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Subject: [PVE-User] QEMU crash with dpdk 22.11 app on Proxmox 8
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From: "Knight, Joshua" <Joshua.Knight@netscout.com>
To: "pve-user@lists.proxmox.com" <pve-user@lists.proxmox.com>
Subject: QEMU crash with dpdk 22.11 app on Proxmox 8
Thread-Topic: QEMU crash with dpdk 22.11 app on Proxmox 8
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Date: Wed, 28 Aug 2024 14:56:48 +0000
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We are seeing an issue on Proxmox 8 hosts where the underlying QEMU process=
for a guest will crash while starting a DPDK application in the guest.
* Proxmox 8.2.4 with QEMU 9.0.2-2
* Guest running Ubuntu 22.04, application is dpdk 22.11 testpmd
* Using virtio network interfaces that are up/connected
* Binding interfaces with the (legacy) igb_uio driver
When starting the application, the VM ssh connection will disconnect and th=
e VM will be powered off in the ui.
root@karma06:~/dpdk-22.11# python3 /root/dpdk-22.11/res/usr/local/bin/dpdk-=
devbind.py --bind=3Digb_uio enp6s20
root@karma06:~/dpdk-22.11# python3 /root/dpdk-22.11/res/usr/local/bin/dpdk-=
devbind.py --bind=3Digb_uio enp6s21
root@karma06:~/dpdk-22.11# python3 /root/dpdk-22.11/res/usr/local/bin/dpdk-=
devbind.py --bind=3Digb_uio enp6s22
root@karma06:~/dpdk-22.11# python3 /root/dpdk-22.11/res/usr/local/bin/dpdk-=
devbind.py --bind=3Digb_uio enp6s23
root@karma06:~/dpdk-22.11# /root/dpdk-22.11/res/usr/local/bin/dpdk-testpmd =
-- -i --port-topology=3Dchained --rxq=3D1 --txq=3D1 --rss-ip
EAL: Detected CPU lcores: 6
EAL: Detected NUMA nodes: 1
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: VFIO support initialized
EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:06:12.0 (socket =
-1)
eth_virtio_pci_init(): Failed to init PCI device
EAL: Requested device 0000:06:12.0 cannot be used
EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:06:13.0 (socket =
-1)
eth_virtio_pci_init(): Failed to init PCI device
EAL: Requested device 0000:06:13.0 cannot be used
EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:06:14.0 (socket =
-1)
EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:06:15.0 (socket =
-1)
EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:06:16.0 (socket =
-1)
EAL: Probe PCI driver: net_virtio (1af4:1000) device: 0000:06:17.0 (socket =
-1)
TELEMETRY: No legacy callbacks, legacy socket not created
Interactive-mode selected
Warning: NUMA should be configured manually by using --port-numa-config and=
--ring-numa-config parameters along with --numa.
testpmd: create a new mbuf pool <mb_pool_0>: n=3D187456, size=3D2176, socke=
t=3D0
testpmd: preferred mempool ops selected: ring_mp_mc
Configuring Port 0 (socket 0)
client_loop: send disconnect: Broken pipe
A QEMU assertion is seen in the host=92s system log. Using GDB we can see t=
hat QEMU is aborted.
karma QEMU[27334]: kvm: ../accel/kvm/kvm-all.c:1836: kvm_irqchip_commit_rou=
tes: Assertion `ret =3D=3D 0' failed.
Thread 10 "CPU 0/KVM" received signal SIGABRT, Aborted.
[Switching to Thread 0x7d999cc006c0 (LWP 36256)]
__pthread_kill_implementation (threadid=3D<optimized out>, signo=3Dsigno@en=
try=3D6, no_tid=3Dno_tid@entry=3D0) at ./nptl/pthread_kill.c:44
44 ./nptl/pthread_kill.c: No such file or directory.
(gdb) bt
#0 __pthread_kill_implementation (threadid=3D<optimized out>, signo=3Dsign=
o@entry=3D6, no_tid=3Dno_tid@entry=3D0) at ./nptl/pthread_kill.c:44
#1 0x00007d99a10a9e8f in __pthread_kill_internal (signo=3D6, threadid=3D<o=
ptimized out>) at ./nptl/pthread_kill.c:78
#2 0x00007d99a105afb2 in __GI_raise (sig=3Dsig@entry=3D6) at ../sysdeps/po=
six/raise.c:26
#3 0x00007d99a1045472 in __GI_abort () at ./stdlib/abort.c:79
#4 0x00007d99a1045395 in __assert_fail_base (fmt=3D0x7d99a11b9a90 "%s%s%s:=
%u: %s%sAssertion `%s' failed.\n%n",
assertion=3Dassertion@entry=3D0x5a9eb5a20f5e "ret =3D=3D 0", file=3Dfil=
e@entry=3D0x5a9eb5a021a5 "../accel/kvm/kvm-all.c", line=3Dline@entry=3D1836=
,
function=3Dfunction@entry=3D0x5a9eb5a03ca0 <__PRETTY_FUNCTION__.23> "kv=
m_irqchip_commit_routes") at ./assert/assert.c:92
#5 0x00007d99a1053eb2 in __GI___assert_fail (assertion=3Dassertion@entry=
=3D0x5a9eb5a20f5e "ret =3D=3D 0",
file=3Dfile@entry=3D0x5a9eb5a021a5 "../accel/kvm/kvm-all.c", line=3Dlin=
e@entry=3D1836,
function=3Dfunction@entry=3D0x5a9eb5a03ca0 <__PRETTY_FUNCTION__.23> "kv=
m_irqchip_commit_routes") at ./assert/assert.c:101
#6 0x00005a9eb566248c in kvm_irqchip_commit_routes (s=3D0x5a9eb79eed10) at=
../accel/kvm/kvm-all.c:1836
#7 kvm_irqchip_commit_routes (s=3D0x5a9eb79eed10) at ../accel/kvm/kvm-all.=
c:1821
#8 0x00005a9eb540bed2 in virtio_pci_one_vector_unmask (proxy=3Dproxy@entry=
=3D0x5a9eb9f5ada0, queue_no=3Dqueue_no@entry=3D4294967295,
vector=3Dvector@entry=3D0, msg=3D..., n=3D0x5a9eb9f63368) at ../hw/virt=
io/virtio-pci.c:991
#9 0x00005a9eb540c09c in virtio_pci_vector_unmask (dev=3D0x5a9eb9f5ada0, v=
ector=3D0, msg=3D...) at ../hw/virtio/virtio-pci.c:1056
#10 0x00005a9eb536ff62 in msix_fire_vector_notifier (is_masked=3Dfalse, vec=
tor=3D0, dev=3D0x5a9eb9f5ada0) at ../hw/pci/msix.c:120
#11 msix_handle_mask_update (dev=3D0x5a9eb9f5ada0, vector=3D0, was_masked=
=3D<optimized out>) at ../hw/pci/msix.c:140
#12 0x00005a9eb5602260 in memory_region_write_accessor (mr=3D0x5a9eb9f5b3e0=
, addr=3D12, value=3D<optimized out>, size=3D4, shift=3D<optimized out>,
mask=3D<optimized out>, attrs=3D...) at ../system/memory.c:497
#13 0x00005a9eb5602f4e in access_with_adjusted_size (addr=3Daddr@entry=3D12=
, value=3Dvalue@entry=3D0x7d999cbfae58, size=3Dsize@entry=3D4,
access_size_min=3D<optimized out>, access_size_max=3D<optimized out>, a=
ccess_fn=3D0x5a9eb56021e0 <memory_region_write_accessor>,
mr=3D<optimized out>, attrs=3D...) at ../system/memory.c:573
#14 0x00005a9eb560403c in memory_region_dispatch_write (mr=3Dmr@entry=3D0x5=
a9eb9f5b3e0, addr=3Daddr@entry=3D12, data=3D<optimized out>,
op=3D<optimized out>, attrs=3Dattrs@entry=3D...) at ../system/memory.c:=
1528
#15 0x00005a9eb560b95f in flatview_write_continue_step (attrs=3Dattrs@entry=
=3D..., buf=3Dbuf@entry=3D0x7d99a3433028 "", mr_addr=3D12,
l=3Dl@entry=3D0x7d999cbfaf80, mr=3D0x5a9eb9f5b3e0, len=3D4) at ../syste=
m/physmem.c:2713
#16 0x00005a9eb560bbed in flatview_write_continue (mr=3D<optimized out>, l=
=3D<optimized out>, mr_addr=3D<optimized out>, len=3D4, ptr=3D0xfdf8500c,
attrs=3D..., addr=3D4260909068, fv=3D0x7d8d6c0796b0) at ../system/physm=
em.c:2743
#17 flatview_write (fv=3D0x7d8d6c0796b0, addr=3Daddr@entry=3D4260909068, at=
trs=3Dattrs@entry=3D..., buf=3Dbuf@entry=3D0x7d99a3433028, len=3Dlen@entry=
=3D4)
at ../system/physmem.c:2774
#18 0x00005a9eb560f251 in address_space_write (len=3D4, buf=3D0x7d99a343302=
8, attrs=3D..., addr=3D4260909068, as=3D0x5a9eb66f1f20 <address_space_memor=
y>)
at ../system/physmem.c:2894
#19 address_space_rw (as=3D0x5a9eb66f1f20 <address_space_memory>, addr=3D42=
60909068, attrs=3Dattrs@entry=3D..., buf=3Dbuf@entry=3D0x7d99a3433028, len=
=3D4,
is_write=3D<optimized out>) at ../system/physmem.c:2904
#20 0x00005a9eb56660e8 in kvm_cpu_exec (cpu=3Dcpu@entry=3D0x5a9eb81e6890) a=
t ../accel/kvm/kvm-all.c:2917
#21 0x00005a9eb56676d5 in kvm_vcpu_thread_fn (arg=3Darg@entry=3D0x5a9eb81e6=
890) at ../accel/kvm/kvm-accel-ops.c:50
#22 0x00005a9eb581dfe8 in qemu_thread_start (args=3D0x5a9eb81ee390) at ../u=
til/qemu-thread-posix.c:541
#23 0x00007d99a10a8134 in start_thread (arg=3D<optimized out>) at ./nptl/pt=
hread_create.c:442
#24 0x00007d99a11287dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/cl=
one3.S:81
One thing that=92s interesting about this backtrace is it seems to exactly =
match an existing issue in QEMU that claims to be patched, and that patch s=
hould be present in QEMU 9.0.2, the version running on this Proxmox host.
https://gitlab.com/qemu-project/qemu/-/issues/1928
We=92ve found a workaround by switching from the deprecated igb_uio driver =
to the vfio-pci driver when binding the interfaces for dpdk. In this case t=
he VM does not crash. But I=92m wondering if anyone has hit this before or =
if it=92s a known issue. I would certainly not expect any operation in the=
guest to cause QEMU to crash. It=92s also odd that the crash seen claims t=
o be patched in 9.0.2.
We=92ve been able to reproduce this on Proxmox 8.0, 8.1, 8.2 on both AMD an=
d Intel processors. The crash does not occur on earlier releases such as Pr=
oxmox 6.4, and does not occur with earlier dpdk versions such as 20.08.
Thanks,
Josh
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