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Date: Tue, 25 Jan 2022 21:14:27 -0800
From: "Paul E. McKenney" <paulmck@...nel.org>
To: Zhouyi Zhou <zhouzhouyi@...il.com>
Cc: Paul Menzel <pmenzel@...gen.mpg.de>,
Josh Triplett <josh@...htriplett.org>,
rcu <rcu@...r.kernel.org>, linux-kselftest@...r.kernel.org,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: Problems with rcutorture on ppc64le: allmodconfig(2) and other
failures
On Tue, Jan 25, 2022 at 08:50:22PM -0800, Paul E. McKenney wrote:
> On Wed, Jan 26, 2022 at 12:09:12PM +0800, Zhouyi Zhou wrote:
> > Great Discovery !!
> > Hi Paul,
> > I track the log
> > make[2]: *** No rule to make target
> > 'arch/x86/kvm//home/zzy/Program/linux-next/linux-next/tools/testing/selftests/rcutorture/kvm_main.o',
>
> That does look like a very odd pathname, now that you mention it.
>
> > needed by 'arch/x86/kvm/kvm.o
> > into the file virt/kvm/Makefile.kvm:
> > 1# SPDX-License-Identifier: GPL-2.0
> > 2#
> > 3# Makefile for Kernel-based Virtual Machine module
> > 4#
> > 5
> > 6KVM ?= ../../../virt/kvm
> > 7
> > 8kvm-y := $(KVM)/kvm_main.o $(KVM)/eventfd.o $(KVM)/binary_stats.o
> > 9kvm-$(CONFIG_KVM_VFIO) += $(KVM)/vfio.o
> > 10kvm-$(CONFIG_KVM_MMIO) += $(KVM)/coalesced_mmio.o
> > 11kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o
> > 12kvm-$(CONFIG_HAVE_KVM_IRQ_ROUTING) += $(KVM)/irqchip.o
> > 13kvm-$(CONFIG_HAVE_KVM_DIRTY_RING) += $(KVM)/dirty_ring.o
> > 14kvm-$(CONFIG_HAVE_KVM_PFNCACHE) += $(KVM)/pfncache.o
> > line 6's ?= indicates to set the KDIR variable only if it's not
> > set/doesn't have a value.
> >
> > I guess we have set the variable KVM somewhere before make, I will
> > continue tracking it.
>
> But if you build an allmodconfig kernel by hand afterwards, it works?
>
> I wonder if I need to use a different environment variable in my scripts.
> For example, from tools/testing/selftests/rcutorture/bin/kvm.sh:
>
> KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
> PATH=${KVM}/bin:$PATH; export PATH
>
> Maybe like the (untested) patch shown below.
A somewhat more official version below. Thank you for following up
on this!
Thanx, Paul
------------------------------------------------------------------------
commit 6b5cdbe80b01ce604fdf0f3ef6717a6466aca041
Author: Paul E. McKenney <paulmck@...nel.org>
Date: Tue Jan 25 21:08:55 2022 -0800
torture: Change KVM environment variable to RCUTORTURE
The torture-test scripting's long-standing use of KVM as the environment
variable tracking the pathname of the rcutorture directory now conflicts
with allmodconfig builds due to the virt/kvm/Makefile.kvm file's use
of this as a makefile variable. This commit therefore changes the
torture-test scripting from KVM to RCUTORTURE, avoiding the name conflict.
Reported-by: Zhouyi Zhou <zhouzhouyi@...il.com>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-again.sh b/tools/testing/selftests/rcutorture/bin/kvm-again.sh
index 5a0023d183dac..0941f1ddab658 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-again.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-again.sh
@@ -47,8 +47,8 @@ else
exit 1
fi
-KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
-PATH=${KVM}/bin:$PATH; export PATH
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
. functions.sh
dryrun=
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh b/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh
index 370406bbfeedc..f17000a2ccf1f 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-check-branches.sh
@@ -49,8 +49,8 @@ fi
mkdir $resdir/$ds
echo Results directory: $resdir/$ds
-KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
-PATH=${KVM}/bin:$PATH; export PATH
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
. functions.sh
echo Using all `identify_qemu_vcpus` CPUs.
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh b/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh
index e4a00779b8c69..ee886b40a5d2c 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-end-run-stats.sh
@@ -22,8 +22,8 @@ T=${TMPDIR-/tmp}/kvm-end-run-stats.sh.$$
trap 'rm -rf $T' 0
mkdir $T
-KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
-PATH=${KVM}/bin:$PATH; export PATH
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
. functions.sh
default_starttime="`get_starttime`"
starttime="${2-default_starttime}"
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-remote.sh b/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
index 29b068a55b466..8c4c1e4792d02 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-remote.sh
@@ -19,8 +19,8 @@ then
exit 1
fi
-KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
-PATH=${KVM}/bin:$PATH; export PATH
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
. functions.sh
starttime="`get_starttime`"
@@ -108,8 +108,8 @@ else
cat $T/kvm-again.sh.out | tee -a "$oldrun/remote-log"
exit 2
fi
- cp -a "$rundir" "$KVM/res/"
- oldrun="$KVM/res/$ds"
+ cp -a "$rundir" "$RCUTORTURE/res/"
+ oldrun="$RCUTORTURE/res/$ds"
fi
echo | tee -a "$oldrun/remote-log"
echo " ----" kvm-again.sh output: "(`date`)" | tee -a "$oldrun/remote-log"
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index 348ad177a5acc..55b2c15332827 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -25,15 +25,15 @@ LANG=en_US.UTF-8; export LANG
dur=$((30*60))
dryrun=""
-KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
-PATH=${KVM}/bin:$PATH; export PATH
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
. functions.sh
TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
TORTURE_DEFCONFIG=defconfig
TORTURE_BOOT_IMAGE=""
TORTURE_BUILDONLY=
-TORTURE_INITRD="$KVM/initrd"; export TORTURE_INITRD
+TORTURE_INITRD="$RCUTORTURE/initrd"; export TORTURE_INITRD
TORTURE_KCONFIG_ARG=""
TORTURE_KCONFIG_GDB_ARG=""
TORTURE_BOOT_GDB_ARG=""
@@ -262,7 +262,7 @@ else
exit 1
fi
-CONFIGFRAG=${KVM}/configs/${TORTURE_SUITE}; export CONFIGFRAG
+CONFIGFRAG=${RCUTORTURE}/configs/${TORTURE_SUITE}; export CONFIGFRAG
defaultconfigs="`tr '\012' ' ' < $CONFIGFRAG/CFLIST`"
if test -z "$configs"
@@ -272,7 +272,7 @@ fi
if test -z "$resdir"
then
- resdir=$KVM/res
+ resdir=$RCUTORTURE/res
fi
# Create a file of test-name/#cpus pairs, sorted by decreasing #cpus.
@@ -386,7 +386,7 @@ END {
# Generate a script to execute the tests in appropriate batches.
cat << ___EOF___ > $T/script
CONFIGFRAG="$CONFIGFRAG"; export CONFIGFRAG
-KVM="$KVM"; export KVM
+RCUTORTURE="$RCUTORTURE"; export RCUTORTURE
PATH="$PATH"; export PATH
TORTURE_ALLOTED_CPUS="$TORTURE_ALLOTED_CPUS"; export TORTURE_ALLOTED_CPUS
TORTURE_BOOT_IMAGE="$TORTURE_BOOT_IMAGE"; export TORTURE_BOOT_IMAGE
@@ -569,7 +569,7 @@ ___EOF___
awk < $T/cfgcpu.pack \
-v TORTURE_BUILDONLY="$TORTURE_BUILDONLY" \
-v CONFIGDIR="$CONFIGFRAG/" \
- -v KVM="$KVM" \
+ -v RCUTORTURE="$RCUTORTURE" \
-v ncpus=$cpus \
-v jitter="$jitter" \
-v rd=$resdir/$ds/ \
diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
index d1cb60085d8f2..e00e60efb2310 100755
--- a/tools/testing/selftests/rcutorture/bin/torture.sh
+++ b/tools/testing/selftests/rcutorture/bin/torture.sh
@@ -13,8 +13,8 @@
scriptname=$0
args="$*"
-KVM="`pwd`/tools/testing/selftests/rcutorture"; export KVM
-PATH=${KVM}/bin:$PATH; export PATH
+RCUTORTURE="`pwd`/tools/testing/selftests/rcutorture"; export RCUTORTURE
+PATH=${RCUTORTURE}/bin:$PATH; export PATH
. functions.sh
TORTURE_ALLOTED_CPUS="`identify_qemu_vcpus`"
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