linux-kernel - Re: question about the limited interrupt vector resource on a single cpu

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Date:   Wed, 6 Jun 2018 11:15:31 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Pingfan Liu <kernelfans@...il.com>
cc:     x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: question about the limited interrupt vector resource on a single
 cpu

On Wed, 6 Jun 2018, Pingfan Liu wrote:

> For x86, there is around 200 vectors left for external device on a
> single logic cpu.
>
> Is there any case that we exhaust them in real world, and is it worth to fix?

Exhaustion is unlikely, but how would you fix it? The vector space per CPU
is limited by hardware not software.

Thanks,

	tglx