linux-kernel - Re: [PATCH v10 clocksource 1/7] clocksource: Provide module parameters to inject delays in watchdog

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Message-ID: <20210426175627.GZ1401198@tassilo.jf.intel.com>
Date:   Mon, 26 Apr 2021 10:56:27 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        john.stultz@...aro.org, sboyd@...nel.org, corbet@....net,
        Mark.Rutland@....com, maz@...nel.org, kernel-team@...com,
        neeraju@...eaurora.org, feng.tang@...el.com,
        zhengjun.xing@...el.com, Chris Mason <clm@...com>
Subject: Re: [PATCH v10 clocksource 1/7] clocksource: Provide module
 parameters to inject delays in watchdog

> ------------------------------------------------------------------------
> 
> - module parameters
> 
>   If the scope of the fault injection capability is limited to a
>   single kernel module, it is better to provide module parameters to
>   configure the fault attributes.
> 
> ------------------------------------------------------------------------
> 
> And in this case, the fault injection capability is in fact limited to
> kernel/clocksource.c.


I disagree with this recommendation because it prevents fuzzer coverage.

Much better to have an uniform interface that can be automatically
explored.

-Andi