linux-kernel - Re: [RFC PATCH v4 9/9] printk: use a new ringbuffer implementation

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Date:   Tue, 10 Sep 2019 12:19:08 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        John Ogness <john.ogness@...utronix.de>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrea Parri <andrea.parri@...rulasolutions.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Brendan Higgins <brendanhiggins@...gle.com>
Subject: Re: [RFC PATCH v4 9/9] printk: use a new ringbuffer implementation

On (08/10/19 07:53), Thomas Gleixner wrote:
> 
> Right now we have an implementation for serial only, but that already is
> useful. I nicely got (minimaly garbled) crash dumps out of an NMI
> handler. With the current mainline console code the machine just hung.
> 

Thomas, any chance you can post backtraces? Just curious where exactly
current printk() and console_drivers() hung.

	-ss