linux-kernel - Re: [PATCH] fs/proc: introduce /proc/stat2 file

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Message-ID: <20181029203818.pot26ewxbncfrnua@linux-r8p5>
Date:   Mon, 29 Oct 2018 13:38:18 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Waiman Long <longman@...hat.com>
Cc:     akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH] fs/proc: introduce /proc/stat2 file

On Mon, 29 Oct 2018, Waiman Long wrote:

>BTW, since you are making stat2 compatible with stat, will that be
>easier from the user API perspective if we use a sysctl parameter to
>turn on and off IRQs reporting for /proc/stat, for example?

For one /proc/stat is also common for debugging envs (ie: performance)
and I fear that if a tunnable modifies the behavior of the output, we
it might never be usable again (at least not without having users also
now consider the systctl parameter). Making it dynamic I think is not
worth it.

Thanks,
Davidlohr