linux-kernel - Re: [PATCH] rcu: Is it safe to enter an RCU read-side critical section?

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Message-ID: <0000014112a03407-7ceda101-3abe-4eb3-ae4b-ca6b125b0d82-000000@email.amazonses.com>
Date:	Thu, 12 Sep 2013 14:43:12 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Ingo Molnar <mingo@...nel.org>
cc:	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...icios.com, josh@...htriplett.org,
	niv@...ibm.com, tglx@...utronix.de, rostedt@...dmis.org,
	dhowells@...hat.com, edumazet@...gle.com, darren@...art.com,
	sbw@....edu
Subject: Re: [PATCH] rcu: Is it safe to enter an RCU read-side critical
 section?

On Thu, 12 Sep 2013, Ingo Molnar wrote:

> My NAK of the original patches stands until the debug checks are working
> and are put up for a merge. You were talking nonsense all around in this
> thread and I simply don't trust your promise, but I'll obviously trust a
> queued up fix.

You could just pick up the existing preempt check patches and fix them up
and merge now saving me the work. We will have the checks immediately for
3.12. The conversion of all the source code from __get_cpu_var can be done
later.

It would not be that complicated to do even without my patches.




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