AcoSail/kernel_optimize_test
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genirq: Move initial affinity setup to irq_startup()

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The startup vs. setaffinity ordering of interrupts depends on the
IRQF_NOAUTOEN flag. Chained interrupts are not getting any affinity
assignment at all.

A regular interrupt is started up and then the affinity is set. A
IRQF_NOAUTOEN marked interrupt is not started up, but the affinity is set
nevertheless.

Move the affinity setup to startup_irq() so the ordering is always the same
and chained interrupts get the proper default affinity assigned as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235445.020534783@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-06-20 01:37:23 +02:00
parent 43564bd97d
commit 2e051552df
2 changed files with 8 additions and 9 deletions
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2
kernel/irq/chip.c
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@ -213,6 +213,8 @@ int irq_startup(struct irq_desc *desc, bool resend)
irq_enable(desc);
}
irq_state_set_started(desc);
/* Set default affinity mask once everything is setup */
irq_setup_affinity(desc);
}
if (resend)

15
kernel/irq/manage.c
View File

@ -1327,6 +1327,12 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
if (new->flags & IRQF_ONESHOT)
desc->istate |= IRQS_ONESHOT;
/* Exclude IRQ from balancing if requested */
if (new->flags & IRQF_NOBALANCING) {
irq_settings_set_no_balancing(desc);
irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
}
if (irq_settings_can_autoenable(desc)) {
irq_startup(desc, true);
} else {
@ -1341,15 +1347,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
desc->depth = 1;
}
/* Exclude IRQ from balancing if requested */
if (new->flags & IRQF_NOBALANCING) {
irq_settings_set_no_balancing(desc);
irqd_set(&desc->irq_data, IRQD_NO_BALANCING);
}
/* Set default affinity mask once everything is setup */
irq_setup_affinity(desc);
} else if (new->flags & IRQF_TRIGGER_MASK) {
unsigned int nmsk = new->flags & IRQF_TRIGGER_MASK;
unsigned int omsk = irqd_get_trigger_type(&desc->irq_data);