On both B and C revisions of Beaglebone black, our application (running under either the shipped Angstrom or Debian distros) locks up after random amounts of time. The debug port reports the following problems:
[ 752.038977] BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:1:15] [ 752.063631] BUG: scheduling while atomic: kworker/0:1/15/0x40010100 [ 754.935632] Kernel panic - not syncing: softlockup: hung tasks [ 754.946347] [<c0010443>] (unwind_backtrace+0x1/0x8a) from [<c0455ced>] (panic +0x51/0x148) [ 754.960814] [<c0455ced>] (panic+0x51/0x148) from [<c00678df>] (watchdog_timer _fn+0xc3/0xf8) [ 754.975585] [<c00678df>] (watchdog_timer_fn+0xc3/0xf8) from [<c00421f3>] (__r un_hrtimer+0xb3/0x140) [ 754.991496] [<c00421f3>] (__run_hrtimer+0xb3/0x140) from [<c004295b>] (hrtime r_interrupt+0xd7/0x1c8) [ 755.007625] [<c004295b>] (hrtimer_interrupt+0xd7/0x1c8) from [<c001c8ed>] (om ap2_gp_timer_interrupt+0x11/0x1c) [ 755.025164] [<c001c8ed>] (omap2_gp_timer_interrupt+0x11/0x1c) from [<c0067fa9 >] (handle_irq_event_percpu+0x4d/0x174) [ 755.043502] [<c0067fa9>] (handle_irq_event_percpu+0x4d/0x174) from [<c00680f9 >] (handle_irq_event+0x29/0x3c) [ 755.060694] [<c00680f9>] (handle_irq_event+0x29/0x3c) from [<c0069b17>] (hand le_level_irq+0x6f/0x84) [ 755.076699] [<c0069b17>] (handle_level_irq+0x6f/0x84) from [<c0067bff>] (gene ric_handle_irq+0x13/0x1c) [ 755.092998] [<c0067bff>] (generic_handle_irq+0x13/0x1c) from [<c000c8cb>] (ha ndle_IRQ+0x3b/0x5c) [ 755.108422] [<c000c8cb>] (handle_IRQ+0x3b/0x5c) from [<c0008551>] (omap3_intc _handle_irq+0x39/0x58) [ 755.124243] [<c0008551>] (omap3_intc_handle_irq+0x39/0x58) from [<c045b95b>] (__irq_svc+0x3b/0x5c) [ 755.139692] Exception stack(0xdf117cf8 to 0xdf117d40) [ 755.148646] 7ce0: 00000 000 c0849ac0 [ 755.162967] 7d00: 00000000 00000000 c07a2080 00000000 df116000 00000002 df117 db0 00000003 [ 755.177335] 7d20: c0812610 df116000 edb88320 df117d40 c0031241 c0030f4e 40000 133 ffffffff [ 755.191758] [<c045b95b>] (__irq_svc+0x3b/0x5c) from [<c0030f4e>] (__do_softir q+0x46/0x174) [ 755.206357] [<c0030f4e>] (__do_softirq+0x46/0x174) from [<c0031241>] (irq_exi t+0x29/0x50) [ 755.220773] [<c0031241>] (irq_exit+0x29/0x50) from [<c000c8cf>] (handle_IRQ+0 x3f/0x5c) [ 755.234735] [<c000c8cf>] (handle_IRQ+0x3f/0x5c) from [<c0008551>] (omap3_intc _handle_irq+0x39/0x58) [ 755.250549] [<c0008551>] (omap3_intc_handle_irq+0x39/0x58) from [<c045b95b>] (__irq_svc+0x3b/0x5c) [ 755.265995] Exception stack(0xdf117db0 to 0xdf117df8) [ 755.274974] 7da0: 00000002 00000000 00007 d00 00000000 [ 755.289328] 7dc0: c07c81d0 c07c81d0 c07c75dc 00007d02 0000007d 00000003 c0812 610 de5f4b40 [ 755.303615] 7de0: 00000100 df117df8 c0025b2d c0025bea 00000133 ffffffff [ 755.315416] [<c045b95b>] (__irq_svc+0x3b/0x5c) from [<c0025bea>] (omap3_nonco re_dpll_set_rate+0x1f2/0x330) [ 755.332303] [<c0025bea>] (omap3_noncore_dpll_set_rate+0x1f2/0x330) from [<c03 83273>] (clk_change_rate+0x1b/0x52) [ 755.350016] [<c0383273>] (clk_change_rate+0x1b/0x52) from [<c03832fb>] (clk_s et_rate+0x51/0x72) [ 755.365316] [<c03832fb>] (clk_set_rate+0x51/0x72) from [<c034ba29>] (cpu0_set _target+0xf9/0x198) [ 755.380787] [<c034ba29>] (cpu0_set_target+0xf9/0x198) from [<c0348c5d>] (__cp ufreq_driver_target+0x4d/0x70) [ 755.397849] [<c0348c5d>] (__cpufreq_driver_target+0x4d/0x70) from [<c034b33b> ] (dbs_check_cpu+0x123/0x134) [ 755.414765] [<c034b33b>] (dbs_check_cpu+0x123/0x134) from [<c034ad31>] (od_db s_timer+0x4d/0xb0) [ 755.430064] [<c034ad31>] (od_dbs_timer+0x4d/0xb0) from [<c003c8c5>] (process_ one_work+0x1b5/0x2c0) [ 755.445787] [<c003c8c5>] (process_one_work+0x1b5/0x2c0) from [<c003cca3>] (wo rker_thread+0x19b/0x258) [ 755.461985] [<c003cca3>] (worker_thread+0x19b/0x258) from [<c003fb8f>] (kthre ad+0x67/0x74) [ 755.476573] [<c003fb8f>] (kthread+0x67/0x74) from [<c000c0dd>] (ret_from_fork +0x11/0x34) [ 755.490617] drm_kms_helper: panic occurred, switching back to text console [ 696.382258] CAUTION: musb: Babble Interrupt Occurred [ 696.422949] CAUTION: musb: Babble Interrupt Occurred [ 696.483459] gadget: high-speed config #1: Multifunction with RNDIS [ 702.376300] musb_g_ep0_irq 710: SetupEnd came in a wrong ep0stage wait [ 775.658309] CAUTION: musb: Babble Interrupt Occurred The application performs a modest amount of IO using FTDI through a USB hub. The more USB devices we service, the faster the freeze appears, though it can happen soon after the code runs, or as much as 16 hours later. This very much appears to be a kernel or driver issue. Can it be diagnosed, and is there a way of fixing it? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
