Captured the hard lock on the following (gdb) stepi 0xffffffff8c4e29e5 in ?? () => 0xffffffff8c4e29e5: eb ec jmp 0xffffffff8c4e29d3 (gdb) stepi 0xffffffff8c4e29d3 in ?? () => 0xffffffff8c4e29d3: 8b 07 mov (%rdi),%eax (gdb) stepi 0xffffffff8c4e29d5 in ?? () => 0xffffffff8c4e29d5: 85 c0 test %eax,%eax (gdb) stepi 0xffffffff8c4e29d7 in ?? () => 0xffffffff8c4e29d7: 75 0a jne 0xffffffff8c4e29e3 (gdb) stepi 0xffffffff8c4e29e3 in ?? () => 0xffffffff8c4e29e3: f3 90 pause (gdb) stepi 0xffffffff8c4e29e5 in ?? () => 0xffffffff8c4e29e5: eb ec jmp 0xffffffff8c4e29d3
This maps to: ffffffff810e29c0 <native_queued_spin_lock_slowpath>: .... ffffffff810e29d3: 8b 07 mov (%rdi),%eax ffffffff810e29d5: 85 c0 test %eax,%eax ffffffff810e29d7: 75 0a jne ffffffff810e29e3 <native_queued_spin_lock_slowpath+0x23> ffffffff810e29d9: f0 0f b1 17 lock cmpxchg %edx,(%rdi) ffffffff810e29dd: 85 c0 test %eax,%eax ffffffff810e29df: 75 f2 jne ffffffff810e29d3 <native_queued_spin_lock_slowpath+0x13> ffffffff810e29e1: 5d pop %rbp ffffffff810e29e2: c3 retq ffffffff810e29e3: f3 90 pause ffffffff810e29e5: eb ec jmp ffffffff810e29d3 <native_queued_spin_lock_slowpath+0x13> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799497 Title: 4.15 kernel hard lockup about once a week To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799497/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
