_type(unsigned int irq)
>> return d ? irqd_get_trigger_type(d) : 0;
>> }
>>
>> +static inline int irq_common_data_get_node(struct irq_common_data *d)
>> +{
>> +#ifdef CONFIG_SMP
>> + return d->node;
>> +#else
>> + return 0;
>> +#endif
>> +}
>> +
>> +static inline int irq_data_get_node(struct irq_data *d)
>> +{
>> + return irq_common_data_get_node(d->common);
>> +}
>> +
>> unsigned int arch_dynirq_lower_bound(unsigned int from);
>>
>> int __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,
>> diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
>> index ed84299788b3..d82a77d39aeb 100644
>> --- a/kernel/irq/internals.h
>> +++ b/kernel/irq/internals.h
>> @@ -199,6 +199,11 @@ static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *d
>> __this_cpu_inc(kstat.irqs_sum);
>> }
>>
>> +static inline int irq_desc_get_node(struct irq_desc *desc)
>> +{
>> + return irq_common_data_get_node(&desc->irq_common_data);
>> +}
>> +
>> #ifdef CONFIG_PM_SLEEP
>> bool irq_pm_check_wakeup(struct irq_desc *desc);
>> void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
>> diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
>> index eac1aac906ea..20773f073e24 100644
>> --- a/kernel/irq/irqdesc.c
>> +++ b/kernel/irq/irqdesc.c
>> @@ -52,23 +52,17 @@ static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
>>
>> static void desc_smp_init(struct irq_desc *desc, int node)
>> {
>> - desc->irq_data.node = node;
>> + desc->irq_common_data.node = node;
>> cpumask_copy(desc->irq_data.affinity, irq_default_affinity);
>> #ifdef CONFIG_GENERIC_PENDING_IRQ
>> cpumask_clear(desc->pending_mask);
>> #endif
>> }
>>
>> -static inline int desc_node(struct irq_desc *desc)
>> -{
>> - return desc->irq_data.node;
>> -}
>> -
>> #else
>> static inline int
>> alloc_masks(struct irq_desc *desc, gfp_t gfp, int node) { return 0; }
>> static inline void desc_smp_init(struct irq_desc *desc, int node) { }
>> -static inline int desc_node(struct irq_desc *desc) { return 0; }
>> #endif
>>
>> static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,
>> @@ -300,7 +294,7 @@ static void free_desc(unsigned int irq)
>> unsigned long flags;
>>
>> raw_spin_lock_irqsave(&desc->lock, flags);
>> - desc_set_defaults(irq, desc, desc_node(desc), NULL);
>> + desc_set_defaults(irq, desc, irq_desc_get_node(desc), NULL);
>> raw_spin_unlock_irqrestore(&desc->lock, flags);
>> }
>>
>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
>> index 3552b8750efd..93ef89059022 100644
>> --- a/kernel/irq/irqdomain.c
>> +++ b/kernel/irq/irqdomain.c
>> @@ -830,12 +830,12 @@ static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
>> {
>> struct irq_data *irq_data;
>>
>> - irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL, child->node);
>> + irq_data = kzalloc_node(sizeof(*irq_data), GFP_KERNEL,
>> + irq_data_get_node(child));
>> if (irq_data) {
>> child->parent_data = irq_data;
>> irq_data->irq = child->irq;
>> irq_data->common = child->common;
>> - irq_data->node = child->node;
>> irq_data->domain = domain;
>> }
>>
>> diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
>> index e68932bb308e..d206aa2c3378 100644
>> --- a/kernel/irq/manage.c
>> +++ b/kernel/irq/manage.c
>> @@ -332,7 +332,7 @@ static int
>> setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
>> {
>> struct cpumask *set = irq_default_affinity;
>> - int node = desc->irq_data.node;
>> + int node = irq_desc_get_node(desc);
>>
>> /* Excludes PER_CPU and NO_BALANCE interrupts */
>> if (!irq_can_set_affinity(irq))
>> diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
>> index df2f4642d1e7..0e97c142ce40 100644
>> --- a/kernel/irq/proc.c
>> +++ b/kernel/irq/proc.c
>> @@ -241,7 +241,7 @@ static int irq_node_proc_show(struct seq_file *m, void *v)
>> {
>> struct irq_desc *desc = irq_to_desc((long) m->private);
>>
>> - seq_printf(m, "%d\n", desc->irq_data.node);
>> + seq_printf(m, "%d\n", irq_desc_get_node(desc));
>> return 0;
>> }
>>
>
>
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