On 12/10/2017 at 07:50:41 +0000, Patrick Brünn wrote: > I am seeing a lot of interrupts with kernel 4.14-rc4 (jessie and stretch), but they seem to be unhandled: > root@CX9020:~# uname -a > Linux CX9020 4.14.0-rc4+ #151 PREEMPT Wed Oct 11 10:40:34 CEST 2017 armv7l GNU/Linux > root@CX9020:~# hwclock -D -r > hwclock from util-linux 2.29.2 > Using the /dev interface to the clock. > Last drift adjustment done at 1490885082 seconds after 1969 > Last calibration done at 1490885082 seconds after 1969 > Hardware clock is on UTC time > Assuming hardware clock is kept in UTC time. > Waiting for clock tick... > [ 26.795437] irq 40: nobody cared (try booting with the "irqpoll" option) > [ 26.802696] handlers: > [ 26.805031] [<c06029e8>] dryice_irq > [ 26.808584] Disabling IRQ #40 > select() to /dev/rtc to wait for clock tick timed out...synchronization failed > root@CX9020:~# cat /proc/interrupts > CPU0 > 17: 4276 tzic 1 Edge mmc0 > 18: 52 tzic 2 Edge mmc1 > 22: 0 tzic 6 Edge sdma > 30: 176 tzic 14 Edge 53f80200.usb > 40: 100000 tzic 24 Edge 53fa4000.srtc > 48: 268 tzic 32 Edge 53fc0000.serial > 55: 2288 tzic 39 Edge i.MX Timer Tick > 74: 0 tzic 58 Edge 53f98000.wdog > 79: 278 tzic 63 Edge 63fc4000.i2c > 93: 0 tzic 77 Edge arm-pmu > 103: 662 tzic 87 Edge 63fec000.ethernet > 145: 0 gpio-mxc 1 Edge 50004000.esdhc cd > 148: 0 gpio-mxc 4 Edge 50008000.esdhc cd > 368: 674 IPU 23 Edge imx_drm > 369: 0 IPU 28 Edge imx_drm > Err: 0 > > I added some tracing to dryice_irq() and saw that most of the time (if not all the time) dsr == DSR_MCO /* monotonic clock overflow */ with dier vary between 0x110, 0x10 and even 0x0. > I don't know what's the right thing to do, to recover from DSR_MCO. " return IRQ_HANDLED" will stop the nobody cared message but hwclock still times out. > hwclock times out because the alarm is not working properly. Can you check whether rtctest is working? -- Alexandre Belloni, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
