[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230718031745.GA955071@google.com>
Date: Tue, 18 Jul 2023 12:17:45 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: John Ogness <john.ogness@...utronix.de>
Cc: Petr Mladek <pmladek@...e.com>,
Sergey Senozhatsky <senozhatsky@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH printk v3 3/7] printk: Keep non-panic-CPUs out of console
lock
On (23/07/17 21:52), John Ogness wrote:
>
> When in a panic situation, non-panic CPUs should avoid holding the
> console lock so as not to contend with the panic CPU. This is already
> implemented with abandon_console_lock_in_panic(), which is checked
> after each printed line. However, non-panic CPUs should also avoid
> trying to acquire the console lock during a panic.
>
> Modify console_trylock() to fail and console_lock() to block() when
> called from a non-panic CPU during a panic.
>
> Signed-off-by: John Ogness <john.ogness@...utronix.de>
Reviewed-by: Sergey Senozhatsky <senozhatsky@...omium.org>
Powered by blists - more mailing lists