[ntp:questions] Re: do_clock_gettime resulting in Linux crash?
hmurray at suespammers.org
Mon Jan 19 02:43:33 UTC 2004
>I don't know if this is a bug, or if it is, where it lives, but my
>ntp-4.2.0/Linux-2.4.21/PPSkit-2.1.2 machine is crashing after three or four
>hours of operation in PPS mode.
>I'm using an HP Z3801A clock with the hpgps driver modified only to handle
>the different serial port params (19200, O71). The system starts normally
>and ntp brings up the GPS and PPS interfaces with kernel discipline
>apparently working just fine. Then the machine hangs, with a screenfull
>(or more) of:
>do_clock_gettime: negative time warp on CPU#0: -467348901ns (0,9787444) #
>the numbers vary
I'm running a Z3801A on a 2.4.16 kernel. I have seen the negative time
warm messages, but haven't tried to track them down. On my system,
it prints: (won't complain any more), and they stop. That's
after a 100 or so of them.
I'm using the Atom/PPS driver rather than the direct-kernel mode.
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