linux-kernel - Re: [PATCH 2/2] jump label: introduce static

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Message-ID: <1294257893.26623.116.camel@gandalf.stny.rr.com>
Date:	Wed, 05 Jan 2011 15:04:53 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	David Miller <davem@...emloft.net>
Cc:	ddaney@...iumnetworks.com, jbaron@...hat.com, ralf@...ux-mips.org,
	peterz@...radead.org, mathieu.desnoyers@...ymtl.ca, hpa@...or.com,
	mingo@...e.hu, tglx@...utronix.de, andi@...stfloor.org,
	roland@...hat.com, rth@...hat.com, masami.hiramatsu.pt@...achi.com,
	fweisbec@...il.com, avi@...hat.com, sam@...nborg.org,
	michael@...erman.id.au, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] jump label: introduce static_branch()

On Wed, 2011-01-05 at 10:44 -0800, David Miller wrote:
> From: Steven Rostedt <rostedt@...dmis.org>
> Date: Wed, 05 Jan 2011 12:43:59 -0500
> 
> > On Wed, 2011-01-05 at 09:32 -0800, David Daney wrote:
> > 
> >> This patch will conflict with the MIPS jump label support that Ralf has 
> >> queued up for 2.6.38.
> > 
> > Can you disable that support for now? As Linus said at Kernel Summit,
> > other archs jumped too quickly onto the jump label band wagon.
> 
> I totally disagree with this assesment.  Implementing jump label for
> sparc64 as early as possible found so much broken stuff that otherwise
> would have merged in before any other architecture tried supporting
> it.

The issue here is that jump labels went in too fast. And I agree that
having it ported to all archs is/was important. But the infrastructure
needs to be cleaned up.

Probably best to get out the kinks in Linux next as suppose to mainline.

-- Steve


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