linux-kernel - Re: [PATCH RFC tip/core/rcu 0/5] Expedited grace periods encouraging normal ones

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Message-ID: <CANn89iJEfeeOB5HxGdPpF9HFkrditbzQyDJK18BLDBZhgyDpmA@mail.gmail.com>
Date:	Wed, 1 Jul 2015 16:08:27 +0200
From:	Eric Dumazet <edumazet@...gle.com>
To:	Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Josh Triplett <josh@...htriplett.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>, laijs@...fujitsu.com,
	dipankar@...ibm.com, Andrew Morton <akpm@...ux-foundation.org>,
	mathieu.desnoyers@...icios.com,
	Thomas Gleixner <tglx@...utronix.de>, rostedt@...dmis.org,
	dhowells@...hat.com, dvhart@...ux.intel.com, fweisbec@...il.com,
	oleg@...hat.com, bobby.prani@...il.com
Subject: Re: [PATCH RFC tip/core/rcu 0/5] Expedited grace periods encouraging
 normal ones

> OK, I'll bite.  Exactly what seems especially vile about it?

Presumably we would need to convert everything to async model
(call_rcu() and friends),
but that is a long way to go...

For example, synchronize_srcu_expedited() in kvm_set_irq_routing()
really looks overkill.
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