Re: [PATCH] Introduce the pkill_on_warn boot parameter

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On 27.07.2022 19:42, Linus Torvalds wrote:
> On Wed, Jul 27, 2022 at 9:17 AM Alexey Khoroshilov
> <khoroshilov@xxxxxxxxx> wrote:
>> We see a number of cases where WARNING is used to inform userspace that
>> it is doing something wrong, e.g.
> That first case is entirely bogus.
> WARN_ON() should only be used for "This cannot happen, but if it does,
> I want to know how we got here".
> But the second case is fine: Using "pr_warn()" is fine. A kernel
> warning (without a backtrace) is a normal thing for something that is
> deprecated or questionable, and you want to tell the user that "this
> app is doing something wrong".

Agree with the only note that I like the requirement:

* Do not include "BUG"/"WARNING" in format strings manually to make
* these conditions distinguishable from kernel issues.

very much.

Thank you,

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