linux-kernel - Re: [PATCH v2 1/2] sched: Add cond_resched_rcu

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Message-ID: <20130501151752.GA7521@dyad.programming.kicks-ass.net>
Date:	Wed, 1 May 2013 17:17:53 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Julian Anastasov <ja@....bg>, Simon Horman <horms@...ge.net.au>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Ingo Molnar <mingo@...hat.com>, lvs-devel@...r.kernel.org,
	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Dipankar Sarma <dipankar@...ibm.com>
Subject: Re: [PATCH v2 1/2] sched: Add cond_resched_rcu_lock() helper

On Wed, May 01, 2013 at 05:46:37AM -0700, Paul E. McKenney wrote:

> If the only goal is to allow preemption, and if long grace periods are
> not a concern, then this alternate approach would work fine as well.

Hmm.. if that were the goal I'd like it to have a different name;
cond_resched*() has always been about preemption.

> Of course, both approaches assume that the caller is in a place
> where having all RCU-protected data disappear is OK!

Quite :-)
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