To reproduce (on an 8 CPU VM): sudo apt-get update && sudo apt-get dist-upgrade sudo apt-get build-dep stress-ng git clone git://kernel.ubuntu.com/cking/stress-ng cd stress-ng make sudo ./stress-ng --vm-segv 0 -t 10 -v
Comment out a ptrace line and rebuild and re-run and the hang does not occur. So it's ptrace releated. diff --git a/stress-vm-segv.c b/stress-vm-segv.c index 39e4cbeb..54d590cd 100644 --- a/stress-vm-segv.c +++ b/stress-vm-segv.c @@ -129,7 +129,7 @@ kill_child: stress_process_dumpable(false); #if defined(HAVE_PTRACE) - (void)ptrace(PTRACE_TRACEME); + //(void)ptrace(PTRACE_TRACEME); kill(getpid(), SIGSTOP); #endif (void)sigemptyset(&set); -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1864063 Title: vm-segv from ubuntu_stress_smoke_test failed on B Status in Stress-ng: Incomplete Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Incomplete Bug description: Issue found on node onibi, with kernel 4.15.0-89.89/ 4.15.0-89.89~16.04.1 Reproduce rate: 2/2 on generic kernel, 2/2 on lowlatency kernel, 2/2 on X-hwe generic kernel Test hang with vm-segv: 05:58:36 DEBUG| [stdout] vm-addr PASSED 05:58:36 DEBUG| [stdout] vm-rw STARTING 05:58:41 DEBUG| [stdout] vm-rw RETURNED 0 05:58:41 DEBUG| [stdout] vm-rw PASSED 05:58:41 DEBUG| [stdout] vm-segv STARTING + ARCHIVE=/var/lib/jenkins/jobs/smoke__B_amd64-generic__using_onibi__for_kernel/builds/2/archive + scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=quiet -r ubuntu@onibi:kernel-test-results /var/lib/jenkins/jobs/smoke__B_amd64-generic__using_onibi__for_kernel/builds/2/archive To manage notifications about this bug go to: https://bugs.launchpad.net/stress-ng/+bug/1864063/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp