linux-kernel - Re: [PATCH] Doc: lockdep: add information about performance impact

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Message-ID: <20181009154359.GB5728@hirez.programming.kicks-ass.net>
Date:   Tue, 9 Oct 2018 17:43:59 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Lukasz Luba <l.luba@...tner.samsung.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        b.zolnierkie@...sung.com, mingo@...hat.com, will.deacon@....com,
        corbet@....net
Subject: Re: [PATCH] Doc: lockdep: add information about performance impact

On Tue, Oct 09, 2018 at 05:39:27PM +0200, Lukasz Luba wrote:
> This patch add some warning related to performance drop.
> It should be mentioned that this is not for free
> and the platfrom resources (cache, bus interconnect, etc.)
> will be used more frequently.

To me this reads a bit like: water is wet.

Is this really needed?