Hello, On Mon, Feb 07, 2011 at 08:23:23PM +0000, Michael Stevens wrote: Why it was needed for the -xen kernels or why it's no longer needed for the newer pvops kernels? Some customers using -xen kernels experienced this: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1098 The workaround worked and didn't seem to affect anyone negatively so it became our standard setting. When newer kernels incorporating generic virtual guest support ("pvops") became available, clocksource=jiffies not only wasn't necessary but produced some odd timing effects. So it must be removed. Cheers, Andy -- http://bitfolk.com/ -- No-nonsense VPS hosting