[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
Expired
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
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[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch
the state back to "New" within the next 60 days, otherwise this report
will be marked as "Expired". Or please mark it as "Fix Released" if
the problem has been solved with a newer version of QEMU already.
Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
Incomplete
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Hi Laurent, confirm that after changing the network adapter to the
e1000e it worked flawlessly for hours with 4 cores on Macbook Pro.
Thanks!
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https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
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[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Could you try to change the network card, with something like "-device
e1000e,netdev=network01" or "-device virtio-net-pci,netdev=network01" or
"-device spapr-vlan,netdev=network01"?
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
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[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
I just built from latest master and got the kernel trace below.
❯ qemu-system-ppc64 --version
QEMU emulator version 4.2.90 (v4.2.0-2811-g83019e81d1-dirty)
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,hostfwd=tcp::$LocalSSHPort-:22 -device
rtl8139,netdev=network01 \
[ 376.219450] watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [swapper/3:0]
[ 376.226712] Modules linked in: ctr(E) vmx_crypto(E) gf128mul(E) sunrpc(E)
ip_tables(E) x_tables(E) autofs4(E) ext4(E) crc16(E) mbcache(E) jbd2(E)
crc32c_generic(E) virtio_blk(E) 8139too(E) virtio_pci(E) virtio_ring(E)
8139cp(E) virtio(E) mii(E)
[ 376.235692] CPU: 3 PID: 0 Comm: swapper/3 Tainted: GE
5.5.0-rc5-powerpc64le #1 Debian 5.5~rc5-1~exp1
[ 376.236245] NIP: c000af8c LR: c0019664 CTR: c0af2c80
[ 376.236365] REGS: c000fffcf920 TRAP: 0901 Tainted: GE
(5.5.0-rc5-powerpc64le Debian 5.5~rc5-1~exp1)
[ 376.236376] MSR: 80009033 CR: 44002248
XER:
[ 376.236479] CFAR: c0af2ce0 IRQMASK: 0
GPR00: c0af2e38 c000fffcfbb0 c1365700
0500
GPR04: fef9 002be1f69c00 002beaa729fa
c000fffec880
GPR08: 0004 80ff 0001
c008004c6ff0
GPR12: 2000 c000fffec880
[ 376.238452] NIP [c000af8c] replay_interrupt_return+0x0/0x4
[ 376.238488] LR [c0019664] arch_local_irq_restore.part.0+0x54/0x70
[ 376.238984] Call Trace:
[ 376.240707] [c000fffcfbb0] [c08ce910]
napi_gro_receive+0x1e0/0x210 (unreliable)
[ 376.240824] [c000fffcfbd0] [c0af2e38]
_raw_spin_unlock_irqrestore+0x98/0xb0
[ 376.242114] [c000fffcfbf0] [c008004c5588] cp_rx_poll+0x580/0x610
[8139cp]
[ 376.242131] [c000fffcfcf0] [c08cf6c8] net_rx_action+0x1f8/0x550
[ 376.242139] [c000fffcfe10] [c0af3a8c] __do_softirq+0x16c/0x3d8
[ 376.242172] [c000fffcff30] [c01329e8] irq_exit+0xd8/0x120
[ 376.242181] [c000fffcff60] [c0019fb4] __do_irq+0x84/0x1c0
[ 376.242193] [c000fffcff90] [c002cbec] call_do_irq+0x14/0x24
[ 376.242201] [c000fd4b7980] [c001a178] do_IRQ+0x88/0xf0
[ 376.242209] [c000fd4b79c0] [c0008d98]
hardware_interrupt_common+0x158/0x160
[ 376.242243] --- interrupt: 501 at plpar_hcall_norets+0x1c/0x28
LR = check_and_cede_processor+0x48/0x60
[ 376.243892] [c000fd4b7cc0] [c000fd4b7cf0] 0xc000fd4b7cf0
(unreliable)
[ 376.243922] [c000fd4b7d20] [c086c710] shared_cede_loop+0x50/0x160
[ 376.243942] [c000fd4b7d50] [c0868844]
cpuidle_enter_state+0xa4/0x590
[ 376.243953] [c000fd4b7dd0] [c0868dcc] cpuidle_enter+0x4c/0x70
[ 376.243983] [c000fd4b7e10] [c0177d4c] call_cpuidle+0x4c/0x90
[ 376.243991] [c000fd4b7e30] [c0178358] do_idle+0x2f8/0x400
[ 376.243998] [c000fd4b7ed0] [c01786a8] cpu_startup_entry+0x38/0x40
[ 376.244011] [c000fd4b7f00] [c004e910] start_secondary+0x640/0x670
[ 376.244020] [c000fd4b7f90] [c000b354]
start_secondary_prolog+0x10/0x14
[ 376.244093] Instruction dump:
[ 376.244751] 7d200026 618c8000 2c030900 4182e348 2c030500 4182dcd0 2c030f00
4182f318
[ 376.244797] 2c030a00 4182ffc8 6000 6000 <4e800020> 7c781b78 480003d9
480003f1
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Hi, any news about this? Can I provide any additional info since it might be a
Mac issue.
Thanks
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Hi Laurent, I'm on a MacOS Mojave running Qemu installed by homebrew
from master branch on the day I've opened the bug.
The option to install was: `brew install --HEAD qemu -s --verbose`.
Maybe it's a Mac related problem?
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
I'm not able to reproduce (kernel 4.19.0-8-powerpc64le, qemu id
d649689a8ecb)
What is the kernel version in the guest?
What is the QEMU commit id you used to test with 4.2.50?
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Thank you for the test. I'm going to try to reproduce the problem and
bisect.
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
I just reverted to 4.2.0 and it works fine. No freezes for the past
hour.
❯ qemu-system-ppc64 --version
QEMU emulator version 4.2.0
Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers
Couldn't bisect to find the bad commit.
Carlos
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Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Do you have the problem with 4.2.0?
Can you identify the commit introducing the problem?
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
It's soft emulation, running Qemu 4.2.50 (from master branch) on MacOS
Mojave.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
Is this with KVM or with TCG?
What is your hardware configuration?
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
[Bug 1867786] Re: Qemu PPC64 freezes with multi-core CPU
** Tags added: ppc
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1867786
Title:
Qemu PPC64 freezes with multi-core CPU
Status in QEMU:
New
Bug description:
I installed Debian 10 on a Qemu PPC64 VM running with the following
flags:
qemu-system-ppc64 \
-nographic -nodefaults -monitor pty -serial stdio \
-M pseries -cpu POWER9 -smp cores=4,threads=1 -m 4G \
-drive file=debian-ppc64el-qemu.qcow2,format=qcow2,if=virtio \
-netdev user,id=network01,$ports -device rtl8139,netdev=network01 \
Within a couple minutes on any operation (could be a Go application or simply
changing the hostname with hostnamectl, the VM freezes and prints this on the
console:
```
root@debian:~# [ 950.428255] rcu: INFO: rcu_sched self-detected stall on CPU
[ 950.428453] rcu: 3-: (5318 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=2544
[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [zsh:462]
Message from syslogd@debian at Mar 17 11:35:24 ...
kernel:[ 976.244481] watchdog: BUG: soft lockup - CPU#3 stuck for 23s!
[zsh:462]
[ 980.110018] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks:
{ 3-... } 5276 jiffies s: 93 root: 0x8/.
[ 980.77] rcu: blocking rcu_node structures:
[ 1013.442268] rcu: INFO: rcu_sched self-detected stall on CPU
[ 1013.442365] rcu: 3-: (21071 ticks this GP)
idle=8e2/1/0x4004 softirq=5957/5960 fqs=9342
```
If I change to 1 core on the command line, I haven't seen these
freezes.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1867786/+subscriptions
