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', 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. Thanks Zhouyi On Wed, Jan 26, 2022 at 9:59 AM Zhouyi Zhou <zhouzhouyi@xxxxxxxxx> wrote: > > Thank Paul for your attention > > On Wed, Jan 26, 2022 at 2:09 AM Paul E. McKenney <paulmck@xxxxxxxxxx> wrote: > > > > On Wed, Jan 26, 2022 at 12:19:58AM +0800, Zhouyi Zhou wrote: > > > Hi Paul > > > > > > On Fri, Jan 21, 2022 at 8:44 AM Zhouyi Zhou <zhouzhouyi@xxxxxxxxx> wrote: > > > > > > > > Thank Paul for your guidance! > > > > > > > > On Fri, Jan 21, 2022 at 5:06 AM Paul E. McKenney <paulmck@xxxxxxxxxx> wrote: > > > > > > > > > > On Thu, Jan 20, 2022 at 03:30:54AM +0800, Zhouyi Zhou wrote: > > > > > > On Thu, Jan 20, 2022 at 2:21 AM Paul E. McKenney <paulmck@xxxxxxxxxx> wrote: > > > > > > > > > > > > > > On Tue, Jan 18, 2022 at 08:46:49PM -0800, Paul E. McKenney wrote: > > > > > > > > On Wed, Jan 19, 2022 at 10:07:42AM +0800, Zhouyi Zhou wrote: > > > > > > > > > Thanks Paul for looking into this > > > > > > > > > > > > > > > > > > On Wed, Jan 19, 2022 at 7:46 AM Paul E. McKenney <paulmck@xxxxxxxxxx> wrote: > > > > > > > > > > > > > > > > > > > > On Tue, Jan 18, 2022 at 09:29:04AM -0800, Paul E. McKenney wrote: > > > > > > > > > > > On Tue, Jan 18, 2022 at 08:56:24AM +0100, Paul Menzel wrote: > > > > > > > > > > > > Dear Zhouyi, > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Thank you for your quick response. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Am 18.01.22 um 08:34 schrieb Zhouyi Zhou: > > > > > > > > > > > > > > > > > > > > > > > > > I have studied the rcu torture test recently. I am also interested in > > > > > > > > > > > > > this topic. > > > > > > > > > > > > > But I can't open > > > > > > > > > > > > > [1]: https://owww.molgen.mpg.de/~pmenzel/allmodconf-Make.out.txt > > > > > > > > > > > > > [2]: https://owww.molgen.mpg.de/~pmenzel/rcutorture-log.txt > > > > > > > > > > > > > > > > > > > > > > > > Sorry, about that. I should have checked those. I had put them into a > > > > > > > > > > > > directory: > > > > > > > > > > > > > > > > > > > > > > > > [1]: https://owww.molgen.mpg.de/~pmenzel/rcutorture/allmodconf-Make.out.txt > > > > > > > > > > > > [2]: https://owww.molgen.mpg.de/~pmenzel/rcutorture/rcutorture-log.txt > > > > > > > > > > > > > > > > > > > > > > > > I am going to try to test your suggestions at the end of the day. > > > > > > > > > > > > > > > > > > > > > > On x86 rcutorture builds successfully. However, allmodconfig > > > > > > > > > > > on semi-recent -next got me "Can't open perl script > > > > > > > > > > > "./usr/include/headers_check.pl": No such file or directory". > > > > > > > > > > > Which might well be a local problem or might well be fixed by now. > > > > > > > > > > > > > > > > > > > > Not fixed as of next-20220118. Chasing it down... ;-) > > > > > > > > > I can do allmodconfig on -next, > > > > > > > > > $git describe > > > > > > > > > next-20220118 > > > > > > > > > $tools/testing/selftests/rcutorture/bin/torture.sh --duration 10 > > > > > > > > > --- tools/testing/selftests/rcutorture/bin/torture.sh --duration 10 > > > > > > > > > --- Results directory: 2022.01.19-09.14.39-torture > > > > > > > > > $ ps -aux|grep qemu-system > > > > > > > > > zzy 470309 773 0.3 1876544 153936 pts/0 Sl+ 09:55 31:27 > > > > > > > > > qemu-system-x86_64 -enable-kvm -nographic -smp 16 -net none -machine > > > > > > > > > q35,accel=kvm -cpu kvm64 -serial > > > > > > > > > file:/tmp/linux-next/tools/testing/selftests/rcutorture/res/2022.01.19-09.14.39-torture/results-rcutorture/TREE03/console.log > > > > > > > > > -m 512 -kernel /tmp/linux-next/tools/testing/selftests/rcutorture/res/2022.01.19-09.14.39-torture/results-rcutorture/TREE03/bzImage > > > > > > > > > -append debug_boot_weak_hash panic=-1 selinux=0 initcall_debug debug > > > > > > > > > console=ttyS0 rcupdate.rcu_cpu_stall_suppress_at_boot=1 > > > > > > > > > torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 > > > > > > > > > rcutorture.onoff_interval=200 rcutorture.onoff_holdoff=30 > > > > > > > > > rcutree.gp_preinit_delay=12 rcutree.gp_init_delay=3 > > > > > > > > > rcutree.gp_cleanup_delay=3 rcutree.kthread_prio=2 threadirqs > > > > > > > > > tree.use_softirq=0 rcutorture.n_barrier_cbs=4 > > > > > > > > > rcutorture.stat_interval=15 rcutorture.shutdown_secs=420 > > > > > > > > > rcutorture.test_no_idle_hz=1 rcutorture.verbose=1 > > > > > > > > > zzy 755865 0.0 0.0 17676 2876 pts/2 S+ 09:59 0:00 > > > > > > > > > grep --color=auto qemu-system > > > > > > > > > $ ls -l vmlinux > > > > > > > > > -rwxrwxr-x 1 zzy zzy 69349872 1月 19 09:55 vmlinux > > > > > > > > > > > > > > > > > > Could you please try the following command ? > > > > > > > > > linux-next$ perl ./usr/include/headers_check.pl usr/include x86 > > > > > > > > > usr/include/rdma/hfi/hfi1_user.h > > > > > > > > > linux-next$ echo $? > > > > > > > > > 0 > > > > > > > > > The headers_check.pl in linux-next > > > > > > > > > (https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/usr/include/headers_check.pl) > > > > > > > > > is used to check the validity of head files in ./usr/include > > > > > > > > > > > > > > > > I am currently bisecting, but once that finishes I will give this a > > > > > > > > try, thank you! > > > > > > > > > > > > > > And the bisection converged badly due to there being more than one build > > > > > > > failure. > > > > > > Sorry to hear the bisection is not successful. > > > > > > > > > > > > > > So I ran the command above and then the build succeeded. > > > > > > I'm very happy that the command works. > > > > > > > > > > > > > > Though it would be good if the build worked from "make distclean"... > > > > > > I would be very honored if I could join the efforts to make the -next better.linux-next/tools/testing/selftests/rcutorture/res/2022.01.25-23.10.36-torture/allmodconfig > > > > > > > > > > One approach would be to download the -next kernels as they appear and > > > > > run tests on them. Reporting bugs is good, and of course fixing them > > > > > even better. > > > > This provides a nice way of participating the efforts to make -next > > > > better, and provides me a good way to learn new knowledge in -next! > > > > > > > > > > > > > > You can clone -next from here: > > > > > > > > > > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > > > > > > > > > > Individual -next releases are tagged, for example, "next-20220118". > > > > I will clone -next from the tree, and will download the -next releases from > > > > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > > > I cloned -next, and try to test rcu: > > > $git clone https://kernel.source.codeaurora.cn/pub/scm/linux/kernel/git/next/linux-next.git > > > (kernel.source.codeaurora.cn is Chinese mirror of git.kernel.org) > > > $cd linux-next > > > $git describe > > > next-20220125 > > > $tools/testing/selftests/rcutorture/bin/torture.sh --duration 10 > > > $cd linux-next/tools/testing/selftests/rcutorture/res/2022.01.25-23.10.36-torture/allmodconfig > > > $cat Make.exitcode > > > 2 > > > $grep Stop Make.out > > > make[2]: *** No rule to make target > > > 'arch/x86/kvm//home/zzy/Program/linux-next/linux-next/tools/testing/selftests/rcutorture/kvm_main.o', > > > needed by 'arch/x86/kvm/kvm.o'. Stop. > > > I tried the above two times in two different machines today, they all failed. > > > > > > > > > Meanwhile I can config and build the kernel successfully by invoking > > > the build commands by hand: > > > $git clone https://kernel.source.codeaurora.cn/pub/scm/linux/kernel/git/next/linux-next.git > > > $cd linux-next > > > $git describe > > > next-20220125 > > > > Huh. What happens if you do a "make clean" betweentimes? > do a "make clean" between times also fails, sorry > > > > Alternatively, what happens if you change these two lines from torture.sh: > > > > echo " --- make clean" > "$amcdir/Make.out" 2>&1 > > make -j$MAKE_ALLOTED_CPUS clean >> "$amcdir/Make.out" 2>&1 > > > > To this: > > > > echo " --- make distclean" > "$amcdir/Make.out" 2>&1 > > make -j$MAKE_ALLOTED_CPUS distclean >> "$amcdir/Make.out" 2>&1 > > > > And then run torture.sh in the same way that got you the error? > I do above, and also fails: > $git diff > diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh > b/tools/testing/selftests/rcutorture/bin/torture.sh > index d1cb60085d8f..8ece2f0a51c7 100755 > --- a/tools/testing/selftests/rcutorture/bin/torture.sh > +++ b/tools/testing/selftests/rcutorture/bin/torture.sh > @@ -319,8 +319,8 @@ then > echo " --- allmodconfig:" Start `date` | tee -a $T/log > amcdir="tools/testing/selftests/rcutorture/res/$ds/allmodconfig" > mkdir -p "$amcdir" > - echo " --- make clean" > "$amcdir/Make.out" 2>&1 > - make -j$MAKE_ALLOTED_CPUS clean >> "$amcdir/Make.out" 2>&1 > + echo " --- make distclean" > "$amcdir/Make.out" 2>&1 > + make -j$MAKE_ALLOTED_CPUS distclean >> "$amcdir/Make.out" 2>&1 > echo " --- make allmodconfig" >> "$amcdir/Make.out" 2>&1 > make -j$MAKE_ALLOTED_CPUS allmodconfig >> "$amcdir/Make.out" 2>&1 > echo " --- make " >> "$amcdir/Make.out" 2>&1 > $tools/testing/selftests/rcutorture/bin/torture.sh --duration 10 > $grep kvm.o ./tools/testing/selftests/rcutorture/res/2022.01.26-09.08.53-torture/allmodconfig/Make.out > make[2]: *** No rule to make target > 'arch/x86/kvm//home/zzy/Program/linux-next/linux-next/tools/testing/selftests/rcutorture/kvm_main.o', > needed by 'arch/x86/kvm/kvm.o'. Stop. > > I am very interested in this problem, and am willing to track this > problem with other developers in the coming days ;-) > > Thanks > Zhouyi > > > > Thanx, Paul > > > > > $make allmodconfig > > > $make -j 16 > > > Kernel: arch/x86/boot/bzImage is ready (#2) > > > GEN Module.symvers > > > $echo $? > > > 0 > > > > > > I am very interested in this problem and I am eager to try to dig out > > > what happened and fix it before this Sunday. And it is more delightful > > > to me that other developers can solve this problem because they are > > > more mature than me ;-) > > > > > > Many thanks > > > Zhouyi > > > > > > > > > > Me, I run torture.sh on them from time to time, depending on how much > > > > > other testing I am doing. So maybe once or twice a week. ;-) > > > > You are the example worth learning in my life, to be honest , I will > > > > do the same way as you do! > > > > > > > > Sincerely > > > > Zhouyi > > > > > > > > > > Thanx, Paul > > > > > > > > > > > Many thanks > > > > > > Zhouyi > > > > > > > > > > > > > > Thanx, Paul > > > > > > > > > > > > > > > > > > Either way, it looks like I need to upgrade the torture.sh script's > > > > > > > > > > > checks for failed builds. Thank you for reporting this! > > > > > > > > > > > > > > > > > > > > Does this make torture.sh more reliably report build failures? > > > > > > > > > I studied this commit line by line several times and benefited a lot. Thank you! > > > > > > > > > > > > > > > > > > > > Thanx, Paul > > > > > > > > > > > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > > > > > > > > > > > > > > > commit 0d302830515307ceb58e89d5fb91e81b6d22e0bf > > > > > > > > > > Author: Paul E. McKenney <paulmck@xxxxxxxxxx> > > > > > > > > > > Date: Tue Jan 18 15:40:49 2022 -0800 > > > > > > > > > > > > > > > > > > > > torture: Make kvm-find-errors.sh notice missing vmlinux file > > > > > > > > > > > > > > > > > > > > Currently, an obtuse compiler diagnostic can fool kvm-find-errors.sh > > > > > > > > > > into believing that the build was successful. This commit therefore > > > > > > > > > > adds a check for a missing vmlinux file. > > > > > > > > > > > > > > > > > > > > Link: https://lore.kernel.org/lkml/36bd91e4-8eda-5677-7fde-40295932a640@xxxxxxxxxxxxx/ > > > > > > > > > > Reported-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx> > > > > > > > > > > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> > > > > > > > > > > > > > > > > > > > > diff --git a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh > > > > > > > > > > index 2e9e9e2eedb69..7d3e11a6b8290 100755 > > > > > > > > > > --- a/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh > > > > > > > > > > +++ b/tools/testing/selftests/rcutorture/bin/kvm-find-errors.sh > > > > > > > > > > @@ -30,10 +30,15 @@ editor=${EDITOR-vi} > > > > > > > > > > files= > > > > > > > > > > for i in ${rundir}/*/Make.out > > > > > > > > > > do > > > > > > > > > > + scenariodir="`dirname $i`" > > > > > > > > > > if egrep -q "error:|warning:|^ld: .*undefined reference to" < $i > > > > > > > > > > then > > > > > > > > > > egrep "error:|warning:|^ld: .*undefined reference to" < $i > $i.diags > > > > > > > > > > files="$files $i.diags $i" > > > > > > > > > > + elif ! test -f ${scenariodir}/vmlinux > > > > > > > > > > + then > > > > > > > > > > + echo No ${scenariodir}/vmlinux file > $i.diags > > > > > > > > > > + files="$files $i.diags $i" > > > > > > > > > > fi > > > > > > > > > > done > > > > > > > > > > if test -n "$files" > > > > > > > > > Thanks > > > > > > > > > Zhouyi
