setting irq affinity failed using proc interface when cpu numbers exceeds 32

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haibinzhang
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Joined: 2018/06/08 09:19:43

setting irq affinity failed using proc interface when cpu numbers exceeds 32

Post by haibinzhang » 2018/06/08 09:29:28

I have a centos7.4 Virtual Machine with 80 vcpu, and kernel is 3.10.0-862.3.2. I failed to move irq affinity to specific cpu using /proc/irq/xx/smp_affinity, __assign_irq_vector() returns ENOSPC, there had no enough irq vector. The kernel is different from the upstream, so what can I do?

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