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Date: Fri, 9 Feb 2018 21:52:18 +0800
From: kernel test robot <fengguang.wu@...el.com>
To: Trond Myklebust <trond.myklebust@...marydata.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: 90ea9f1b60: BUG:using__this_cpu_add()in_preemptible[#]code:kworker/u5
FYI, we noticed the following commit (built with gcc-7):
commit: 90ea9f1b60c679049619a79d9fc1557bc41c4973 ("Make the xprtiod workqueue unbounded.")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: fwq
with following parameters:
nr_task: 100%
samples: 100000ss
iterations: 18x
on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-----------------------------------------------------------+------------+------------+
| | 2275cde4cc | 90ea9f1b60 |
+-----------------------------------------------------------+------------+------------+
| boot_successes | 6 | 4 |
| boot_failures | 18 | 22 |
| invoked_oom-killer:gfp_mask=0x | 18 | 18 |
| Mem-Info | 18 | 18 |
| Out_of_memory:Kill_process | 18 | 18 |
| BUG:using__this_cpu_add()in_preemptible[#]code:kworker/u5 | 0 | 17 |
| RIP:__clear_user | 0 | 1 |
+-----------------------------------------------------------+------------+------------+
[ 31.962289] BUG: using __this_cpu_add() in preemptible [00000000] code: kworker/u5:0/31
[ 31.967319] caller is xs_udp_data_receive_workfn+0x194/0x270
[ 31.973166] CPU: 1 PID: 31 Comm: kworker/u5:0 Not tainted 4.15.0-rc8-00076-g90ea9f1 #2
[ 31.976585] Workqueue: xprtiod xs_udp_data_receive_workfn
[ 31.978951] Call Trace:
[ 31.980060] dump_stack+0x85/0xc1
[ 31.981513] check_preemption_disabled+0xce/0xe0
[ 31.983556] xs_udp_data_receive_workfn+0x194/0x270
[ 31.985694] process_one_work+0x318/0x620
[ 31.987451] worker_thread+0x20a/0x390
[ 31.989108] ? process_one_work+0x620/0x620
[ 31.990941] kthread+0x120/0x130
[ 31.992368] ? __kthread_bind_mask+0x60/0x60
[ 31.994231] ret_from_fork+0x24/0x30
[ 31.997649] BUG: using __this_cpu_add() in preemptible [00000000] code: kworker/u5:0/31
[ 32.001258] caller is xs_udp_data_receive_workfn+0x194/0x270
[ 32.002451] CPU: 1 PID: 31 Comm: kworker/u5:0 Not tainted 4.15.0-rc8-00076-g90ea9f1 #2
[ 32.004083] Workqueue: xprtiod xs_udp_data_receive_workfn
[ 32.006377] Call Trace:
[ 32.007480] dump_stack+0x85/0xc1
[ 32.008944] check_preemption_disabled+0xce/0xe0
[ 32.010961] xs_udp_data_receive_workfn+0x194/0x270
[ 32.013103] process_one_work+0x318/0x620
[ 32.014917] worker_thread+0x20a/0x390
[ 32.016557] ? process_one_work+0x620/0x620
[ 32.018390] kthread+0x120/0x130
[ 32.019830] ? __kthread_bind_mask+0x60/0x60
[ 32.021501] ret_from_fork+0x24/0x30
[ 32.079255] run-job /lkp/scheduled/vm-lkp-nex04-4G-4/fwq-100%-100000ss-18x-debian-x86_64-2016-08-31.cgz-90ea9f1b60c679049619a79d9fc1557bc41c4973-20180209-29266-1lryx4f-0.yaml
[ 32.079267]
[ 32.150075] /usr/bin/curl -sSf http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/scheduled/vm-lkp-nex04-4G-4/fwq-100%25-100000ss-18x-debian-x86_64-2016-08-31.cgz-90ea9f1b60c679049619a79d9fc1557bc41c4973-20180209-29266-1lryx4f-0.yaml&job_state=running -o /dev/null
[ 32.150087]
[ 32.368198] skip microcode check for virtual machine
[ 32.368209]
[ 33.419647] 2018-02-09 21:32:40 ./t_fwq -n 100000 -w 18 -t 2
[ 33.419657]
Elapsed time: 40
#!/bin/bash
# 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=$1
initrds=(
/osimage/debian/debian-x86_64-2016-08-31.cgz
/lkp/lkp/lkp-x86_64.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/lkp_2017-12-14.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/rsync-rootfs_2016-11-15.cgz
/osimage/deps/debian-x86_64-2016-08-31.cgz/run-ipconfig_2016-11-15.cgz
/osimage/pkg/debian-x86_64-2016-08-31.cgz/fwq-x86_64-fb459a1_2017-08-19.cgz
)
HTTP_PREFIX=https://github.com/0day-ci/lkp-qemu/raw/master
wget --timestamping "${initrds[@]/#/$HTTP_PREFIX}"
{
cat "${initrds[@]//*\//}"
[[ $INSTALL_MOD_PATH ]] && (
cd "$INSTALL_MOD_PATH"
find lib | cpio -o -H newc --quiet | gzip
)
echo job-script | cpio -o -H newc --quiet | gzip
} > initrd.img
qemu-img create -f qcow2 disk-vm-lkp-nex04-4G-4-0 256G
qemu-img create -f qcow2 disk-vm-lkp-nex04-4G-4-1 256G
kvm=(
qemu-system-x86_64
-enable-kvm
-cpu host
-kernel $kernel
-initrd initrd.img
-m 4096
-smp 2
-device e1000,netdev=net0
-netdev user,id=net0,hostfwd=tcp::23233-:22
-boot order=nc
-no-reboot
-watchdog i6300esb
-watchdog-action debug
-rtc base=localtime
-drive file=disk-vm-lkp-nex04-4G-4-0,media=disk,if=virtio
-drive file=disk-vm-lkp-nex04-4G-4-1,media=disk,if=virtio
-serial stdio
-display none
-monitor null
)
append=(
ip=::::vm-lkp-nex04-4G-4::dhcp
root=/dev/ram0
user=lkp
job=/job-script
ARCH=x86_64
kconfig=x86_64-randconfig-b0-02091144
branch=linux-next/master
commit=90ea9f1b60c679049619a79d9fc1557bc41c4973
BOOT_IMAGE=/pkg/linux/x86_64-randconfig-b0-02091144/gcc-7/90ea9f1b60c679049619a79d9fc1557bc41c4973/vmlinuz-4.15.0-rc8-00076-g90ea9f1
max_uptime=3600
RESULT_ROOT=/result/fwq/100%-100000ss-18x/vm-lkp-nex04-4G/debian-x86_64-2016-08-31.cgz/x86_64-randconfig-b0-02091144/gcc-7/90ea9f1b60c679049619a79d9fc1557bc41c4973/0
result_service=tmpfs
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
printk.devkmsg=on
panic=-1
softlockup_panic=1
nmi_watchdog=panic
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
lkp
View attachment "config-4.15.0-rc8-00076-g90ea9f1" of type "text/plain" (120529 bytes)
View attachment "job-script" of type "text/plain" (3971 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (17488 bytes)
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