linux-kernel - Re: [patch 06/41] x86/traps: Simplify pagefault tracing logic

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Message-ID: <CALCETrU_Z003rNrbcH0XJE4a0eVF9SQLXjUn+2W7K-Jcx0XBXA@mail.gmail.com>
Date:   Fri, 25 Aug 2017 07:59:28 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>, Peter Anvin <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [patch 06/41] x86/traps: Simplify pagefault tracing logic

On Fri, Aug 25, 2017 at 3:31 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
> Make use of the new irqvector tracing static key and remove the duplicated
> trace_do_pagefault() implementation.
>
> If irq vector tracing is disabled, then the overhead of this is a single
> NOP5, which is a reasonable tradeoff to avoid duplicated code and the
> unholy macro mess.

This is great.  Thanks!