FYI, we noticed the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel
commit 7411df6b66594f6eaeac23fe0174aad4aa71d6f9 ("TTY: serial_core, add
->install")
on test machine: vm-vp-quantal-x86_64: 2 threads qemu-system-x86_64 -enable-kvm with 360M
memory
caused below changes:
+----------------+------------+------------+
| | 16b6770edb | 7411df6b66 |
+----------------+------------+------------+
| boot_successes | 0 | 0 |
+----------------+------------+------------+
WARNING: 'debug_locks &&
!lock_is_held(&(&state->port.mutex)->dep_map)' is true!
------------[ cut here ]------------
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/tty/serial/serial_core.c:98 uart_install+0xd4/0xe0
WARNING: CPU: 0 PID: 1 at drivers/tty/serial/serial_core.c:98 uart_install+0xd4/0xe0
CPU: 0 PID: 1 Comm: swapper Not tainted 4.7.0-rc2-next-20160609-00023-g7411df6 #1
CPU: 0 PID: 1 Comm: swapper Not tainted 4.7.0-rc2-next-20160609-00023-g7411df6 #1
power_supply test_battery: uevent
FYI, raw QEMU command line is:
qemu-system-x86_64 -enable-kvm -kernel
/pkg/linux/x86_64-randconfig-s1-06091829/gcc-6/7411df6b66594f6eaeac23fe0174aad4aa71d6f9/vmlinuz-4.7.0-rc2-next-20160609-00023-g7411df6
-append 'root=/dev/ram0 user=lkp
job=/lkp/scheduled/vm-vp-quantal-x86_64-49/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-randconfig-s1-06091829-7411df6b66594f6eaeac23fe0174aad4aa71d6f9-20160610-12341-j3nm4r-0.yaml~
ARCH=x86_64 kconfig=x86_64-randconfig-s1-06091829
branch=linux-devel/devel-catchup-201606092006
commit=7411df6b66594f6eaeac23fe0174aad4aa71d6f9
BOOT_IMAGE=/pkg/linux/x86_64-randconfig-s1-06091829/gcc-6/7411df6b66594f6eaeac23fe0174aad4aa71d6f9/vmlinuz-4.7.0-rc2-next-20160609-00023-g7411df6
max_uptime=600
RESULT_ROOT=/result/boot/1/vm-vp-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-randconfig-s1-06091829/gcc-6/7411df6b66594f6eaeac23fe0174aad4aa71d6f9/0
LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug
sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1
nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200
console=tty0 vga=normal rw ip=::::vm-vp-quantal-x86_64-49::dhcp drbd.minor_count=8'
-initrd /fs/sdf1/initrd-vm-vp-quantal-x86_64-49 -m 360 -smp 2 -device e1000,netdev=net0
-netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime
-pidfile /dev/shm/kboot/pid-vm-vp-quantal-x86_64-49 -serial
file:/dev/shm/kboot/serial-vm-vp-quantal-x86_64-49 -daemonize -display none -monitor null
Thanks,
Kernel Test Robot