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skewed clock? Using 2.6.18-rc4-something ?
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Joined: 08 Mar 2003
Posts: 324
Location: Trondheim, NO

PostPosted: Fri Sep 15, 2006 4:58 pm    Post subject: skewed clock? Using 2.6.18-rc4-something ? Reply with quote

After a gazillion kernel recompiles, passing misc boot parameters in grub (noapictimer and friends) I finally found the solution to my ever racing clock!

I studied dmesg and saw this:

time.c: Using 3.579545 MHz WALL PM GTOD PIT/TSC timer.

Intuition told me this might have something to do with the problem, so I googled it up and found this thread on

Someone reported the exact same problem and after a while they(?) found out that the error is just 5 bytes of text in time.c.

Do this:

nano /usr/src/linux/kernel/time/ntp.c
CTRL+W and search for this line:
add the (s64)-part like this:
go back to /usr/src/linux
recompile kernel. Remember make clean first.

My clock is now sane again. Supposedly it's a bug only affecting kernelversions 2.6.18-rc4-mm2, mm1 is fine or something like that, i.e. bad luck on my part.

Oh happy day!

keywords: clock time too fast racing skew
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