patching CVS tree

[Hristo Grigorov <Hristo.Grigorov@xxxxxxxxxxx>]

Hello,

I want to patch the xfs CVS tree with the kernel preemptive patch. 
But, what happens on the next cvs update? Does it remove it automatically ?
And, is it in general recommended to do that or I have to clone the CVS tree
every time and do my "nasty" expreriments there ? What's your opinion on 
that ?

-- 
Regards, Hristo.