linux-kernel - Re: [RFC PATCH RT] netconsole: enable netconsole on PREEMPT

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Message-ID: <20140509155515.GJ29014@linutronix.de>
Date:	Fri, 9 May 2014 17:55:15 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Daniel Bristot de Oliveira <bristot@...hat.com>
Cc:	Paul Gortmaker <paul.gortmaker@...driver.com>,
	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	rostedt@...dmis.org
Subject: Re: [RFC PATCH RT] netconsole: enable netconsole on PREEMPT_RT

* Daniel Bristot de Oliveira | 2014-05-05 16:10:51 [-0300]:

>Figure out why it was disabled is one objective of this RFC :-).

The patch first appeared in patch-3.2-rt10.patch. Haven't seen it in
v3.0-rt1 nor in in the first v3.2-rcX-rt1. I would assume that it was
something locking specific.
I haven't seen any lockdep splat in current v3.14-RT. Therefore I'm
going to drop that hunk from the patch so it can be enabled again.

Since I don't really know why it was disabled in v3.2 I think it is
best not to backport this change unless someone figures out the real
reason and provides proof that it works in the older kernel as well.

Sebastian
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