linux-kernel - Re: [RFC][PATCHv2 1/4] panic: avoid deadlocks in re-entrant console drivers

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Message-ID: <20181017044843.GD1068@jagdpanzerIV>
Date:   Wed, 17 Oct 2018 13:48:43 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Wang <wonderfly@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Jiri Slaby <jslaby@...e.com>,
        Peter Feiner <pfeiner@...gle.com>,
        linux-serial@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [RFC][PATCHv2 1/4] panic: avoid deadlocks in re-entrant console
 drivers

On (10/16/18 14:04), Sergey Senozhatsky wrote:
> 
> Fix this by setting oops_in_progress before console_flush_on_panic(),
> so re-entrant console drivers will trylock the port->lock instead of
> spinning on it forever.
> 

Just a small note:
    Regardless of what's going to happen to the series, this patch
    deserves attention.

	-ss