linux-kernel - Re: [PATCH v3] lockdep: Allow tuning tracing capacity constants.

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Message-ID: <1778f2e5-0a0c-2c6e-2c83-fe51d938e8a2@i-love.sakura.ne.jp>
Date:   Wed, 18 Nov 2020 23:30:05 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Dmitry Vyukov <dvyukov@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v3] lockdep: Allow tuning tracing capacity constants.

The problem is that we can't know what exactly is consuming these resources.
My question is do you have a plan to make it possible to know what exactly is
consuming these resources.

On 2020/11/18 23:23, Peter Zijlstra wrote:
> On Wed, Nov 18, 2020 at 10:57:08PM +0900, Tetsuo Handa wrote:
>> Peter, do you have a plan to make this problem actionable?
> 
> I don't even know what the problem is.. nor do you. You can keep sending
> this bad paper-over-issues patch until you're blue in the face, I'll not
> take it for reasons I've explained before.
> 
> I've also previously said that the right way to go about this is to
> figure out what exactly is consuming these resources and then figure out
> how to cure _that_. Blindly increasing the number only enables bad
> actors to get away with being bad.
>