linux-kernel - Re: [PATCH RFC tip/core/rcu 11/11] rcu: move TREE

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Message-ID: <20110223185235.GR2163@linux.vnet.ibm.com>
Date:	Wed, 23 Feb 2011 10:52:35 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	"Paul E. McKenney" <paul.mckenney@...aro.org>
Subject: Re: [PATCH RFC tip/core/rcu 11/11] rcu: move TREE_RCU from softirq
	to kthread

On Wed, Feb 23, 2011 at 09:02:01AM -0500, Mathieu Desnoyers wrote:
> * Paul E. McKenney (paulmck@...ux.vnet.ibm.com) wrote:
> [...]
> > +	for (cpu = rnp->grplo; cpu <= rnp->grphi; cpu++, mask <<= 1)
> > +		if (mask & 01)
> 
> Wow, octal notation! ;)

/me pauses to thank the octal-notation PDP-12, CDC 3300, CDC Cyber 73,
and PDP-11 systems for funding my college education.  The two CDC
systems had ones-complement in the bargain.  ;-)

> Maybe we could consider 0x1 here.

Good catch, fixed.  The hex says "bitmask" to me.

							Thanx, Paul
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