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Date: Tue, 7 Apr 2015 14:54:16 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
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        linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: [PATCH v2 1/2] rtmutex Real-Time Linux: Fixing kernel BUG at
 kernel/locking/rtmutex.c:997!
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On Tue, Apr 07, 2015 at 08:41:54AM -0400, Steven Rostedt wrote:
> Ideally, we don't want to take mutexes in hard interrupt context.

Nothing ideal about it. Hard requirement, anything else is plain
insanity.