linux-kernel - Re: [PATCH v2] x86/nmi: Add an emergency handler in nmi_desc & use it in nmi_shootdown

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Message-ID: <87h67jsif0.ffs@tglx>
Date: Wed, 04 Dec 2024 14:10:27 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Waiman Long <longman@...hat.com>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Peter Zijlstra <peterz@...radead.org>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, "H. Peter Anvin"
 <hpa@...or.com>, Waiman Long <longman@...hat.com>
Subject: Re: [PATCH v2] x86/nmi: Add an emergency handler in nmi_desc & use
 it in nmi_shootdown_cpus()

On Tue, Dec 03 2024 at 10:07, Waiman Long wrote:
> +	/*
> +	 * Call the emergency handler first, if set
> +	 * Emergency handler is not traced or checked by nmi_check_duration().
> +	 */
> +	ehandler = READ_ONCE(desc->emerg_handler);
> +	if (ehandler)
> +		handled = ehandler(type, regs);

Shouldn't this just stop processing right here?

Thanks,

        tglx