linux-kernel - Re: [PATCH v5 3/3] Documentation/admin-guide: Change doc for split_lock

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Message-ID: <87y2ei4yj1.fsf@nanos.tec.linutronix.de>
Date:   Fri, 19 Mar 2021 22:35:46 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Fenghua Yu <fenghua.yu@...el.com>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Tony Luck <tony.luck@...el.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Xiaoyao Li <xiaoyao.li@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>,
        Fenghua Yu <fenghua.yu@...el.com>
Subject: Re: [PATCH v5 3/3] Documentation/admin-guide: Change doc for split_lock_detect parameter

On Sat, Mar 13 2021 at 05:49, Fenghua Yu wrote:
> +			ratelimit:N -
> +				  Set rate limit to N bus locks per second
> +				  for bus lock detection. 0 < N.
> +				  Only applied to non-root users.

Of course this does not mention that the limit is per UID and it neither
tells what the action is to rate limit the bus lock attempts. The rate
limit saturation which is induced by msleep() is not mentioned either.

Really useful for administrators.

Thanks,

        tglx