[CentOS-virt] tick_divider kernel parameter for guest vm

Fabian Arrotin fabian.arrotin at arrfab.net
Wed Jan 2 21:59:38 UTC 2008

When upstream released 5.1, everybody wanted to test a new kernel
parameter that could adjust the system clock rate at boot time to
something else than the standard 1000Hz clock rate.
A lot of testings has been done (thanks to Akemi Yagi for her great
work) and you can see the results here :

As you can read at the bottom of the comments, it seems it was a typo in
the official RH Release Notes : you'd have to read divider= and *NOT*
tick_divider=  ! (see

It seems so to work with the correct kernel parameter and so there is no
need to build a kernel-vm for CentOS 5.1 guests .. (it's still needed
for example for 4.x ..)

Keep on reading the comments on bugs.centos.org for further
informations ... I assume that upstream release notes will be corrected
to reflect the real parameter

Fabian Arrotin <fabian.arrotin at arrfab.net>
Solution ? 
echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq' | dc
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