linux-kernel - Re: Porting "jump labels" to userspace

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Message-ID: <20110216203653.GA2015@Krystal>
Date:	Wed, 16 Feb 2011 15:36:53 -0500
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	David Daney <ddaney@...iumnetworks.com>
Cc:	Roland McGrath <roland@...hat.com>, Mark Wielaard <mjw@...hat.com>,
	Stefan Hajnoczi <stefanha@...il.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Julien Desfossez <julien.desfossez@...ymtl.ca>,
	dominique.toupin@...csson.com, ltt-dev@...ts.casi.polymtl.ca,
	systemtap@...rces.redhat.com, linux-kernel@...r.kernel.org,
	Jason Baron <jbaron@...hat.com>, hpa@...or.com,
	rostedt@...dmis.org, mingo@...e.hu, tglx@...utronix.de,
	andi@...stfloor.org, rth@...hat.com,
	masami.hiramatsu.pt@...achi.com, fweisbec@...il.com,
	avi@...hat.com, davem@...emloft.net, sam@...nborg.org,
	michael@...erman.id.au, Peter Zijlstra <peterz@...radead.org>
Subject: Re: Porting "jump labels" to userspace

* David Daney (ddaney@...iumnetworks.com) wrote:
> On 02/16/2011 12:00 PM, Mathieu Desnoyers wrote:
> [...]>
>> Actually, creating the equivalent of the jump labels for userspace is on our
>> list of "things to do" for the UST project.
>>
>> If Jason and other jump label contributors agree to dual-license the jump label
>> generic and per-arch implementations under both GPLv2 and LGPLv2.1, we could
>> probably re-use a large part of this code to create a static jump label library
>> for userspace. The concerned authors are precisely: Jason for generic and x86
>> code, Steven for some improvements in generic code and David S. Miller for the
>> sparc port. After things settle down with the current jump label changes
>> proposed by Peter Zijlstra, we might also want to ask for his permission to
>> LGPLize his changes.
>>
> FWIW:  MIPS jump label support is now in as of:
>
> 94bb0c1 (MIPS: jump label: Add MIPS support.)
>
> I would be the author of that.

Sorry David, my tree was a bit outdated from Linus's head :)

Mathieu

>
> David Daney

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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