Re: hwclock "hanging" for ~24 hours

[Tomasz Chmielewski <mangoo@xxxxxxxx>]

Karel Zak schrieb:
> On Fri, Aug 08, 2008 at 10:14:33PM +0200, Tomasz Chmielewski wrote:
> > open("/dev/rtc", O_RDONLY|O_LARGEFILE)  = 3
> > ioctl(3, RTC_UIE_ON, 0)                 = -1 ENOTTY (Inappropriate ioctl for device)
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > ioctl(3, RTC_RD_TIME, {tm_sec=0, tm_min=0, tm_hour=0, tm_mday=0, tm_mon=-1, tm_year=100, ...}) = 0
> > (...)
>
>  Yeah, our synchronize_to_clock_tick() :-)
>
>
>   hwclock/rtc.c, busywait_for_rtc_clock_tick():
>
>   for (i = 0;
>        (rc = do_rtc_read_ioctl(rtc_fd, &nowtime)) == 0
>         && start_time.tm_sec == nowtime.tm_sec;
>        i++)
>     if (i >= 1000000) {
>       fprintf(stderr, _("Timed out waiting for time change.\n"));
>       return 2;
>     }

What about waiting here in seconds rather than to make these loops?

i.e., wait 10 or 30 seconds, if it is more than that, bail out?


But would it solve the issue, really?

hwclock from busybox is able to show the clock (Tue Nov 30 00:00:00 1999  0.000000) and also set it; the above seems to exit only - and still, we're not able to show or set the clock?


--
Tomasz Chmielewski
http://wpkg.org

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