linux-kernel - Re: [PATCH] printk: Don't discard earlier unprinted messages to make space

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Message-ID: <1445517382.4113.57.camel@infradead.org>
Date:	Thu, 22 Oct 2015 13:36:22 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Jan Kara <jack@...e.cz>
Cc:	David Howells <dhowells@...hat.com>, linux-kernel@...r.kernel.org,
	will.deacon@....com, rostedt@...dmis.org, pmladek@...e.cz
Subject: Re: [PATCH] printk: Don't discard earlier unprinted messages to
 make space

On Thu, 2015-10-22 at 14:18 +0200, Jan Kara wrote:
> 
> > 
> > What happened to it? And how do we fix it?
> 
> Hard to fix since you'd easily get RCU stalls and softlockup messages on
> systems with lots of CPUs and heavy printk traffic...

If we have to explicitly opt in to synchronous output, then such things
should be tolerable.

-- 
dwmw2


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