FYI,

Ive just built 17-rc1-mm1, and noted that the new time-keeping-system
http://lwn.net/Articles/176837/

can now detect the buggy TSC on my GEODE-sc1100 cpu,
and also that its apparently fixable by adding 'idle=poll' to kernel-boot-line.

Apr 7 11:42:01 truck kernel: [ 19.160016] Kernel command line: console=ttyS0,115200n81 root=/dev/nfs nfsroot=192.168.42.1:/nfshost/truck nfsaddrs=192.168.42.100:192.168.42.1:192.168.42.1:255.255.255.0:soekris:eth0 panic=5 initrd=initrd-2.6.17-rc1-mm1-sk.img BOOT_IMAGE=vmlinuz-2.6.17-rc1-mm1-sk Apr 7 11:42:01 truck kernel: [ 24.314851] Time: tsc clocksource has been installed. Apr 7 11:42:01 truck kernel: [ 29.977802] TSC appears to be running slowly. Marking it as unstable Apr 7 11:42:01 truck kernel: [ 20.460000] Time: pit clocksource has been installed.

Apr 7 12:35:56 truck kernel: [ 21.562573] Kernel command line: console=ttyS0,115200n81 root=/dev/nfs nfsroot=192.168.42.1:/nfshost/truck nfsaddrs=192.168.42.100:192.168.42.1:192.168.42.1:255.255.255.0:soekris:eth0 panic=5 initrd=initrd-2.6.17-rc1-mm1-sk.img idle=poll BOOT_IMAGE=vmlinuz-2.6.17-rc1-mm1-sk
Apr  7 12:35:56 truck kernel: [   21.563049] using polling idle threads.
Apr 7 12:35:56 truck kernel: [ 28.393469] Time: tsc clocksource has been installed.


hope this is useful,
jimc

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