linux-kernel - Re: [PATCH] drivers: connector: cn_proc: allow limiting certain messages

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Message-Id: <23716871582044372@myt3-4825096bdc88.qloud-c.yandex.net>
Date:   Tue, 18 Feb 2020 19:46:12 +0300
From:   Evgeniy Polyakov <zbr@...emap.net>
To:     "Daniel Walker (danielwa)" <danielwa@...co.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drivers: connector: cn_proc: allow limiting certain messages

18.02.2020, 19:30, "Daniel Walker (danielwa)" <danielwa@...co.com>:

> It's multicast and essentially broadcast messages .. So everyone gets every
> message, and once it's on it's likely it won't be turned off. Given that, It seems
> appropriate that the system administrator has control of what messages if any
> are sent, and it should effect all listening for messages.
>
> I think I would agree with you if this was unicast, and each listener could tailor
> what messages they want to get. However, this interface isn't that, and it would
> be considerable work to convert to that.

Connector has message/channel ids, you can implement this rate limiting scheme per user/socket.

This is probably not required if given cn_proc usecase - is it some central authority
which needs or doesn't need some messages? If so, it can not be bad to have a central switch.

But I also heard that container management tools are using this, in this case disabling some
things globally will suddenly break them.