Re: [PATCH V2] docs: panic: Disclaimer about console verbosity when using panic_print with pstore

[Petr Mladek]

On Wed 2026-08-19 15:31:30, Guilherme G. Piccoli wrote:
> Users of panic_print / panic_sys_info are usually aware of the potentially
> huge amount of information displayed with such options - their goal by
> using them is indeed to dump more information during panic!
> 
> What might come unnoticed at first is the impact that the console_verbose()
> call on panic path has, specially in cases that users rely on pstore as
> a means to collect the panic logs. Recent experience shows that dumping
> all tasks in an ARM64 system (with qcom_geni tty driver) gets a 2 minute
> delay on panic time due to writing such information to console. But in
> that case, pstore was used, so there was no need for console printing,
> and suppressing that reduced the full time to less than 0.5 second.
> 
> The option "printk.console_no_auto_verbose" aims exactly at this use
> case: avoid automatically increasing the loglevel during panic path.
> So, let's officially document this to avoid users wasting their time
> either on long panic printing or debugging the panic delays.
> 
> While at it, improve the readability of the panic_print text, by
> adding some line breaks.
> 
> Suggested-by: Petr Mladek <pmladek@xxxxxxxx>
> Reviewed-by: Bradley Morgan <include@xxxxxxxxx>
> Reviewed-by: Feng Tang <feng.tang@xxxxxxxxxxxxxxxxx>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx>

Looks good to me:

Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>

I am not sure if the doc team would want to take it.

I am going to wait a week or so. Then I would take it via
the printk tree if anyone else did not take it in the meantime.

Best Regards,
Petr