linux-kernel - Re: [PATCH tip/core/rcu 0/5] Documentation and rcutorture changes

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Date:	Thu, 30 Aug 2012 16:22:16 -0700
From:	Josh Triplett <josh@...htriplett.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	git@...r.kernel.org, linux-kernel@...r.kernel.org, mingo@...e.hu,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	niv@...ibm.com, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, Valdis.Kletnieks@...edu, dhowells@...hat.com,
	eric.dumazet@...il.com, darren@...art.com, fweisbec@...il.com,
	sbw@....edu, patches@...aro.org
Subject: Re: [PATCH tip/core/rcu 0/5] Documentation and rcutorture changes

On Thu, Aug 30, 2012 at 02:46:03PM -0700, Paul E. McKenney wrote:
> On Thu, Aug 30, 2012 at 11:56:09AM -0700, Josh Triplett wrote:
> > On Thu, Aug 30, 2012 at 11:44:48AM -0700, Paul E. McKenney wrote:
> > > Hello!
> > > 
> > > This series covers changes to rcutorture and documentation updates.
> > > The individual patches in this series are as follows:
> > > 
> > > 1.	Update rcutorture default values so that casual rcutorture
> > > 	users will do more aggressive testing.
> > > 2.	Make rcutorture track CPU-hotplug latency statistics.
> > > 3.	Document SRCU's new-found ability to be used by offline and
> > > 	idle CPUs, and also emphasize SRCU's limitations.
> > > 4.	Use the new pr_*() interfaces in rcutorture.
> > > 5.	Prevent kthread-initialization races in rcutorture.
> > > 
> > > 							Thanx, Paul
> > > 
> > > ------------------------------------------------------------------------
> > > 
> > >  b/Documentation/RCU/checklist.txt |    6 +
> > >  b/Documentation/RCU/whatisRCU.txt |    9 +-
> > >  b/kernel/rcutorture.c             |    4 -
> > >  kernel/rcutorture.c               |  152 +++++++++++++++++++++++---------------
> > >  4 files changed, 108 insertions(+), 63 deletions(-)
> > 
> > Something seems wrong with this diffstat; how'd the b/ prefixes get
> > there, and why does it list kernel/rcutorture.c twice, once with and
> > once without?
> 
> Hmmm...  It seems quite reproducible.  I did the usual git-format-patch
> and ran the resulting set of patches through diffstat.  I seem to have a
> broken diffstat...
> 
> However, git diff --stat v3.6-rc1..hotplug.2012.08.28a generates the
> following:
> 
>  kernel/rcutree.c       |   93 +++++++++++-------------------------------------
>  kernel/rcutree.h       |    3 --
>  kernel/rcutree_trace.c |    4 +-
>  kernel/sched/core.c    |   41 ++++++++++-----------
>  4 files changed, 43 insertions(+), 98 deletions(-)
> 
> Which does look much better.

You might try generating your cover letter template via git format-patch
--cover-letter, which will automatically give you a list of patches and
a git-produced diffstat; much easier than trying to format a cover
letter by hand.  Meanwhile, you might consider sending your patches as a
bug report to diffstat upstream: Thomas E. Dickey
<dickey@...isible-island.net>.

- Josh Triplett
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