FreeBSD 10.0-R as Xen 'guest' - clarification?

[Justin T. Gibbs]

On Jan 29, 2014, at 8:28 AM, Karl Pielorz <kpielorz_lst at tdx.co.uk> wrote:

> 
> Hi,
> 
> With FreeBSD 10 being out now (Great!) - GENERIC appears now has everything needed for Xen to run in PVHVM for amd64.
> 
> The man page for xen (man 4 xen) states you should have:
> 
> options NO_ADAPTIVE_MUTEXES
> options NO_ADAPTIVE_RWLOCKS
> options NO_ADAPTIVE_SX

The “NO_ADAPTIVE” settings are an optimization when running in environments where different guests run on the same physical CPU.  However, many cloud providers seem to statically pin CPUs to VMs, which means the adaptive lock optimization works as expected.

—
Justin