linux-kernel - Re: [PATCH v3 4/4] futex: Avoid taking hb lock if nothing to wakeup

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Date:	Thu, 19 Dec 2013 14:35:17 -0800
From:	Joe Perches <joe@...ches.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Davidlohr Bueso <davidlohr@...com>, linux-kernel@...r.kernel.org,
	mingo@...hat.com, dvhart@...ux.intel.com, peterz@...radead.org,
	tglx@...utronix.de, paulmck@...ux.vnet.ibm.com, efault@....de,
	jeffm@...e.com, torvalds@...ux-foundation.org, jason.low2@...com,
	Waiman.Long@...com, tom.vaden@...com, scott.norton@...com,
	aswin@...com
Subject: Re: [PATCH v3 4/4] futex: Avoid taking hb lock if nothing to wakeup

On Thu, 2013-12-19 at 20:42 +0100, Ingo Molnar wrote:
> * Davidlohr Bueso <davidlohr@...com> wrote:
> 
> > On Thu, 2013-12-19 at 20:25 +0100, Ingo Molnar wrote:
> > > * Davidlohr Bueso <davidlohr@...com> wrote:
> > > 
> > > > Signed-off-by: Davidlohr Bueso <davidlohr@...com>
> > > > Signed-off-by: Waiman Long <Waiman.Long@...com>
> > > > Signed-off-by: Jason Low <jason.low2@...com>
> > > 
> > > So, that's not a valid SOB sequence either, the person sending me a 
> > > patch should be the last person in the SOB chain 
> > 
> > Which is why I had it like that in the original version.
> 
> The problem with that order was that the first person should be the 
> primary author and in the 'From' tag.
> 
> A SOB chain is intended to depict the true propagation/route of a 
> patch, from author, through maintainers who handle and forward it, to 
> the maintainer who applies it to a Git tree. The patch starts up with 
> a single SOB (the primary author's) and every 'hop' after that adds a 
> SOB to the tail of the existing SOB chain.

Multiple "Signed-off-by:"s are also used when there are
multiple authors of a single patch.


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