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Date:   Mon, 12 Dec 2022 11:51:51 +0100
From:   Thomas Gleixner <>
To:     Steven Rostedt <>
Cc:     "Paul E. McKenney" <>,,
        Masami Hiramatsu <>,
        Andrew Morton <>,
        Karol Herbst <>,
        Pekka Paalanen <>,
        Dave Hansen <>,
        Andy Lutomirski <>,
        Peter Zijlstra <>,
        Ingo Molnar <>, Borislav Petkov <>
Subject: Re: [for-next][PATCH 13/25] x86/mm/kmmio: Use

On Sat, Dec 10 2022 at 18:55, Steven Rostedt wrote:
> On Sun, 11 Dec 2022 00:30:36 +0100
> Thomas Gleixner <> wrote:
>> I concede that there are hot paths which actually can benefit, but this
>> code has exactly _ZERO_ benefit from that. Taking that tracing exception
>> and handling it is orders of magnitudes more expensive than a regular
>> preempt_enable().
>> So just get rid of it and don't proliferate cargo cult programming.
> The point of the patch is to just fix the lockdep issue. I'm happy to
> remove that "no_resched" (I was planning to), but that would be a separate
> change, with a different purpose, and thus a separate patch.

Right, but please make that part of the series.



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