On Tue, 2003-07-29 at 10:34, Mikael Pettersson wrote:
> My old 486 test box is losing time at an alarming rate
> when running 2.6.0-test kernels. It loses almost 2 minutes
> per hour, less if it sits idle. This problem does not
> occur when it's running a 2.4 kernel.
>
> There's nothing noteworthy in dmesg.
>
> This has been going on since at least the 2.5.7x kernels,
> and possible also the 2.5.6x kernels. I strongly suspect
> a bug in the time-keeping changes in late 2.5 kernels.
> The 486 has no TSC, and I don't have an NTP server to
> keep my machines' times in sync.
Hmm. Sounds like you're loosing interrupts. This can happen due to
poorly behaving drivers (disabling interrupts for too long), or odd
hardware. The change from HZ=100 to HZ=1000 probably made this more
visible on your box, so could you try setting HZ back to 100 and see if
that helps (you may still lose time, but at a much slower rate).
Also what drivers are you running with?
thanks
-john
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This archive was generated by hypermail 2b29 : Thu Jul 31 2003 - 22:00:42 EST