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<div class="moz-cite-prefix">On 1/7/20 2:46 PM, Anshuman Khandual
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:490e77d6-a3ef-dd70-4c29-b90234f8a13d@arm.com">
<pre class="moz-quote-pre" wrap="">On 12/27/2019 07:52 PM, kernel test robot wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">[ 9.781974] kernel BUG at include/linux/mm.h:592!
[ 9.782810] invalid opcode: 0000 [#1] PTI
[ 9.783443] CPU: 0 PID: 1 Comm: swapper Not tainted 5.5.0-rc3-00001-g87c4696d57b5e #1
[ 9.784528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 9.785756] EIP: __free_pages+0x14/0x40
[ 9.786442] Code: 0c 9c 5e fa 89 d8 e8 5b f3 ff ff 56 9d 5b 5e 5d c3 8d 74 26 00 90 8b 48 1c 55 89 e5 85 c9 75 16 ba b4 b6 84 d6 e8 ac 49 fe ff <0f> 0b 8d b4 26 00 00 00 00 8d 76 00 ff 48 1c 75 10 85 d2 75 07 e8
[ 9.789697] EAX: d68761f7 EBX: ea52f000 ECX: ea4f8520 EDX: d684b6b4
[ 9.790850] ESI: 00000000 EDI: ef45e000 EBP: ea501f08 ESP: ea501f08
[ 9.791879] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010286
[ 9.792783] CR0: 80050033 CR2: ffffffff CR3: 16d00000 CR4: 000406b0
[ 9.792783] Call Trace:
[ 9.792783] free_pages+0x3c/0x50
[ 9.792783] pgd_free+0x5a/0x170
[ 9.792783] __mmdrop+0x42/0xe0
[ 9.792783] debug_vm_pgtable+0x54f/0x567
[ 9.792783] kernel_init_freeable+0x90/0x1e3
[ 9.792783] ? rest_init+0xf0/0xf0
[ 9.792783] kernel_init+0x8/0xf0
[ 9.792783] ret_from_fork+0x19/0x24
[ 9.792783] Modules linked in:
[ 9.792803] ---[ end trace 91b7335adcf0b656 ]---
To reproduce:
# build kernel
cd linux
cp config-5.5.0-rc3-00001-g87c4696d57b5e .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 olddefconfig prepare modules_prepare bzImage
git clone <a class="moz-txt-link-freetext" href="https://github.com/intel/lkp-tests.git">https://github.com/intel/lkp-tests.git</a>
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
Hello,
As the failure might be happening during boot when the test executes,
do we really need to run these LKP based QEMU environment in order to
reproduce the problem ? Could not this be recreated on a standalone
system.
- Anshuman
</pre>
</blockquote>
<br>
Hi Anshuman,<br>
<br>
Thanks for your advice, we provided another reproduce method which
is in the end of dmesg.xz file attached in original report:<br>
but the initrd file need to be supplied.<br>
<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-0 256G<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-1 256G<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-2 256G<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-3 256G<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-4 256G<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-5 256G<br>
qemu-img create -f qcow2 disk-vm-snb-89942dcb126f-6 256G<br>
<br>
kvm=(<br>
› qemu-system-x86_64<br>
› -enable-kvm<br>
› -cpu SandyBridge<br>
› -kernel $kernel<br>
› -initrd initrd-vm-snb-89942dcb126f<br>
› -m 8192<br>
› -smp 2<br>
› -device e1000,netdev=net0<br>
› -netdev user,id=net0,hostfwd=tcp::32032-:22<br>
› -boot order=nc<br>
› -no-reboot<br>
› -watchdog i6300esb<br>
› -watchdog-action debug<br>
› -rtc base=localtime<br>
› -drive file=disk-vm-snb-89942dcb126f-0,media=disk,if=virtio<br>
› -drive file=disk-vm-snb-89942dcb126f-1,media=disk,if=virtio<br>
› -drive file=disk-vm-snb-89942dcb126f-2,media=disk,if=virtio<br>
› -drive file=disk-vm-snb-89942dcb126f-3,media=disk,if=virtio<br>
› -drive file=disk-vm-snb-89942dcb126f-4,media=disk,if=virtio<br>
› -drive file=disk-vm-snb-89942dcb126f-5,media=disk,if=virtio<br>
› -drive file=disk-vm-snb-89942dcb126f-6,media=disk,if=virtio<br>
› -serial stdio<br>
› -display none<br>
› -monitor null<br>
)<br>
<br>
append=(<br>
› ip=::::vm-snb-89942dcb126f::dhcp<br>
› root=/dev/ram0<br>
› user=lkp<br>
› job=/job-script<br>
›
ARCH=i386
<br>
› kconfig=i386-randconfig-h001-20191225<br>
› branch=linux-devel/devel-hourly-2019122518<br>
› commit=87c4696d57b5e380bc2720fdff0772b042462b7d<br>
›
BOOT_IMAGE=/pkg/linux/i386-randconfig-h001-20191225/gcc-7/87c4696d57b5e380bc2720fdff0772b042462b7d/vmlinuz-5.5.0-rc3-00001-g87c4696d57b5e<br>
› max_uptime=1500<br>
›
RESULT_ROOT=/result/trinity/300s/vm-snb/yocto-minimal-i386-2019-05-20.cgz/i386-randconfig-h001-20191225/gcc-7/87c4696d57b5e380bc2720fdff0772b042462b7d/8<br>
› result_service=tmpfs<br>
› debug<br>
› apic=debug<br>
› sysrq_always_enabled<br>
› rcupdate.rcu_cpu_stall_timeout=100<br>
› net.ifnames=0<br>
› printk.devkmsg=on<br>
› panic=-1<br>
› softlockup_panic=1<br>
› nmi_watchdog=panic<br>
› oops=panic<br>
› load_ramdisk=2<br>
› prompt_ramdisk=0<br>
› drbd.minor_count=8<br>
› systemd.log_level=err<br>
› ignore_loglevel<br>
› console=tty0<br>
› earlyprintk=ttyS0,115200<br>
› console=ttyS0,115200<br>
› vga=normal<br>
› rw<br>
› rcuperf.shutdown=0<br>
› watchdog_thresh=60<br>
)<br>
<br>
"${kvm[@]}" -append "${append[*]}"<br>
<br>
<br>
We <span style="color: rgb(51, 51, 51); font-family: -apple-system,
"PingFang SC", "Helvetica Neue", STHeiti,
"Microsoft Yahei", Tahoma, sans-serif; font-size: 16px;
font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255); text-decoration-style:
initial; text-decoration-color: initial; display: inline
!important; float: none;">will definitely give serious thought to
your suggestion.</span><br>
<br>
Best Regards,<br>
Rong Chen<br>
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