Steven Rostedt <rostedt@xxxxxxxxxxx> writes: > On Thu, 26 Sep 2024 19:54:48 +0200 > Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > >> Hi, >> >> On 26-Sep-24 7:01 PM, Steven Rostedt wrote: >> > From: Steven Rostedt <rostedt@xxxxxxxxxxx> >> > >> > At the 2024 Linux Plumbers Conference, I was talking with Hans de Goede >> > about the persistent buffer to display traces from previous boots. He >> > mentioned that UEFI can clear memory. In my own tests I have not seen >> > this. He later informed me that it requires the config option: >> > >> > CONFIG_RESET_ATTACK_MITIGATION >> > >> > It appears that setting this will allow the memory to be cleared on boot >> > up, which will definitely clear out the trace of the previous boot. >> > >> > Add this information under the trace_instance in kernel-parameters.txt >> > to let people know that this can cause issues. >> > >> > Link: https://lore.kernel.org/all/20170825155019.6740-2-ard.biesheuvel@xxxxxxxxxx/ >> > >> > Reported-by: Hans de Goede <hdegoede@xxxxxxxxxx> >> > Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> >> >> Thanks, patch looks good to me: >> >> Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx> > > Thanks, > > And I forgot to send this to the Documentation maintainers :-p > > Jon, could you take this? Do you need me to resend, or can you just pull it > from lore? I'll grab it in a bit. jon
