linux-kernel - Re: [PATCH -tip] Convert CONFIG_SMP=y powerpc defconfigs to TREE

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Date:	Sun, 5 Apr 2009 10:15:00 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Josh Boyer <jwboyer@...il.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	dipankar@...ibm.com, niv@...ibm.com, manfred@...orfullife.com,
	peterz@...radead.org, lethal@...ux-sh.org, kernel@...tstofly.org,
	kyle@...artin.ca, deller@....de, davem@...emloft.net,
	ralf@...ux-mips.org, jes@....com, benh@...nel.crashing.org,
	paulus@...ba.org, anton@...ba.org
Subject: Re: [PATCH -tip] Convert CONFIG_SMP=y powerpc defconfigs to
	TREE_RCU.

On Sun, Apr 05, 2009 at 07:01:13PM +0200, Andi Kleen wrote:
> On Sun, Apr 05, 2009 at 09:49:04AM -0700, Paul E. McKenney wrote:
> > On Sun, Apr 05, 2009 at 12:37:59PM +0200, Andi Kleen wrote:
> > > > I'd suggest you dont do these dozens of defconfig updates at all - 
> > > > arch maintainers can do this themselves, once the core kernel 
> > > > default has been flipped.
> > > 
> > > AFAIK they don't. There's no make updatemyconfigwithdefaultstatementsconfig
> > 
> > My guess is that I would in fact have to send a few patches.  But I
> > suppose that the real question is "how long should we wait to drop
> > Classic RCU once the last arch has changed its defconfig?"  I have
> > been assuming that we would wait one release cycle.
> 
> I don't think you have to wait, stale entries in defconfigs happen
> all the time and Kconfig just asks then.

Good point!

							Thanx, Paul
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