Re: [PATCH 3/4] printk: Defer printing to irq work when we printedtoo much

[Steven Rostedt]

On Thu, 7 Nov 2013 23:43:52 +0100
Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote:


> When a message takes tens of seconds to be printed, it usually means
> we are in trouble somehow :)
> I wonder what printk source can trigger such a high volume.

The only ones that I'm aware of is the prints from sysrq. Which
includes a ftrace_dump as well. These have caused issues in the past,
but usually I do them on boxes that I reboot afterward anyway.

-- Steve
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