Re: WARN_ONCE does not warn once

Michal Suchánek [off-list ref] writes:

On Thu, Nov 14, 2019 at 05:46:55PM +0100, Michal Suchánek wrote:

quoted

Hello,

on powernv with 5.3.8 kernel I get flood of messages on boot.

The messages match WARN_ONCE(1, "opal: OPAL_CONSOLE_FLUSH missing.\n");

Asking around it was pointed out that WARN_ONCE warns up to as many
times as you have CPUs.

Does it?

Did not bother counting the messages but it may very well be the case it
is printed once for each CPU.

The way it's implemented is slightly racy, but I'd be surprised if every
CPU hit that race all at once.

Can you give us the full dmesg?

cheers