linux-kernel - Re: [PATCH rcu 7/7] rcutorture: Add srcu

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Message-ID: <bed30db4-d998-4382-a9a1-716c6f428263@paulmck-laptop>
Date:   Mon, 20 Mar 2023 12:09:00 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Boqun Feng <boqun.feng@...il.com>
Cc:     rcu@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Shuah Khan <shuah@...nel.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        seanjc@...gle.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH rcu 7/7] rcutorture: Add srcu_lockdep.sh

On Mon, Mar 20, 2023 at 11:19:05AM -0700, Boqun Feng wrote:
> Hi Paul,
> 
> On Thu, Mar 16, 2023 at 08:13:39PM -0700, Boqun Feng wrote:
> > From: "Paul E. McKenney" <paulmck@...nel.org>
> > 
> > This commit adds an srcu_lockdep.sh script that checks whether lockdep
> > correctly classifies SRCU-based, SRCU/mutex-based, and SRCU/rwsem-based
> > deadlocks.
> > 
> > Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> > [ boqun: Fix "RCUTORTURE" with "$RCUTORTURE" ]
> > Signed-off-by: Boqun Feng <boqun.feng@...il.com>
> > ---
> >  .../selftests/rcutorture/bin/srcu_lockdep.sh  | 73 +++++++++++++++++++
> >  1 file changed, 73 insertions(+)
> >  create mode 100755 tools/testing/selftests/rcutorture/bin/srcu_lockdep.sh
> > 
> > diff --git a/tools/testing/selftests/rcutorture/bin/srcu_lockdep.sh b/tools/testing/selftests/rcutorture/bin/srcu_lockdep.sh
> > new file mode 100755
> > index 000000000000..961932754684
> > --- /dev/null
> > +++ b/tools/testing/selftests/rcutorture/bin/srcu_lockdep.sh
> 
> Could you provide the SPDX header and copyright bits for this newly
> added file? For small changes I can do it myself, however this is about
> licenses and copyright, so I need it from you, thanks!

Good catch, thank you!

Would you like a delta patch to merge into your existing one, or would
you prefer a replacement patch?  Either way works for me.

							Thanx, Paul

> Regards,
> Boqun
> 
> > @@ -0,0 +1,73 @@
> > +#!/bin/bash
> > +#
> > +# Run SRCU-lockdep tests and report any that fail to meet expectations.
> > +
> > +usage () {
> > +	echo "Usage: $scriptname optional arguments:"
> > +	echo "       --datestamp string"
> > +	exit 1
> > +}
> > +
> > +ds=`date +%Y.%m.%d-%H.%M.%S`-srcu_lockdep
> > +scriptname="$0"
> > +
> > +T="`mktemp -d ${TMPDIR-/tmp}/srcu_lockdep.sh.XXXXXX`"
> > +trap 'rm -rf $T' 0
> > +
> > +RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
> > +PATH=${RCUTORTURE}/bin:$PATH; export PATH
> > +. functions.sh
> > +
> > +while test $# -gt 0
> > +do
> > +	case "$1" in
> > +	--datestamp)
> > +		checkarg --datestamp "(relative pathname)" "$#" "$2" '^[a-zA-Z0-9._/-]*$' '^--'
> > +		ds=$2
> > +		shift
> > +		;;
> > +	*)
> > +		echo Unknown argument $1
> > +		usage
> > +		;;
> > +	esac
> > +	shift
> > +done
> > +
> > +err=
> > +nerrs=0
> > +for d in 0 1
> > +do
> > +	for t in 0 1 2
> > +	do
> > +		for c in 1 2 3
> > +		do
> > +			err=
> > +			val=$((d*1000+t*10+c))
> > +			tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration 5s --configs "SRCU-P" --bootargs "rcutorture.test_srcu_lockdep=$val" --trust-make --datestamp "$ds/$val" > "$T/kvm.sh.out" 2>&1
> > +			ret=$?
> > +			mv "$T/kvm.sh.out" "$RCUTORTURE/res/$ds/$val"
> > +			if test "$d" -ne 0 && test "$ret" -eq 0
> > +			then
> > +				err=1
> > +				echo -n Unexpected success for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err"
> > +			fi
> > +			if test "$d" -eq 0 && test "$ret" -ne 0
> > +			then
> > +				err=1
> > +				echo -n Unexpected failure for > "$RCUTORTURE/res/$ds/$val/kvm.sh.err"
> > +			fi
> > +			if test -n "$err"
> > +			then
> > +				grep "rcu_torture_init_srcu_lockdep: test_srcu_lockdep = " "$RCUTORTURE/res/$ds/$val/SRCU-P/console.log" | sed -e 's/^.*rcu_torture_init_srcu_lockdep://' >> "$RCUTORTURE/res/$ds/$val/kvm.sh.err"
> > +				cat "$RCUTORTURE/res/$ds/$val/kvm.sh.err"
> > +				nerrs=$((nerrs+1))
> > +			fi
> > +		done
> > +	done
> > +done
> > +if test "$nerrs" -ne 0
> > +then
> > +	exit 1
> > +fi
> > +exit 0
> > -- 
> > 2.39.2
> >