Messages in this thread | | | Subject | Re: [PATCH RFC 1/1] genirq: Make threaded handler use irq affinity for managed interrupt | From | John Garry <> | Date | Wed, 11 Dec 2019 09:41:05 +0000 |
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On 10/12/2019 18:32, Marc Zyngier wrote: >>>> The ITS code will make the lowest online CPU in the affinity mask >>>> the >>>> target CPU for the interrupt, which may result in some CPUs >>>> handling >>>> so many interrupts. >>> If what you want is for the*default* affinity to be spread around, >>> that should be achieved pretty easily. Let me have a think about how >>> to do that. >> Cool, I anticipate that it should help my case. >> >> I can also seek out some NVMe cards to see how it would help a more >> "generic" scenario. > Can you give the following a go? It probably has all kind of warts on > top of the quality debug information, but I managed to get my D05 and > a couple of guests to boot with it. It will probably eat your data, > so use caution!;-) >
Hi Marc,
Ok, we'll give it a spin.
Thanks, John
> Thanks, > > M. > > diff --git a/drivers/irqchip/irq-gic-v3-its.c > b/drivers/irqchip/irq-gic-v3-its.c > index e05673bcd52b..301ee3bc0602 100644 > --- a/drivers/irqchip/irq-gic-v3-its.c > +++ b/drivers/irqchip/irq-gic-v3-its.c > @@ -177,6 +177,8 @@ static DEFINE_IDA(its_vpeid_ida);
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