From: Stephen Boyd [mailto:sboyd@xxxxxxxxxxxxxx] > (..) Is this an SMP capable device? What devicetree blob are you using? Yes, this is an i.MX6 quad. I boot with imx6q-sabresd.dtb > (..) Well oddly I don't see any twd in the timer list > but that may be because you're not running more than one CPU? > It would be good to get the output when you run SMP if it has that support. Now that you mention it I see that mainline v3.10 boots with only one CPU. So I took next-20130625 instead, which does boot in SMP, and I captured /proc/timer_list and /proc/interrupts below. > (..) If you can get debug_ll and earlyprinkt working it would be useful > if you can apply the attached patch and give back the logs. Sure; it worked, thanks. I pasted the full boot log below. There are messages about clockevents_program_event(), it seems. Best regards, V. --- /proc/timer_list --- Timer List Version: v0.7 HRTIMER_MAX_CLOCK_BASES: 4 now at 67484354137 nsecs cpu: 0 clock 0: .base: 80fa6620 .index: 0 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <80fa68f8>, tick_sched_timer, S:01 # expires at 67490000000-67490000000 nsecs [in 5646514 to 5646514 nsecs] #1: <bf875a90>, hrtimer_wakeup, S:01 # expires at 68540821093-68545821090 nsecs [in 1056467607 to 1061467604 nsecs] #2: <bef37f28>, hrtimer_wakeup, S:01 # expires at 70726814442-70726864442 nsecs [in 3242460956 to 3242510956 nsecs] #3: <bf0dff28>, hrtimer_wakeup, S:01 # expires at 90990432538-90990482538 nsecs [in 23506079052 to 23506129052 nsecs] #4: <bed49a90>, hrtimer_wakeup, S:01 # expires at 86430225655326-86430325655326 nsecs [in 86362741301840 to 86362841301840 nsecs] clock 1: .base: 80fa6658 .index: 1 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 9030273192973 nsecs active timers: clock 2: .base: 80fa6690 .index: 2 .resolution: 1 nsecs .get_time: ktime_get_boottime .offset: 0 nsecs active timers: clock 3: .base: 80fa66c8 .index: 3 .resolution: 1 nsecs .get_time: ktime_get_clocktai .offset: 9030273192973 nsecs active timers: .expires_next : 67490000000 nsecs .hres_active : 1 .nr_events : 2441 .nr_retries : 0 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .last_tick : 67480000000 nsecs .tick_stopped : 0 .idle_jiffies : 4294944043 .idle_calls : 13840 .idle_sleeps : 1049 .idle_entrytime : 67482221744 nsecs .idle_waketime : 67474377895 nsecs .idle_exittime : 67474461274 nsecs .idle_sleeptime : 52815293619 nsecs .iowait_sleeptime: 2416282884 nsecs .last_jiffies : 4294944044 .next_jiffies : 4294944045 .idle_expires : 67510000000 nsecs jiffies: 4294944044 cpu: 1 clock 0: .base: 80fae620 .index: 0 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <80fae8f8>, tick_sched_timer, S:01 # expires at 67490000000-67490000000 nsecs [in 5646514 to 5646514 nsecs] clock 1: .base: 80fae658 .index: 1 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 9030273192973 nsecs active timers: clock 2: .base: 80fae690 .index: 2 .resolution: 1 nsecs .get_time: ktime_get_boottime .offset: 0 nsecs active timers: clock 3: .base: 80fae6c8 .index: 3 .resolution: 1 nsecs .get_time: ktime_get_clocktai .offset: 9030273192973 nsecs active timers: .expires_next : 67490000000 nsecs .hres_active : 1 .nr_events : 1297 .nr_retries : 0 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .last_tick : 67480000000 nsecs .tick_stopped : 0 .idle_jiffies : 4294944043 .idle_calls : 4804 .idle_sleeps : 956 .idle_entrytime : 67480050107 nsecs .idle_waketime : 67475562153 nsecs .idle_exittime : 67475569865 nsecs .idle_sleeptime : 63549212250 nsecs .iowait_sleeptime: 152457798 nsecs .last_jiffies : 4294944044 .next_jiffies : 4294944045 .idle_expires : 92808680164 nsecs jiffies: 4294944044 cpu: 2 clock 0: .base: 80fb6620 .index: 0 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <80fb68f8>, tick_sched_timer, S:01 # expires at 67640000000-67640000000 nsecs [in 155646514 to 155646514 nsecs] clock 1: .base: 80fb6658 .index: 1 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 9030273192973 nsecs active timers: clock 2: .base: 80fb6690 .index: 2 .resolution: 1 nsecs .get_time: ktime_get_boottime .offset: 0 nsecs active timers: clock 3: .base: 80fb66c8 .index: 3 .resolution: 1 nsecs .get_time: ktime_get_clocktai .offset: 9030273192973 nsecs active timers: .expires_next : 67640000000 nsecs .hres_active : 1 .nr_events : 1350 .nr_retries : 0 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .last_tick : 67450000000 nsecs .tick_stopped : 1 .idle_jiffies : 4294944040 .idle_calls : 2712 .idle_sleeps : 446 .idle_entrytime : 67440072774 nsecs .idle_waketime : 67440003456 nsecs .idle_exittime : 67440042425 nsecs .idle_sleeptime : 64448445338 nsecs .iowait_sleeptime: 201545335 nsecs .last_jiffies : 4294944040 .next_jiffies : 4294944060 .idle_expires : 67640000000 nsecs jiffies: 4294944044 cpu: 3 clock 0: .base: 80fbe620 .index: 0 .resolution: 1 nsecs .get_time: ktime_get .offset: 0 nsecs active timers: #0: <80fbe8f8>, tick_sched_timer, S:01 # expires at 67870000000-67870000000 nsecs [in 385646514 to 385646514 nsecs] clock 1: .base: 80fbe658 .index: 1 .resolution: 1 nsecs .get_time: ktime_get_real .offset: 9030273192973 nsecs active timers: clock 2: .base: 80fbe690 .index: 2 .resolution: 1 nsecs .get_time: ktime_get_boottime .offset: 0 nsecs active timers: clock 3: .base: 80fbe6c8 .index: 3 .resolution: 1 nsecs .get_time: ktime_get_clocktai .offset: 9030273192973 nsecs active timers: .expires_next : 67870000000 nsecs .hres_active : 1 .nr_events : 928 .nr_retries : 0 .nr_hangs : 0 .max_hang_time : 0 nsecs .nohz_mode : 2 .last_tick : 66880000000 nsecs .tick_stopped : 1 .idle_jiffies : 4294943983 .idle_calls : 2050 .idle_sleeps : 176 .idle_entrytime : 66870068456 nsecs .idle_waketime : 66870003047 nsecs .idle_exittime : 66870041956 nsecs .idle_sleeptime : 64340076917 nsecs .iowait_sleeptime: 67903365 nsecs .last_jiffies : 4294943983 .next_jiffies : 4294944083 .idle_expires : 67870000000 nsecs jiffies: 4294944044 Tick Device: mode: 1 Broadcast device Clock Event Device: mxc_timer1 max_delta_ns: 65075261923 min_delta_ns: 3863 mult: 141733921 shift: 31 mode: 1 next_event: 9223372036854775807 nsecs set_next_event: v2_set_next_event set_mode: mxc_set_mode event_handler: tick_handle_oneshot_broadcast retries: 0 tick_broadcast_mask: 00000000 tick_broadcast_oneshot_mask: 00000000 Tick Device: mode: 1 Per CPU device: 0 Clock Event Device: local_timer max_delta_ns: 10845877002 min_delta_ns: 1000 mult: 850403525 shift: 31 mode: 3 next_event: 67490000000 nsecs set_next_event: twd_set_next_event set_mode: twd_set_mode event_handler: hrtimer_interrupt retries: 0 Tick Device: mode: 1 Per CPU device: 1 Clock Event Device: local_timer max_delta_ns: 10845877002 min_delta_ns: 1000 mult: 850403525 shift: 31 mode: 3 next_event: 67490000000 nsecs set_next_event: twd_set_next_event set_mode: twd_set_mode event_handler: hrtimer_interrupt retries: 0 Tick Device: mode: 1 Per CPU device: 2 Clock Event Device: local_timer max_delta_ns: 10845877002 min_delta_ns: 1000 mult: 850403525 shift: 31 mode: 3 next_event: 67840000000 nsecs set_next_event: twd_set_next_event set_mode: twd_set_mode event_handler: hrtimer_interrupt retries: 0 Tick Device: mode: 1 Per CPU device: 3 Clock Event Device: local_timer max_delta_ns: 10845877002 min_delta_ns: 1000 mult: 850403525 shift: 31 mode: 3 next_event: 67870000000 nsecs set_next_event: twd_set_next_event set_mode: twd_set_mode event_handler: hrtimer_interrupt retries: 0 --- /proc/interrupts --- CPU0 CPU1 CPU2 CPU3 29: 2667 1326 1719 1004 GIC 29 twd 34: 0 0 0 0 GIC 34 sdma 51: 0 0 0 0 GIC 51 rtc alarm 55: 0 0 0 0 GIC 55 mmc0 56: 769 0 0 0 GIC 56 mmc1 58: 647 0 0 0 GIC 58 IMX-uart 63: 2 0 0 0 GIC 63 spi_imx 68: 0 0 0 0 GIC 68 21a0000.i2c 72: 0 0 0 0 GIC 72 ci_hdrc_imx 75: 0 0 0 0 GIC 75 ci_hdrc_imx 87: 9 0 0 0 GIC 87 i.MX Timer Tick 150: 33007 0 0 0 GIC 150 2188000.ethernet 151: 0 0 0 0 GIC 151 2188000.ethernet 164: 0 0 0 0 gpio-mxc 4 Volume Up 165: 0 0 0 0 gpio-mxc 5 Volume Down 192: 0 0 0 0 gpio-mxc 0 2198000.usdhc cd 194: 0 0 0 0 gpio-mxc 2 2194000.usdhc cd 384: 0 0 0 0 IPU 23 imx_drm 385: 0 0 0 0 IPU 28 imx_drm 386: 0 0 0 0 IPU 23 imx_drm 387: 0 0 0 0 IPU 28 imx_drm IPI0: 0 0 0 0 CPU wakeup interrupts IPI1: 0 0 0 0 Timer broadcast interrupts IPI2: 1566 4556 2282 1940 Rescheduling interrupts IPI3: 3 5 2 5 Function call interrupts IPI4: 0 0 0 0 Single function call interrupts IPI5: 0 0 0 0 CPU stop interrupts Err: 0 --- Boot log with debug_ll, earlyprintk and patch 2 --- U-Boot 2013.07-rc1-00209-g35186c8 (Jun 28 2013 - 18:22:00) CPU: Freescale i.MX6Q rev1.2 at 792 MHz Reset cause: POR Board: MX6Q-SabreSD DRAM: 1 GiB MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2 In: serial Out: serial Err: serial Net: FEC [PRIME] Hit any key to stop autoboot: 0 Booting from net ... FEC Waiting for PHY auto negotiation to complete.... done BOOTP broadcast 1 DHCP client bound to address 192.168.111.121 Using FEC device TFTP from server 192.168.111.1; our IP address is 192.168.111.121 Filename 'uImage'. Load address: 0x12000000 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ##################################### 4.2 MiB/s done Bytes transferred = 4359040 (428380 hex) BOOTP broadcast 1 DHCP client bound to address 192.168.111.121 Using FEC device TFTP from server 192.168.111.1; our IP address is 192.168.111.121 Filename 'imx6q-sabresd.dtb'. Load address: 0x11000000 Loading: ## 2.8 MiB/s done Bytes transferred = 26879 (68ff hex) ## Booting kernel from Legacy Image at 12000000 ... Image Name: Linux-3.10.0-next-20130701+ Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 4358976 Bytes = 4.2 MiB Load Address: 10008000 Entry Point: 10008000 Verifying Checksum ... OK ## Flattened Device Tree blob at 11000000 Booting using the fdt blob at 0x11000000 Loading Kernel Image ... OK OK Using Device Tree in place at 11000000, end 110098fe Starting kernel ... Uncompressing Linux... done, booting the kernel. Booting Linux on physical CPU 0x0 Linux version 3.10.0-next-20130701+ (vstehle@debian) (gcc version 4.7.2 (Debian 4.7.2-5) ) #1 SMP Mon Jul 1 11:52:44 CEST 2013 CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache Machine: Freescale i.MX6 Quad/DualLite (Device Tree), model: Freescale i.MX6 Quad SABRE Smart Device Board bootconsole [earlycon0] enabled Memory policy: ECC disabled, Data cache writealloc On node 0 totalpages: 262144 free_area_init_node: node 0, pgdat 8078bd00, node_mem_map 807ea000 Normal zone: 2048 pages used for memmap Normal zone: 0 pages reserved Normal zone: 262144 pages, LIFO batch:31 PERCPU: Embedded 7 pages/cpu @81007000 s7680 r8192 d12800 u32768 pcpu-alloc: s7680 r8192 d12800 u32768 alloc=8*4096 pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 260096 Kernel command line: console=ttymxc0,115200 root=/dev/nfs ip=dhcp nfsroot=192.168.111.1:/tftpboot/debian,v3,tcp rw earlyprintk debug PID hash table entries: 4096 (order: 2, 16384 bytes) Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) Memory: 1031272K/1048576K available (5380K kernel code, 273K rwdata, 1736K rodata, 303K init, 373K bss, 17304K reserved) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) vmalloc : 0xc0800000 - 0xff000000 (1000 MB) lowmem : 0x80000000 - 0xc0000000 (1024 MB) modules : 0x7f000000 - 0x80000000 ( 16 MB) .text : 0x80008000 - 0x806fb4e4 (7118 kB) .init : 0x806fc000 - 0x80747e00 ( 304 kB) .data : 0x80748000 - 0x8078c540 ( 274 kB) .bss : 0x8078c540 - 0x807e9bb4 ( 374 kB) SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 Hierarchical RCU implementation. NR_IRQS:16 nr_irqs:16 16 sched_clock: 32 bits at 66MHz, resolution 15ns, wraps every 65075ms Checking mxc_timer1 0: mxc_timer1 is per-cpu 0: mxc_timer1 is preferred CPU identified as i.MX6Q, silicon rev 1.2 Console: colour dummy device 80x30 Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 512 CPU: Testing write buffer coherency: ok CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 Checking local_timer 0: local_timer is per-cpu 0: local_timer is preferred Checking mxc_timer1 0: mxc_timer1 is per-cpu 0: mxc_timer1 is trying broadcast mxc_timer1 is now the broadcast Setting up static identity map for 0x8051be70 - 0x8051bee0 Checking dummy_timer 0: dummy_timer is per-cpu 0: dummy_timer is trying broadcast CPU1: Booted secondary processor Checking dummy_timer 1: dummy_timer is per-cpu 1: dummy_timer is preferred CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 Checking local_timer CPU2: Booted secondary processor 1: local_timer is per-cpu 1: local_timer is preferred Checking dummy_timer 1: dummy_timer is per-cpu 1: dummy_timer is trying broadcast Checking dummy_timer 2: dummy_timer is per-cpu 2: dummy_timer is preferred CPU2: thread -1, cpu 2, socket 0, mpidr 80000002 Checking local_timer CPU3: Booted secondary processor 2: local_timer is per-cpu 2: local_timer is preferred Checking dummy_timer 2: dummy_timer is per-cpu 2: dummy_timer is trying broadcast Checking dummy_timer 3: dummy_timer is per-cpu 3: dummy_timer is preferred CPU3: thread -1, cpu 3, socket 0, mpidr 80000003 Checking local_timer Brought up 4 CPUs SMP: Total of 4 processors activated (6324.22 BogoMIPS). CPU: All CPU(s) started in SVC mode. devtmpfs: initialized pinctrl core: initialized pinctrl subsystem regulator-dummy: no parameters NET: Registered protocol family 16 DMA: preallocated 256 KiB pool for atomic coherent allocations syscon 20c8000.anatop: regmap [mem 0x020c8000-0x020c8fff] registered vdd1p1: 800 <--> 1375 mV at 1100 mV vdd3p0: 2800 <--> 3150 mV at 3000 mV vdd2p5: 2000 <--> 2750 mV at 2400 mV cpu: 725 <--> 1450 mV at 1150 mV vddpu: 725 <--> 1450 mV at 1150 mV vddsoc: 725 <--> 1450 mV at 1200 mV syscon 20e0000.iomuxc-gpr: regmap [mem 0x020e0000-0x020e0037] registered 3: local_timer is per-cpu 3: local_timer is preferred Checking dummy_timer 3: dummy_timer is per-cpu 3: dummy_timer is trying broadcast hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers. hw-breakpoint: maximum watchpoint size is 4 bytes. imx6q-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver bio: create slab <bio-0> at 0 mxs-dma 110000.dma-apbh: initialized usb_otg_vbus: 5000 mV wm8962-supply: no parameters SCSI subsystem initialized libata version 3.00 loaded. usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb i2c i2c-0: IMX I2C adapter registered Linux video capture interface: v2.00 pps_core: LinuxPPS API ver. 1 registered pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@xxxxxxxx> PTP clock support registered Advanced Linux Sound Architecture Driver Initialized. Switched to clocksource mxc_timer1 ------------[ cut here ]------------ ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at kernel/time/clockevents.c:212 clockevents_program_event+0x134/0x148() Modules linked in: CPU: 2 PID: 0 Comm: swapper/2 Not tainted 3.10.0-next-20130701+ #1 [<800147d4>] (unwind_backtrace+0x0/0xf0) from [<80011538>] (show_stack+0x10/0x14) [<80011538>] (show_stack+0x10/0x14) from [<805176a0>] (dump_stack+0x78/0x94) [<805176a0>] (dump_stack+0x78/0x94) from [<8002407c>] (warn_slowpath_common+0x64/0x88) [<8002407c>] (warn_slowpath_common+0x64/0x88) from [<800240bc>] (warn_slowpath_null+0x1c/0x24) [<800240bc>] (warn_slowpath_null+0x1c/0x24) from [<800613f4>] (clockevents_program_event+0x134/0x148) [<800613f4>] (clockevents_program_event+0x134/0x148) from [<80061900>] (tick_handle_periodic+0x64/0x88) [<80061900>] (tick_handle_periodic+0x64/0x88) from [<80013f48>] (twd_handler+0x2c/0x40) [<80013f48>] (twd_handler+0x2c/0x40) from [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) from [<80073d40>] (generic_handle_irq+0x20/0x30) [<80073d40>] (generic_handle_irq+0x20/0x30) from [<8000edb8>] (handle_IRQ+0x4c/0xb0) [<8000edb8>] (handle_IRQ+0x4c/0xb0) from [<800086d4>] (gic_handle_irq+0x28/0x5c) [<800086d4>] (gic_handle_irq+0x28/0x5c) from [<80012080>] (__irq_svc+0x40/0x54) Exception stack(0xbf899f98 to 0xbf899fe0) 9f80: 00000000 00003ecc 9fa0: 00000000 8001cf60 bf898000 8078c428 00000001 8078c428 807508e8 80750894 9fc0: 8051e3ac 00000000 80750894 bf899fe0 8000f0cc 8000f0d0 60000113 ffffffff [<80012080>] (__irq_svc+0x40/0x54) from [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) from [<80059f74>] (cpu_startup_entry+0x64/0x138) [<80059f74>] (cpu_startup_entry+0x64/0x138) from [<100081ec>] (0x100081ec) ---[ end trace f6330182bcabb113 ]--- NET: Registered protocol family 2 TCP established hash table entries: 8192 (order: 4, 65536 bytes) TCP bind hash table entries: 8192 (order: 4, 65536 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP: reno registered UDP hash table entries: 512 (order: 2, 16384 bytes) UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. WARNING: CPU: 3 PID: 0 at kernel/time/clockevents.c:212 clockevents_program_event+0x134/0x148() Modules linked in: CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W 3.10.0-next-20130701+ #1 [<800147d4>] (unwind_backtrace+0x0/0xf0) from [<80011538>] (show_stack+0x10/0x14) [<80011538>] (show_stack+0x10/0x14) from [<805176a0>] (dump_stack+0x78/0x94) [<805176a0>] (dump_stack+0x78/0x94) from [<8002407c>] (warn_slowpath_common+0x64/0x88) [<8002407c>] (warn_slowpath_common+0x64/0x88) from [<800240bc>] (warn_slowpath_null+0x1c/0x24) [<800240bc>] (warn_slowpath_null+0x1c/0x24) from [<800613f4>] (clockevents_program_event+0x134/0x148) [<800613f4>] (clockevents_program_event+0x134/0x148) from [<80061900>] (tick_handle_periodic+0x64/0x88) [<80061900>] (tick_handle_periodic+0x64/0x88) from [<80013f48>] (twd_handler+0x2c/0x40) [<80013f48>] (twd_handler+0x2c/0x40) from [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) from [<80073d40>] (generic_handle_irq+0x20/0x30) [<80073d40>] (generic_handle_irq+0x20/0x30) from [<8000edb8>] (handle_IRQ+0x4c/0xb0) [<8000edb8>] (handle_IRQ+0x4c/0xb0) from [<800086d4>] (gic_handle_irq+0x28/0x5c) [<800086d4>] (gic_handle_irq+0x28/0x5c) from [<80012080>] (__irq_svc+0x40/0x54) Exception stack(0xbf89bf98 to 0xbf89bfe0) bf80: 00000000 00000052 bfa0: 00000000 8001cf60 bf89a000 8078c428 00000001 8078c428 807508e8 80750894 bfc0: 8051e3ac 00000000 80750894 bf89bfe0 8000f0cc 8000f0d0 60000113 ffffffff [<80012080>] (__irq_svc+0x40/0x54) from [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) from [<80059f74>] (cpu_startup_entry+0x64/0x138) [<80059f74>] (cpu_startup_entry+0x64/0x138) from [<100081ec>] (0x100081ec) ---[ end trace f6330182bcabb114 ]--- INFO: rcu_sched self-detected stall on CPU INFO: rcu_sched self-detected stall on CPU { 2} (t=2100 jiffies g=4294966998 c=4294966997 q=8) CPU: 2 PID: 0 Comm: swapper/2 Tainted: G W 3.10.0-next-20130701+ #1 [<800147d4>] (unwind_backtrace+0x0/0xf0) from [<80011538>] (show_stack+0x10/0x14) [<80011538>] (show_stack+0x10/0x14) from [<805176a0>] (dump_stack+0x78/0x94) [<805176a0>] (dump_stack+0x78/0x94) from [<8007ccf8>] (rcu_check_callbacks+0x2a8/0x700) [<8007ccf8>] (rcu_check_callbacks+0x2a8/0x700) from [<80031ac4>] (update_process_times+0x38/0x64) [<80031ac4>] (update_process_times+0x38/0x64) from [<8006191c>] (tick_handle_periodic+0x80/0x88) [<8006191c>] (tick_handle_periodic+0x80/0x88) from [<80013f48>] (twd_handler+0x2c/0x40) [<80013f48>] (twd_handler+0x2c/0x40) from [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) from [<80073d40>] (generic_handle_irq+0x20/0x30) [<80073d40>] (generic_handle_irq+0x20/0x30) from [<8000edb8>] (handle_IRQ+0x4c/0xb0) [<8000edb8>] (handle_IRQ+0x4c/0xb0) from [<800086d4>] (gic_handle_irq+0x28/0x5c) [<800086d4>] (gic_handle_irq+0x28/0x5c) from [<80012080>] (__irq_svc+0x40/0x54) Exception stack(0xbf899f98 to 0xbf899fe0) 9f80: 00000000 00003ecc 9fa0: 00000000 8001cf60 bf898000 8078c428 00000001 8078c428 807508e8 80750894 9fc0: 8051e3ac 00000000 80750894 bf899fe0 8000f0cc 8000f0d0 60000113 ffffffff [<80012080>] (__irq_svc+0x40/0x54) from [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) from [<80059f74>] (cpu_startup_entry+0x64/0x138) [<80059f74>] (cpu_startup_entry+0x64/0x138) from [<100081ec>] (0x100081ec) { 3} (t=2115 jiffies g=4294966998 c=4294966997 q=8) CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W 3.10.0-next-20130701+ #1 [<800147d4>] (unwind_backtrace+0x0/0xf0) from [<80011538>] (show_stack+0x10/0x14) [<80011538>] (show_stack+0x10/0x14) from [<805176a0>] (dump_stack+0x78/0x94) [<805176a0>] (dump_stack+0x78/0x94) from [<8007ccf8>] (rcu_check_callbacks+0x2a8/0x700) [<8007ccf8>] (rcu_check_callbacks+0x2a8/0x700) from [<80031ac4>] (update_process_times+0x38/0x64) [<80031ac4>] (update_process_times+0x38/0x64) from [<8006191c>] (tick_handle_periodic+0x80/0x88) [<8006191c>] (tick_handle_periodic+0x80/0x88) from [<80013f48>] (twd_handler+0x2c/0x40) [<80013f48>] (twd_handler+0x2c/0x40) from [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) [<800774e8>] (handle_percpu_devid_irq+0x80/0xa0) from [<80073d40>] (generic_handle_irq+0x20/0x30) [<80073d40>] (generic_handle_irq+0x20/0x30) from [<8000edb8>] (handle_IRQ+0x4c/0xb0) [<8000edb8>] (handle_IRQ+0x4c/0xb0) from [<800086d4>] (gic_handle_irq+0x28/0x5c) [<800086d4>] (gic_handle_irq+0x28/0x5c) from [<80012080>] (__irq_svc+0x40/0x54) Exception stack(0xbf89bf98 to 0xbf89bfe0) bf80: 00000000 00000052 bfa0: 00000000 8001cf60 bf89a000 8078c428 00000001 8078c428 807508e8 80750894 bfc0: 8051e3ac 00000000 80750894 bf89bfe0 8000f0cc 8000f0d0 60000113 ffffffff [<80012080>] (__irq_svc+0x40/0x54) from [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) [<8000f0d0>] (arch_cpu_idle+0x30/0x3c) from [<80059f74>] (cpu_startup_entry+0x64/0x138) [<80059f74>] (cpu_startup_entry+0x64/0x138) from [<100081ec>] (0x100081ec) -- To unsubscribe from 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