linux-kernel - Re: [PATCH tip/core/rcu 39/45] rcutorture: Note diffs from git commits

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Date:	Fri, 9 May 2014 17:51:24 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	josh@...htriplett.org
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	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, dhowells@...hat.com, edumazet@...gle.com,
	darren@...art.com, fweisbec@...il.com, oleg@...hat.com, sbw@....edu
Subject: Re: [PATCH tip/core/rcu 39/45] rcutorture: Note diffs from git
 commits

On Wed, May 07, 2014 at 03:17:42PM -0700, josh@...htriplett.org wrote:
> On Mon, Apr 28, 2014 at 05:25:27PM -0700, Paul E. McKenney wrote:
> > From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
> > 
> > The current scripting only keeps track of the git SHA-1 of the current
> > HEAD.  This can cause confusion in cases where testing ran in a git
> > tree where changes had not yet been checked in.  This commit therefore
> > also records the output of "git diff HEAD" to provide the information
> > needed to reconstruct the source tree that was tested.
> > 
> > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> 
> Nit below.
> Reviewed-by: Josh Triplett <josh@...htriplett.org>
> 
> > ---
> >  tools/testing/selftests/rcutorture/bin/kvm.sh | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
> > index 4eed2a4f42c7..91661845fdec 100644
> > --- a/tools/testing/selftests/rcutorture/bin/kvm.sh
> > +++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
> > @@ -277,6 +277,11 @@ if test -d .git
> >  then
> >  	git status >> $resdir/$ds/testid.txt
> >  	git rev-parse HEAD >> $resdir/$ds/testid.txt
> > +	git diff HEAD > $T/git-diff 2>&1
> > +	if test -s $T/git-diff
> 
> You don't need test here; you can use the return value of git diff.

Oddly enough, the "git diff" man page does not say anything about the
exit value.  At least not that I could find...

							Thanx, Paul

> > +	then
> > +		cp $T/git-diff $resdir/$ds
> > +	fi
> >  fi
> >  ___EOF___
> >  awk < $T/cfgcpu.pack \
> > -- 
> > 1.8.1.5
> > 
> 

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