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Diffstat (limited to '')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1867786 | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1867786 b/results/scraper/launchpad-without-comments/1867786 new file mode 100644 index 00000000..4b76d500 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1867786 @@ -0,0 +1,27 @@ +Qemu PPC64 freezes with multi-core CPU + +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=8e2/1/0x4000000000000004 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/. +[ 980.111177] 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=8e2/1/0x4000000000000004 softirq=5957/5960 fqs=9342 +``` + +If I change to 1 core on the command line, I haven't seen these freezes.
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