[2J[01;01H[=3h[2J[01;01H[0m[35m[40m[0m[37m[40mEFI stub: Entering in SVC mode with MMU enabled EFI stub: Booting Linux Kernel... EFI stub: Using DTB from configuration table EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path EFI stub: Exiting boot services and installing virtual address map... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 5.10.153-cip19 (KernelCI@build-j478984-arm-gcc-10-multi-v7-defconfig-wtjp6) (arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #1 SMP Wed Nov 9 10:13:57 UTC 2022 [ 0.000000] CPU: ARMv7 Processor [412fc0f1] revision 1 (ARMv7), cr=10c5387d [ 0.000000] CPU: div instructions available: patching division code [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache [ 0.000000] OF: fdt: Machine model: linux,dummy-virt [ 0.000000] random: crng init done [ 0.000000] earlycon: pl11 at MMIO 0x09000000 (options '') [ 0.000000] printk: bootconsole [pl11] enabled [ 0.000000] Memory policy: Data cache writealloc [ 0.000000] efi: EFI v2.70 by EDK II [ 0.000000] efi: SMBIOS=0x5fb78000 SMBIOS 3.0=0x5fb76000 MEMATTR=0x5e15ca90 MEMRESERVE=0x5c6eae90 [ 0.000000] cma: Reserved 64 MiB at 0x56800000 [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000040000000-0x000000005fffffff] [ 0.000000] Normal empty [ 0.000000] HighMem empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000040000000-0x000000005f9c6fff] [ 0.000000] node 0: [mem 0x000000005f9c7000-0x000000005fb88fff] [ 0.000000] node 0: [mem 0x000000005fb89000-0x000000005fffffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x000000005fffffff] [ 0.000000] On node 0 totalpages: 131072 [ 0.000000] DMA zone: 1024 pages used for memmap [ 0.000000] DMA zone: 0 pages reserved [ 0.000000] DMA zone: 131072 pages, LIFO batch:31 [ 0.000000] psci: probing for conduit method from DT. [ 0.000000] psci: PSCIv1.1 detected in firmware. [ 0.000000] psci: Using standard PSCI v0.2 function IDs [ 0.000000] psci: Trusted OS migration not required [ 0.000000] psci: SMC Calling Convention v1.0 [ 0.000000] percpu: Embedded 20 pages/cpu s49868 r8192 d23860 u81920 [ 0.000000] pcpu-alloc: s49868 r8192 d23860 u81920 alloc=20*4096 [ 0.000000] pcpu-alloc: [0] 0 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 130048 [ 0.000000] Kernel command line: console=ttyAMA0,115200 root=/dev/ram0 debug verbose console_msg_format=syslog earlycon initrd=initrd <6>[ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear) <6>[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear) <6>[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off <6>[ 0.000000] Memory: 420316K/524288K available (13312K kernel code, 2231K rwdata, 5344K rodata, 2048K init, 424K bss, 38436K reserved, 65536K cma-reserved, 0K highmem) <6>[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 <6>[ 0.000000] rcu: Hierarchical RCU implementation. <6>[ 0.000000] rcu: RCU event tracing is enabled. <6>[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=1. <6>[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. <6>[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 <6>[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 <6>[ 0.000000] GICv3: 224 SPIs implemented <6>[ 0.000000] GICv3: 0 Extended SPIs implemented <6>[ 0.000000] GICv3: Distributor has no Range Selector support <6>[ 0.000000] GICv3: 16 PPIs implemented <6>[ 0.000000] GICv3: CPU0: found redistributor 0 region 0:0x080a0000 <6>[ 0.000000] arch_timer: cp15 timer(s) running at 62.50MHz (virt). <6>[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1cd42e208c, max_idle_ns: 881590405314 ns <6>[ 0.000456] sched_clock: 56 bits at 62MHz, resolution 16ns, wraps every 4398046511096ns <6>[ 0.001652] Switching to timer-based delay loop, resolution 16ns <6>[ 0.017730] Console: colour dummy device 80x30 <6>[ 0.021142] Calibrating delay loop (skipped), value calculated using timer frequency.. 125.00 BogoMIPS (lpj=625000) <6>[ 0.022091] pid_max: default: 32768 minimum: 301 <6>[ 0.025723] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear) <6>[ 0.026294] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear) <6>[ 0.055506] CPU: Testing write buffer coherency: ok <3>[ 0.058360] CPU0: Spectre v2: firmware did not set auxiliary control register IBE bit, system vulnerable <6>[ 0.059268] CPU0: Spectre BHB: enabling loop workaround for all CPUs <3>[ 0.078191] /cpus/cpu@0 missing clock-frequency property <6>[ 0.078976] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 <6>[ 0.091511] Setting up static identity map for 0x40300000 - 0x403000ac <6>[ 0.097105] rcu: Hierarchical SRCU implementation. <6>[ 0.107731] Remapping and enabling EFI services. <6>[ 0.113271] smp: Bringing up secondary CPUs ... <6>[ 0.114016] smp: Brought up 1 node, 1 CPU <6>[ 0.114452] SMP: Total of 1 processors activated (125.00 BogoMIPS). <6>[ 0.115065] CPU: All CPU(s) started in SVC mode. <6>[ 0.137700] devtmpfs: initialized <6>[ 0.158535] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0 <6>[ 0.195711] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns <6>[ 0.198390] futex hash table entries: 256 (order: 2, 16384 bytes, linear) <6>[ 0.214255] pinctrl core: initialized pinctrl subsystem <6>[ 0.257726] SMBIOS 3.0.0 present. <6>[ 0.259146] DMI: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 <6>[ 0.274788] NET: Registered protocol family 16 <6>[ 0.318805] DMA: preallocated 256 KiB pool for atomic coherent allocations <6>[ 0.334027] thermal_sys: Registered thermal governor 'step_wise' <6>[ 0.334916] cpuidle: using governor menu <6>[ 0.336312] No ATAGs? <6>[ 0.338765] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers. <6>[ 0.339460] hw-breakpoint: maximum watchpoint size is 8 bytes. <6>[ 0.351741] Serial: AMBA PL011 UART driver <6>[ 0.479069] 9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 61, base_baud = 0) is a PL011 rev1 <6>[ 0.482658] printk: console [ttyAMA0] enabled <6>[ 0.482658] printk: console [ttyAMA0] enabled <6>[ 0.483744] printk: bootconsole [pl11] disabled <6>[ 0.483744] printk: bootconsole [pl11] disabled <6>[ 0.597761] iommu: Default domain type: Translated <6>[ 0.599909] vgaarb: loaded <5>[ 0.605447] SCSI subsystem initialized <7>[ 0.607285] libata version 3.00 loaded. <6>[ 0.610466] usbcore: registered new interface driver usbfs <6>[ 0.611308] usbcore: registered new interface driver hub <6>[ 0.611990] usbcore: registered new device driver usb <6>[ 0.617178] pps_core: LinuxPPS API ver. 1 registered <6>[ 0.617524] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <6>[ 0.618610] PTP clock support registered <6>[ 0.623053] Registered efivars operations <6>[ 0.661439] clocksource: Switched to clocksource arch_sys_counter <6>[ 2.294110] NET: Registered protocol family 2 <6>[ 2.298882] IP idents hash table entries: 8192 (order: 4, 65536 bytes, linear) <6>[ 2.309819] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear) <6>[ 2.310802] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear) <6>[ 2.311652] TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear) <6>[ 2.312446] TCP: Hash tables configured (established 4096 bind 4096) <6>[ 2.315533] UDP hash table entries: 256 (order: 1, 8192 bytes, linear) <6>[ 2.316344] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear) <6>[ 2.319276] NET: Registered protocol family 1 <6>[ 2.325832] RPC: Registered named UNIX socket transport module. <6>[ 2.326305] RPC: Registered udp transport module. <6>[ 2.326649] RPC: Registered tcp transport module. <6>[ 2.327217] RPC: Registered tcp NFSv4.1 backchannel transport module. <6>[ 2.327903] PCI: CLS 0 bytes, default 64 <6>[ 2.337701] Trying to unpack rootfs image as initramfs... <6>[ 3.521585] Freeing initrd memory: 7696K <5>[ 3.528367] Initialise system trusted keyrings <6>[ 3.531705] workingset: timestamp_bits=30 max_order=17 bucket_order=0 <6>[ 3.560002] squashfs: version 4.0 (2009/01/31) Phillip Lougher <5>[ 3.566040] NFS: Registering the id_resolver key type <5>[ 3.567281] Key type id_resolver registered <5>[ 3.567686] Key type id_legacy registered <6>[ 3.568873] nfs4filelayout_init: NFSv4 File Layout Driver Registering... <6>[ 3.569480] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering... <6>[ 3.570613] ntfs: driver 2.1.32 [Flags: R/O]. <5>[ 3.573283] Key type asymmetric registered <5>[ 3.573690] Asymmetric key parser 'x509' registered <6>[ 3.574445] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247) <6>[ 3.575157] io scheduler mq-deadline registered <6>[ 3.575608] io scheduler kyber registered <6>[ 3.626060] pl061_gpio 9030000.pl061: PL061 GPIO chip registered <6>[ 3.642541] pci-host-generic 3f000000.pcie: host bridge /pcie@10000000 ranges: <6>[ 3.644817] pci-host-generic 3f000000.pcie: IO 0x003eff0000..0x003effffff -> 0x0000000000 <6>[ 3.646307] pci-host-generic 3f000000.pcie: MEM 0x0010000000..0x003efeffff -> 0x0010000000 <6>[ 3.647272] pci-host-generic 3f000000.pcie: MEM 0x8000000000..0xffffffffff -> 0x8000000000 <6>[ 3.655712] pci-host-generic 3f000000.pcie: ECAM at [mem 0x3f000000-0x3fffffff] for [bus 00-0f] <6>[ 3.658448] pci-host-generic 3f000000.pcie: PCI host bridge to bus 0000:00 <6>[ 3.659303] pci_bus 0000:00: root bus resource [bus 00-0f] <6>[ 3.659940] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] <6>[ 3.660346] pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff] <6>[ 3.663252] pci 0000:00:00.0: [1b36:0008] type 00 class 0x060000 <6>[ 3.669611] pci 0000:00:01.0: [1af4:1000] type 00 class 0x020000 <6>[ 3.670681] pci 0000:00:01.0: reg 0x10: [io 0x0040-0x005f] <6>[ 3.671486] pci 0000:00:01.0: reg 0x20: [mem 0x10044000-0x10047fff 64bit pref] <6>[ 3.672044] pci 0000:00:01.0: reg 0x30: [mem 0xfffc0000-0xffffffff pref] <6>[ 3.673255] pci 0000:00:02.0: [1af4:1001] type 00 class 0x010000 <6>[ 3.673713] pci 0000:00:02.0: reg 0x10: [io 0x0000-0x003f] <6>[ 3.674146] pci 0000:00:02.0: reg 0x20: [mem 0x10040000-0x10043fff 64bit pref] <6>[ 3.678285] PCI: bus0: Fast back to back transfers disabled <6>[ 3.681112] pci 0000:00:01.0: BAR 6: assigned [mem 0x10000000-0x1003ffff pref] <6>[ 3.681949] pci 0000:00:01.0: BAR 4: assigned [mem 0x10040000-0x10043fff 64bit pref] <6>[ 3.682773] pci 0000:00:02.0: BAR 4: assigned [mem 0x10044000-0x10047fff 64bit pref] <6>[ 3.683358] pci 0000:00:02.0: BAR 0: assigned [io 0x1000-0x103f] <6>[ 3.683828] pci 0000:00:01.0: BAR 0: assigned [io 0x1040-0x105f] <6>[ 3.737374] virtio-pci 0000:00:01.0: enabling device (0100 -> 0103) <6>[ 3.742658] virtio-pci 0000:00:02.0: enabling device (0100 -> 0103) <6>[ 3.948013] Serial: 8250/16550 driver, 5 ports, IRQ sharing enabled <6>[ 3.962557] SuperH (H)SCI(F) driver initialized <6>[ 3.966129] msm_serial: driver initialized <6>[ 3.967384] STMicroelectronics ASC driver initialized <6>[ 3.971587] STM32 USART driver initialized <6>[ 4.052045] brd: module loaded <6>[ 4.091189] loop: module loaded <5>[ 4.103066] virtio_blk virtio1: [vda] 1048576 512-byte logical blocks (537 MB/512 MiB) <6>[ 4.103826] vda: detected capacity change from 0 to 536870912 <5>[ 4.147882] physmap-flash 0.flash: physmap platform flash device: [mem 0x00000000-0x03ffffff] <6>[ 4.151002] 0.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000 <6>[ 4.152447] Intel/Sharp Extended Query Table at 0x0031 <6>[ 4.154060] Using buffer write method <7>[ 4.155041] erase region 0: offset=0x0,size=0x40000,blocks=256 <5>[ 4.160066] physmap-flash 0.flash: physmap platform flash device: [mem 0x04000000-0x07ffffff] <6>[ 4.161448] 0.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000 <6>[ 4.162078] Intel/Sharp Extended Query Table at 0x0031 <6>[ 4.163207] Using buffer write method <7>[ 4.163512] erase region 0: offset=0x0,size=0x40000,blocks=256 <5>[ 4.163987] Concatenating MTD devices: <5>[ 4.164299] (0): \"0.flash\" <5>[ 4.164516] (1): \"0.flash\" <5>[ 4.164734] into device \"0.flash\" <6>[ 4.420360] CAN device driver interface <6>[ 4.423540] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded <6>[ 4.427329] e1000e: Intel(R) PRO/1000 Network Driver <6>[ 4.427714] e1000e: Copyright(c) 1999 - 2015 Intel Corporation. <6>[ 4.428402] igb: Intel(R) Gigabit Ethernet Network Driver <6>[ 4.428775] igb: Copyright (c) 2007-2014 Intel Corporation. <6>[ 4.441998] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver <6>[ 4.442723] usbcore: registered new interface driver pegasus <6>[ 4.443290] usbcore: registered new interface driver asix <6>[ 4.443784] usbcore: registered new interface driver ax88179_178a <6>[ 4.444316] usbcore: registered new interface driver cdc_ether <6>[ 4.444870] usbcore: registered new interface driver smsc75xx <6>[ 4.445424] usbcore: registered new interface driver smsc95xx <6>[ 4.445938] usbcore: registered new interface driver net1080 <6>[ 4.446460] usbcore: registered new interface driver cdc_subset <6>[ 4.447395] usbcore: registered new interface driver zaurus <6>[ 4.448062] usbcore: registered new interface driver cdc_ncm <6>[ 4.456123] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver <6>[ 4.456621] ehci-pci: EHCI PCI platform driver <6>[ 4.457713] ehci-platform: EHCI generic platform driver <6>[ 4.458840] ehci-orion: EHCI orion driver <6>[ 4.459634] SPEAr-ehci: EHCI SPEAr driver <6>[ 4.460365] ehci-st: EHCI STMicroelectronics driver <6>[ 4.461127] ehci-exynos: EHCI Exynos driver <6>[ 4.461865] ehci-atmel: EHCI Atmel driver <6>[ 4.462603] tegra-ehci: Tegra EHCI driver <6>[ 4.463426] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver <6>[ 4.463987] ohci-pci: OHCI PCI platform driver <6>[ 4.464728] ohci-platform: OHCI generic platform driver <6>[ 4.465635] SPEAr-ohci: OHCI SPEAr driver <6>[ 4.466362] ohci-st: OHCI STMicroelectronics driver <6>[ 4.467537] ohci-atmel: OHCI Atmel driver <6>[ 4.470821] usbcore: registered new interface driver usb-storage <6>[ 4.488310] i2c /dev entries driver <6>[ 4.529391] sdhci: Secure Digital Host Controller Interface driver <6>[ 4.529811] sdhci: Copyright(c) Pierre Ossman <6>[ 4.535461] Synopsys Designware Multimedia Card Interface Driver <6>[ 4.540202] sdhci-pltfm: SDHCI platform and OF driver helper <6>[ 4.551862] ledtrig-cpu: registered to indicate activity on CPUs <6>[ 4.562972] pstore: Registered efi as persistent store backend <6>[ 4.565941] usbcore: registered new interface driver usbhid <6>[ 4.566350] usbhid: USB HID core driver <6>[ 4.583007] NET: Registered protocol family 10 <6>[ 4.597327] Segment Routing with IPv6 <6>[ 4.598489] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver <6>[ 4.604260] NET: Registered protocol family 17 <6>[ 4.604850] can: controller area network core <6>[ 4.605923] NET: Registered protocol family 29 <6>[ 4.606307] can: raw protocol <6>[ 4.607076] can: broadcast manager protocol <6>[ 4.607671] can: netlink gateway - max_hops=1 <5>[ 4.610207] Key type dns_resolver registered <6>[ 4.611097] ThumbEE CPU extension supported. <5>[ 4.611543] Registering SWP/SWPB emulation handler <5>[ 4.613989] Loading compiled-in X.509 certificates <6>[ 4.629072] pstore: Using crash dump compression: deflate <6>[ 4.649273] input: gpio-keys as /devices/platform/gpio-keys/input/input0 <6>[ 4.663191] uart-pl011 9000000.pl011: no DMA platform data <6>[ 4.939945] Freeing unused kernel memory: 2048K <6>[ 4.963481] Run /init as init process <7>[ 4.963772] with arguments: <7>[ 4.964019] /init <7>[ 4.964209] verbose <7>[ 4.964419] with environment: <7>[ 4.964680] HOME=/ <7>[ 4.964881] TERM=linux Starting syslogd: OK Starting klogd: OK Running sysctl: OK Populating /dev using udev: <30>[ 7.637382] udevd[75]: starting version 3.2.9 <27>[ 7.767400] udevd[75]: specified user 'tss' unknown <27>[ 7.769661] udevd[75]: specified group 'tss' unknown <30>[ 7.820600] udevd[76]: starting eudev-3.2.9 done Saving random seed: OK Starting network: OK Starting dropbear sshd: OK /bin/sh: can't access tty; job control turned off / # / # # # / # mkdir /lava-2831617 mkdir /lava-2831617 / # mount /dev/disk/by-uuid/79babb41-9d6c-490a-9b1b-a888d7d04d60 -t ext2 /lava-2831617 mount /dev/disk/by-uuid/79babb41-9d6c-490a-9b1b-a888d7d04d60 -t ext2 /lava-2 831617 <6>[ 27.020430] EXT4-fs (vda): mounting ext2 file system using the ext4 subsystem <6>[ 27.075710] EXT4-fs (vda): mounted filesystem without journal. Opts: (null) / # ls -la /lava-2831617/bin/lava-test-runner ls -la /lava-2831617/bin/lava-test-runner -rwxr-xr-x 1 root root 1039 Nov 9 2022 [1;32m/lava-2831617/bin/lava-test-runner[m / # export SHELL=/bin/sh export SHELL=/bin/sh / # . /lava-2831617/environment . /lava-2831617/environment / # /lava-2831617/bin/lava-test-runner /lava-2831617/0 /lava-2831617/bin/lava-test-runner /lava-2831617/0 + export 'TESTRUN_ID=0_dmesg' + cd /lava-2831617/0/tests/0_dmesg + cat uuid + UUID=2831617_1.1.3.1 + set +x <8>[ 28.666806] + KERNELCI_LAVA=y /bin/sh /opt/kernelci/dmesg.sh <8>[ 29.258516] <8>[ 29.674502] <8>[ 30.168616] + set +x <8>[ 30.179998] # / # #mkdir /lava-2831617 / # mkdir /lava-2831617mount /dev/disk/by-uuid/79babb41-9d6c-490a-9b1b-a888d7d04d60 -t ext2 /lava-2831617 mount /dev/disk/by-uuid/79babb41-9d6c-490a-9b1b-a888d7d04d60 -t ext2 /lava-2831617mkdir: can't create directory '/lava-2831617': File exists / # mount /dev/disk/by-uuid/79babb41-9d6c-490a-9b1b-a888ls -la /lava-2831617/bin/lava-test-runner d7d04d60 -t ext2 /lava-2 831617 mount: mounting /dev/disk/by-uuid/79babb41-9d6c-490a-9b1b-a888d7d04d60 on /lava-2831617 failed: Device or resource busy ls -la /lava-2831617/bin/lava-test-runner/ # ls -la /lava-2831617/bin/lava-test-runnerexport SHELL=/bin/sh export SHELL=/bin/sh-rwxr-xr-x 1 root root 1039 Nov 9 2022 [1;32m/lava-2831617/bin/lava-test-runner[m / # export SHELL=/bin/sh. /lava-2831617/environment / # . /lava-2831617/environment/lava-2831617/bin/lava-test-runner /lava-2831617/1 / # /lava-2831617/bin/lava-test-runner /lava-2831617/1 + export 'TESTRUN_ID=1_bootrr' + cd /lava-2831617/1/tests/1_bootrr + cat uuid + UUID=2831617_1.1.3.5 + set +x <8>[ 31.712390] + export 'PATH=/opt/bootrr/helpers:/lava-2831617/1/../bin:/sbin:/usr/sbin:/bin:/usr/bin' + cd /opt/bootrr + sh helpers/bootrr-auto /lava-2831617/1/../bin/lava-test-case <8>[ 33.225532] /lava-2831617/1/../bin/lava-test-case <8>[ 33.654177] /lava-2831617/1/../bin/lava-test-case <8>[ 33.834130] + set +x <8>[ 34.081994] / # poweroff poweroff