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

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Message-ID: <20131220091113.GB21999@twins.programming.kicks-ass.net>
Date:	Fri, 20 Dec 2013 10:11:13 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Ingo Molnar <mingo@...nel.org>, Davidlohr Bueso <davidlohr@...com>,
	linux-kernel@...r.kernel.org, mingo@...hat.com,
	dvhart@...ux.intel.com, 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, Dec 19, 2013 at 02:35:17PM -0800, Joe Perches wrote:
> 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.

Abused; which is exactly what we're saying is not correct.

While doing so we've also found people abusing SoB where Reviewed-by was
meant and other 'creative' use.


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