From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nathan_Lynch@mentor.com (Nathan Lynch)
Date: Mon, 11 Nov 2013 09:47:21 -0600
Subject: [lttng-dev] might_sleep warnings in overwrite mode
In-Reply-To: <52803E5D.3050109@mentor.com>
References: <52803E5D.3050109@mentor.com>
Message-ID: <5280FC09.7030208@mentor.com>

On 11/10/2013 08:18 PM, Nathan Lynch wrote:
> At this point I cannot trigger the issue without overwrite mode on
> 3.11.6, but on a 3.8-based vendor kernel I can recreate it regardless of
> the mode.
> 
> Is it possible that the lttng module code is messing up the current
> task's preempt count somehow?

Here's another manifestation of the issue -- when flood-pinging the
board during tracing, I get this warning from __do_softirq:

huh, entered softirq 3 NET_RX 804ae528 preempt_count 00000101, exited
with 00000102?