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From: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
	Petr Mladek <pmladek@suse.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jiri Slaby <jslaby@suse.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Dmitry Vyukov <dvyukov@google.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-serial <linux-serial@vger.kernel.org>,
	SergeySenozhatsky <sergey.senozhatsky@gmail.com>
Subject: Re: [RFC][PATCH 0/6] Use printk_safe context for TTY and UART port locks
Date: Fri, 22 Jun 2018 17:21:00 +0100	[thread overview]
Message-ID: <20180622172100.2293b5e5@alans-desktop> (raw)
In-Reply-To: <CA+55aFwpcbNO6FS4=O-BrsC4vMBaT3JeFG-_D9WtgmW+Dof3iA@mail.gmail.com>

On Wed, 20 Jun 2018 11:44:13 +0900
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Wed, Jun 20, 2018 at 11:34 AM Steven Rostedt <rostedt@goodmis.org> wrote:
> >
> > Perhaps we should do an audit of the console drivers and remove all
> > printk, pr_* , WARN*, BUG* from them.  
> 
> Only the actual _printing_ parts.

No because they are normally rather useful because that port isn't the
console. If you trylock it as I suggested then at least you'd just drop
the recursive cases and get messages otherwise.

Really that's all that you need - log the message to whichever console
targets you can currently safely do so. If it's none well there was
always the proposed morse code keyboard light driver 8)

Alan

  reply	other threads:[~2018-06-22 16:23 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-15  9:39 [RFC][PATCH 0/6] Use printk_safe context for TTY and UART port locks Sergey Senozhatsky
2018-06-15  9:39 ` [RFC][PATCH 1/6] printk: move printk_safe macros to printk header Sergey Senozhatsky
2018-06-18  6:27   ` Sergey Senozhatsky
2018-06-15  9:39 ` [RFC][PATCH 2/6] tty: add tty_port locking helpers Sergey Senozhatsky
2018-06-15  9:39 ` [RFC][PATCH 3/6] tty/pty: switch to tty_port helpers Sergey Senozhatsky
2018-06-15  9:39 ` [RFC][PATCH 4/6] serial: add uart port locking helpers Sergey Senozhatsky
2018-06-15  9:39 ` [RFC][PATCH 5/6] serial: switch to uart_port " Sergey Senozhatsky
2018-06-15  9:39 ` [RFC][PATCH 6/6] tty: 8250: " Sergey Senozhatsky
2018-06-18 13:38 ` [RFC][PATCH 0/6] Use printk_safe context for TTY and UART port locks Alan Cox
2018-06-19  0:53   ` Sergey Senozhatsky
2018-06-19  8:30     ` Petr Mladek
2018-06-19  8:59       ` Sergey Senozhatsky
2018-06-20  2:01       ` Linus Torvalds
2018-06-20  2:34         ` Steven Rostedt
2018-06-20  2:44           ` Linus Torvalds
2018-06-22 16:21             ` Alan Cox [this message]
2018-06-22 16:39               ` Peter Zijlstra
2018-06-23  5:21               ` Sergey Senozhatsky
2018-06-20  2:56           ` Sergey Senozhatsky
2018-06-20  2:50         ` Sergey Senozhatsky
2018-06-20  3:38           ` Linus Torvalds
2018-06-20  4:28             ` Sergey Senozhatsky
2018-06-28  2:55             ` Sergey Senozhatsky
2018-06-19  8:08   ` Peter Zijlstra

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