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powerpc: use IRQF_NO_DEBUG for IPIs

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There is no need to use the lockup detector ("noirqdebug") for IPIs.
The ipistorm benchmark measures a ~10% improvement on high systems
when this flag is set.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210719130614.195886-1-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2021-07-19 15:06:14 +02:00 committed by Michael Ellerman
parent 59b2bc18b1
commit 17df41fec5
2 changed files with 3 additions and 2 deletions
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2
arch/powerpc/sysdev/xics/xics-common.c
View file

@ -132,7 +132,7 @@ static void xics_request_ipi(void)
* IPIs are marked IRQF_PERCPU. The handler was set in map.
*/
BUG_ON(request_irq(ipi, icp_ops->ipi_action,
IRQF_PERCPU | IRQF_NO_THREAD, "IPI", NULL));
IRQF_NO_DEBUG | IRQF_PERCPU | IRQF_NO_THREAD, "IPI", NULL));
}
void __init xics_smp_probe(void)

3
arch/powerpc/sysdev/xive/common.c
View file

@ -1149,7 +1149,8 @@ static int __init xive_request_ipi(void)
snprintf(xid->name, sizeof(xid->name), "IPI-%d", node);
ret = request_irq(xid->irq, xive_muxed_ipi_action,
IRQF_PERCPU | IRQF_NO_THREAD, xid->name, NULL);
IRQF_NO_DEBUG | IRQF_PERCPU | IRQF_NO_THREAD,
xid->name, NULL);
WARN(ret < 0, "Failed to request IPI %d: %d\n", xid->irq, ret);
}