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

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Message-ID: <20090405170113.GB17934@one.firstfloor.org>
Date:	Sun, 5 Apr 2009 19:01:13 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Andi Kleen <andi@...stfloor.org>, 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 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.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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