On Tue, 31 Jul 2007 17:56:09 -0400 Dave Jones wrote: > On Tue, Jul 31, 2007 at 02:39:39PM -0700, Randy Dunlap wrote: > > On Tue, 31 Jul 2007 17:20:10 -0400 Chuck Ebbert wrote: > > > > include/asm-generic/rtc.h: > > > 102 /* > > > 103 * Account for differences between how the RTC uses the > values > > > 104 * and how they are defined in a struct rtc_time; > > > 105 */ > > > 106 if (time->tm_year <= 69) > > > 107 time->tm_year += 100; > > > 108 > > > 109 time->tm_mon--; > > > > > > That's this config option (read all of it): > > > > config PM_TRACE > > bool "Suspend/resume event tracing" > > depends on PM_DEBUG && X86 && EXPERIMENTAL > > default n > > ---help--- > > This enables some cheesy code to save the last PM event point in the > > RTC across reboots, so that you can debug a machine that just hangs > > during suspend (or more commonly, during resume). > > > > To use this debugging feature you should attempt to suspend the machine, > > then reboot it, then run > > > > dmesg -s 1000000 | grep 'hash matches' > > > > CAUTION: this option will cause your machine's real-time clock to be > > set to an invalid time after a resume. > > Doesn't this only take effect if you've been poking /sys/power/pm_trace > though ?
Looks like only if /sys/power/pm_trace is enabled, yes. > Also, look at the date in the output from Chuck. It looks like only the > year is wrong. I'd have expected more than just the century byte to have been > corrupted. and month, but the code snippet that he posted accounts for that also. > That +100 heuristic seems really odd to me. Possibly it needs to be > checking if the century byte is set/unset, or it needs additional > clamping to make sure it doesn't overflow. OK, worth looking into... --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
