linux-kernel - Re: [PATCH RFC tip/core/rcu 1/3] rcu: The Bloatwatch Edition, v7

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Message-ID: <4AD4189B.2000308@cn.fujitsu.com>
Date:	Tue, 13 Oct 2009 14:05:15 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	paulmck@...ux.vnet.ibm.com
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, dhowells@...hat.com, avi@...hat.com,
	mtosatti@...hat.com, torvalds@...ux-foundation.org
Subject: Re: [PATCH RFC tip/core/rcu 1/3] rcu: The Bloatwatch Edition, v7

Paul E. McKenney wrote:
> Hmmmm...  Does this apply even when called from ksoftirqd?
> 
> Adding the local_irq_save() just out of paranoia for the moment.
> And therefore moving the local_irq_save() down to the common
> rcu_qsctr_help() function.  Which I am renaming to rcu_qs_help()
> for consistency.
> 
> Or am I missing something here?
> 


You are right! local_irq_save() is needed.

Lai
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