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x86/irq: remove leftover code from NUMA_MIGRATE_IRQ_DESC

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The original feature of migrating irq_desc dynamic was too fragile
and was causing problems: it caused crashes on systems with lots of
cards with MSI-X when user-space irq-balancer was enabled.

We now have new patches that create irq_desc according to device
numa node. This patch removes the leftover bits of the dynamic balancer.

[ Impact: remove dead code ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49F654AF.8000808@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2009-04-27 17:58:23 -07:00
committed by Ingo Molnar
parent 9ec4fa271f
commit fcef5911c7
8 changed files with 9 additions and 93 deletions
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56
arch/x86/kernel/apic/io_apic.c
View File

@@ -148,9 +148,6 @@ struct irq_cfg {
unsigned move_cleanup_count;
u8 vector;
u8 move_in_progress : 1;
#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
u8 move_desc_pending : 1;
#endif
};
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
@@ -254,8 +251,7 @@ int arch_init_chip_data(struct irq_desc *desc, int cpu)
return 0;
}
#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
/* for move_irq_desc */
static void
init_copy_irq_2_pin(struct irq_cfg *old_cfg, struct irq_cfg *cfg, int cpu)
{
@@ -356,19 +352,7 @@ void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc)
old_desc->chip_data = NULL;
}
}
static void
set_extra_move_desc(struct irq_desc *desc, const struct cpumask *mask)
{
struct irq_cfg *cfg = desc->chip_data;
if (!cfg->move_in_progress) {
/* it means that domain is not changed */
if (!cpumask_intersects(desc->affinity, mask))
cfg->move_desc_pending = 1;
}
}
#endif
/* end for move_irq_desc */
#else
static struct irq_cfg *irq_cfg(unsigned int irq)
@@ -378,13 +362,6 @@ static struct irq_cfg *irq_cfg(unsigned int irq)
#endif
#ifndef CONFIG_NUMA_MIGRATE_IRQ_DESC
static inline void
set_extra_move_desc(struct irq_desc *desc, const struct cpumask *mask)
{
}
#endif
struct io_apic {
unsigned int index;
unsigned int unused[3];
@@ -592,9 +569,6 @@ set_desc_affinity(struct irq_desc *desc, const struct cpumask *mask)
if (assign_irq_vector(irq, cfg, mask))
return BAD_APICID;
/* check that before desc->addinity get updated */
set_extra_move_desc(desc, mask);
cpumask_copy(desc->affinity, mask);
return apic->cpu_mask_to_apicid_and(desc->affinity, cfg->domain);
@@ -2393,8 +2367,6 @@ migrate_ioapic_irq_desc(struct irq_desc *desc, const struct cpumask *mask)
if (assign_irq_vector(irq, cfg, mask))
return;
set_extra_move_desc(desc, mask);
dest = apic->cpu_mask_to_apicid_and(cfg->domain, mask);
irte.vector = cfg->vector;
@@ -2491,34 +2463,14 @@ static void irq_complete_move(struct irq_desc **descp)
struct irq_cfg *cfg = desc->chip_data;
unsigned vector, me;
if (likely(!cfg->move_in_progress)) {
#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
if (likely(!cfg->move_desc_pending))
return;
/* domain has not changed, but affinity did */
me = smp_processor_id();
if (cpumask_test_cpu(me, desc->affinity)) {
*descp = desc = move_irq_desc(desc, me);
/* get the new one */
cfg = desc->chip_data;
cfg->move_desc_pending = 0;
}
#endif
if (likely(!cfg->move_in_progress))
return;
}
vector = ~get_irq_regs()->orig_ax;
me = smp_processor_id();
if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) {
#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
*descp = desc = move_irq_desc(desc, me);
/* get the new one */
cfg = desc->chip_data;
#endif
if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
send_cleanup_vector(cfg);
}
}
#else
static inline void irq_complete_move(struct irq_desc **descp) {}