Re: [LKP] [xarray] 4e99d4e957: BUG:soft_lockup-CPU##stuck_for#s

[Rong Chen]

On 12/19/2018 05:54 PM, Rong Chen wrote:
> On 12/11/2018 10:29 PM, Matthew Wilcox wrote:
> > On Tue, Dec 11, 2018 at 05:54:41PM +0800, kernel test robot wrote:
> > > # To reproduce,
> > > # 1) save job-script and this script (both are attached in 0day 
> > > report email)
> > > # 2) run this script with your compiled kernel and optional env 
> > > $INSTALL_MOD_PATH
> > >
> > > kernel=$1
> > >
> > > initrds=(
> > > ÂÂÂÂ/osimage/yocto/yocto-tiny-i386-2016-04-22.cgz
> > > ÂÂÂÂ/lkp/lkp/lkp-i386.cgz
> > > ÂÂÂÂ/osimage/deps/debian-x86_64-2016-08-31.cgz/run-ipconfig.i386_2016-09-03.cgz 
> > >
> > > )
> > >
> > > HTTP_PREFIX=https://download.01.org/0day-ci/lkp-qemu
> > > wget --timestamping "${initrds[@]/#/$HTTP_PREFIX}"
> > >
> > > {
> > > ÂÂÂÂcat "${initrds[@]//*\//}"
> > > ÂÂÂÂ[[ $INSTALL_MOD_PATH ]] && (
> > > ÂÂÂÂÂÂÂ cd "$INSTALL_MOD_PATH"
> > >
> > >
> > > To reproduce:
> > >
> > > ÂÂÂÂÂÂÂÂ git clone https://github.com/intel/lkp-tests.git
> > > ÂÂÂÂÂÂÂÂ cd lkp-tests
> > > ÂÂÂÂÂÂÂÂ bin/lkp qemu -k <bzImage> job-script # job-script is 
> > > attached in this email
> > When I do this, the only output I get is:
> >
> > make: Entering directory '/home/willy/kernel/lkp-tests/bin/event'
> > gccÂÂÂ -c -o wakeup.o wakeup.c
> > gcc -static -o wakeup wakeup.o
> > rm -f wakeup.o
> > strip wakeup
> > make: Leaving directory '/home/willy/kernel/lkp-tests/bin/event'
> >
> > Running under sh -x, I get as far as:
> >
> > + exec /home/willy/kernel/lkp-tests/lkp-exec/qemu -k 
> > ../idrext/.build-yocto/arch/x86/boot/bzImage job-script
> >
> > Editing that script to set -x, I get to:
> >
> > + /home/willy/kernel/lkp-tests/sbin/pack -f -a x86_64 lkp-src
> > make: Entering directory '/home/willy/kernel/lkp-tests/bin/event'
> > gccÂÂÂ -c -o wakeup.o wakeup.c
> > gcc -static -o wakeup wakeup.o
> > rm -f wakeup.o
> > strip wakeup
> > make: Leaving directory '/home/willy/kernel/lkp-tests/bin/event'
> > + exit
> >
> > which would seem to indicate your 'pack' command failed with a non-zero
> > exit code? Adding set -x to _that_ script gives me:
> >
> > + find . -type d -exec chmod g+rwx '{}' ';'
> > + chmod -R g+rw etc lib root usr
> > + '[' -d /osimage/addon-x86_64 ']'
> > + gzip -n -9 /home/willy/.lkp/cache/lkp-x86_64.cpio
> > + mv -f /home/willy/.lkp/cache/lkp-x86_64.cpio.gz 
> > /home/willy/.lkp/cache/lkp-x86_64.cgz
> > + [[ -n '' ]]
> > + [[ -n '' ]]
> > + exit
> >
> > I'm using your top-of-tree lkp-tests, commit
> > e28c726dfe85e3e595ba4776a4eb92f2559d3ac0
> >
> > By the way, I took this kernel config and ran it under one of your other
> > test cases (the one which runs Trinity) and didn't see a boot problem,
> > so either it's something specific to this setup, or the problem got
> > fixed between this commit and current top-of-tree.
>
> Please accept my apologies for taking your time, the reproduce tool 
> was broken for a long time, and it's fixed now.
> if it can't be reproduced, here is the original 
> bzImage(https://download.01.org/0day-ci/lkp-qemu/fbc/4e99d4e9579d3b950bf4b38d0d64eb1b9be78761/).

Hi,

It should be a false positive too, The test VM are usually overloaded 
much to improve test density, we will pay attention to the issue.

Best Regards,
Rong Chen