Re: [PATCH printk v3 1/6] lib/nmi_backtrace: explicitly serialize banner and regs
From: Petr Mladek
Date: Thu Jun 24 2021 - 08:26:51 EST
On Thu 2021-06-24 13:17:43, John Ogness wrote:
> Currently the nmi_backtrace is serialized against other CPUs because
> the messages are sent to the NMI buffers. Once these buffers are
> removed, only the dumped stack will be serialized against other CPUs
> (via the printk_cpu_lock).
> Also serialize the nmi_backtrace banner and regs using the
> printk_cpu_lock so that per-CPU serialization will be preserved even
> after the NMI buffers are removed.
> Signed-off-by: John Ogness <john.ogness@xxxxxxxxxxxxx>
Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>