From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: Alternative to signals/sys_membarrier() in liburcu
Date: Sun, 15 Mar 2015 08:06:50 +1100
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Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>, Michael Sullivan <sully@msully.net>, Peter Zijlstra <peterz@infradead.org>, LKML <linux-kernel@vger.kernel.org>, Steven Rostedt <rostedt@goodmis.org>, lttng-dev@lists.lttng.org, Thomas Gleixner <tglx@linutronix.de>, Linus Torvalds <torvalds@linux-foundation.org>, Ingo Molnar <mingo@kernel.org>, linux-arch@vger.kernel.org

On Thu, 2015-03-12 at 14:12 -0700, Paul E. McKenney wrote:
> 
> Are there any architectures left that use hardware-assisted global
> TLB invalidation?  

ARM and PowerPC at least...

Cheers,
Ben.

> On such an architecture, you might not get a memory
> barrier except on the CPU executing the mprotect() or munmap().
> 
> (Here is hoping that no one does -- it is a cute abuse^Whack
> otherwise!)
> 
>