[Xen-users] XenLinux and hypervisor compatibility (XEN_COMPAT_xxx)

[Luca Lesinigo <luca@xxxxxxxxxxxxx>]

I took the latest Linux kernel tarball from xen.org and wondering  
about HV compatibility:
- if I choose to enable compatibility with an older hypervisor (atm,  
3.0.2, 3.0.4 or 3.1.0)  will I loose any functionality/performance/ 
whatever when running that kernel on a newer one (say, 3.3.x or 3.4.x)?
- what does "no compatibility code (XEN_COMPAT_LATEST_ONLY)" actually  
mean? will this kernel run only on 3.4.1? or >=3.4.0? or 3.2.x / 3.3.x  
onwards?
it would probably be good to include the answers in the kernel config  
"help strings"....
Thank you everyone,
--
Luca Lesinigo

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