linux-kernel - Re: [PATCH] printk: avoid livelock if another CPU printks continuously

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Message-ID: <56BA0ECE.2050106@redhat.com>
Date:	Tue, 09 Feb 2016 17:07:42 +0100
From:	Denys Vlasenko <dvlasenk@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org, srostedt@...hat.com,
	Tejun Heo <tj@...nel.org>,
	Peter Hurley <peter@...leysoftware.com>
Subject: Re: [PATCH] printk: avoid livelock if another CPU printks continuously

On 02/09/2016 04:50 PM, Steven Rostedt wrote:
> One thing is to find the spamming code and fix that.

We can't rely that there won't be never-ending concurrent printks,
right? For one, in many setups user can cause printk flood.

I think we must ensure that printk does not livelock.