On Mon, Sep 08, 2025 at 07:05:17PM +0200, Michel Dänzer wrote:
> These messages are primarily intended for developers, not users
But everybody sees them! And they're flooding the console.
And most people seeing them are users, not developers.
And if those messages are only for developers, they better be not visible by
default but behind a CONFIG_DEBUG or a similar switch.
And developers don't have every hw to test on. So you need to rely on users to
report issues to you. Because those messages probably don't fire on your hw
but someone else would hit them. And the chances are high that someone else is
a user.
So you want to make *all* your messages for users and have them report them
back to you.
> (which will notice and report the corresponding user-space issues instead).
The case due to which we're having this conversation didn't manifest itself
into anything - it was only flooding my dmesg. So users will notice nothing.
> The once variant means user-space developers need to reboot after hitting it
> once.
/sys/kernel/debug/clear_warn_once
Although when I tried it, it didn't help with dev_warn_once(). Perhaps needs
adding.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
