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Date:   Tue, 29 Nov 2022 15:58:31 -0800
From:   "Paul E. McKenney" <paulmck@kernel.org>
To:     Shuah Khan <skhan@linuxfoundation.org>
Cc:     Tiezhu Yang <yangtiezhu@loongson.cn>, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, shuah@kernel.org
Subject: Re: [PATCH v2 0/6] selftests: Use "grep -E" instead of "egrep"
Message-ID: <20221129235831.GH4001@paulmck-ThinkPad-P17-Gen-1>
Reply-To: paulmck@kernel.org
References: <1669165413-12035-1-git-send-email-yangtiezhu@loongson.cn>
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 <d48804d5-2ad5-fbfb-ce17-83fbc450d3d6@linuxfoundation.org>
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On Tue, Nov 29, 2022 at 04:30:39PM -0700, Shuah Khan wrote:
> On 11/29/22 16:22, Paul E. McKenney wrote:
> 
> > Lazybones that I am, I would rather carry the patch than resolve
> > conflicts.  Especially given the tendency for new rcutorture patches to
> > appear, thus changing the conflict resolution.
> > 
> 
> Sounds good. I will drop the one I applied to my tree.
> 
> > My guess is that the patch is this one:
> > 
> > https://lore.kernel.org/lkml/1669165413-12035-2-git-send-email-yangtiezhu@loongson.cn/
> > 
> > Or should I be looking elsewhere?
> 
> Yup that is one.

Very good, thank you!  I have queued it as shown below.

							Thanx, Paul

------------------------------------------------------------------------

commit 72dcfda0e73be7e2e8b7faf0299b0f43c20af015
Author: Tiezhu Yang <yangtiezhu@loongson.cn>
Date:   Wed Nov 23 09:03:28 2022 +0800

    selftests: rcutorture: Use "grep -E" instead of "egrep"
    
    The latest version of grep is deprecating the egrep command, so that
    its output contains warnings as follows:
    
            egrep: warning: egrep is obsolescent; using grep -E
    
    Fix this using "grep -E" instead.
    
      sed -i "s/egrep/grep -E/g" `grep egrep -rwl tools/testing/selftests/rcutorture`
    
    Here are the steps to install the latest grep:
    
      wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz
      tar xf grep-3.8.tar.gz
      cd grep-3.8 && ./configure && make
      sudo make install
      export PATH=/usr/local/bin:$PATH
    
    Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
    Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/tools/testing/selftests/rcutorture/bin/console-badness.sh b/tools/testing/selftests/rcutorture/bin/console-badness.sh
index 69f8a5958cefc..aad51e7c0183d 100755
--- a/tools/testing/selftests/rcutorture/bin/console-badness.sh
+++ b/tools/testing/selftests/rcutorture/bin/console-badness.sh
@@ -10,7 +10,7 @@
 #
 # Authors: Paul E. McKenney <paulmck@kernel.org>
 
-egrep 'Badness|WARNING:|Warn|BUG|===========|BUG: KCSAN:|Call Trace:|Oops:|detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state|rcu_.*kthread starved for|!!!' |
+grep -E 'Badness|WARNING:|Warn|BUG|===========|BUG: KCSAN:|Call Trace:|Oops:|detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state|rcu_.*kthread starved for|!!!' |
 grep -v 'ODEBUG: ' |
 grep -v 'This means that this is a DEBUG kernel and it is' |
 grep -v 'Warning: unable to open an initial console' |
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-build.sh b/tools/testing/selftests/rcutorture/bin/kvm-build.sh
index e28a82851f7c4..11f8d232b0ee7 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-build.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-build.sh
@@ -44,10 +44,10 @@ fi
 ncpus="`getconf _NPROCESSORS_ONLN`"
 make -j$((2 * ncpus)) $TORTURE_KMAKE_ARG > $resdir/Make.out 2>&1
 retval=$?
-if test $retval -ne 0 || grep "rcu[^/]*": < $resdir/Make.out | egrep -q "Stop|Error|error:|warning:" || egrep -q "Stop|Error|error:" < $resdir/Make.out
+if test $retval -ne 0 || grep "rcu[^/]*": < $resdir/Make.out | grep -E -q "Stop|Error|error:|warning:" || grep -E -q "Stop|Error|error:" < $resdir/Make.out
 then
 	echo Kernel build error
-	egrep "Stop|Error|error:|warning:" < $resdir/Make.out
+	grep -E "Stop|Error|error:|warning:" < $resdir/Make.out
 	echo Run aborted.
 	exit 3
 fi
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
index d4dc059843a43..28981007465bd 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh
@@ -32,9 +32,9 @@ for i in ${rundir}/*/Make.out
 do
 	scenariodir="`dirname $i`"
 	scenariobasedir="`echo ${scenariodir} | sed -e 's/\.[0-9]*$//'`"
-	if egrep -q "error:|warning:|^ld: .*undefined reference to" < $i
+	if grep -E -q "error:|warning:|^ld: .*undefined reference to" < $i
 	then
-		egrep "error:|warning:|^ld: .*undefined reference to" < $i > $i.diags
+		grep -E "error:|warning:|^ld: .*undefined reference to" < $i > $i.diags
 		files="$files $i.diags $i"
 	elif ! test -f ${scenariobasedir}/vmlinux && ! test -f ${scenariobasedir}/vmlinux.xz && ! test -f "${rundir}/re-run"
 	then
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index 7710b1e1cddab..3025a949bc99e 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -585,7 +585,7 @@ awk < $T/cfgcpu.pack \
 echo kvm-end-run-stats.sh "$resdir/$ds" "$starttime" >> $T/script
 
 # Extract the tests and their batches from the script.
-egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
+grep -E 'Start batch|Starting build\.' $T/script | grep -v ">>" |
 	sed -e 's/:.*$//' -e 's/^echo //' -e 's/-ovf//' |
 	awk '
 	/^----Start/ {
@@ -622,7 +622,7 @@ then
 elif test "$dryrun" = sched
 then
 	# Extract the test run schedule from the script.
-	egrep 'Start batch|Starting build\.' $T/script | grep -v ">>" |
+	grep -E 'Start batch|Starting build\.' $T/script | grep -v ">>" |
 		sed -e 's/:.*$//' -e 's/^echo //'
 	nbuilds="`grep 'Starting build\.' $T/script |
 		  grep -v ">>" | sed -e 's/:.*$//' -e 's/^echo //' |
diff --git a/tools/testing/selftests/rcutorture/bin/parse-console.sh b/tools/testing/selftests/rcutorture/bin/parse-console.sh
index 822eb037a0573..9ab0f6bc172cd 100755
--- a/tools/testing/selftests/rcutorture/bin/parse-console.sh
+++ b/tools/testing/selftests/rcutorture/bin/parse-console.sh
@@ -65,7 +65,7 @@ then
 	fi
 
 	grep --binary-files=text 'torture:.*ver:' $file |
-	egrep --binary-files=text -v '\(null\)|rtc: 000000000* ' |
+	grep -E --binary-files=text -v '\(null\)|rtc: 000000000* ' |
 	sed -e 's/^(initramfs)[^]]*] //' -e 's/^\[[^]]*] //' |
 	sed -e 's/^.*ver: //' |
 	awk '
@@ -128,17 +128,17 @@ then
 	then
 		summary="$summary  Badness: $n_badness"
 	fi
-	n_warn=`grep -v 'Warning: unable to open an initial console' $file | grep -v 'Warning: Failed to add ttynull console. No stdin, stdout, and stderr for the init process' | egrep -c 'WARNING:|Warn'`
+	n_warn=`grep -v 'Warning: unable to open an initial console' $file | grep -v 'Warning: Failed to add ttynull console. No stdin, stdout, and stderr for the init process' | grep -E -c 'WARNING:|Warn'`
 	if test "$n_warn" -ne 0
 	then
 		summary="$summary  Warnings: $n_warn"
 	fi
-	n_bugs=`egrep -c '\bBUG|Oops:' $file`
+	n_bugs=`grep -E -c '\bBUG|Oops:' $file`
 	if test "$n_bugs" -ne 0
 	then
 		summary="$summary  Bugs: $n_bugs"
 	fi
-	n_kcsan=`egrep -c 'BUG: KCSAN: ' $file`
+	n_kcsan=`grep -E -c 'BUG: KCSAN: ' $file`
 	if test "$n_kcsan" -ne 0
 	then
 		if test "$n_bugs" = "$n_kcsan"
@@ -158,7 +158,7 @@ then
 	then
 		summary="$summary  lockdep: $n_badness"
 	fi
-	n_stalls=`egrep -c 'detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state' $file`
+	n_stalls=`grep -E -c 'detected stalls on CPUs/tasks:|self-detected stall on CPU|Stall ended before state dump start|\?\?\? Writer stall state' $file`
 	if test "$n_stalls" -ne 0
 	then
 		summary="$summary  Stalls: $n_stalls"