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Subject: Re: FreeBSD 10.0-R as Xen 'guest' - clarification?
From: "Justin T. Gibbs" <gibbs@scsiguy.com>
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Date: Tue, 11 Feb 2014 10:26:43 -0700
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To: Karl Pielorz <kpielorz_lst@tdx.co.uk>
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On Jan 29, 2014, at 8:28 AM, Karl Pielorz <kpielorz_lst@tdx.co.uk> =
wrote:

>=20
> Hi,
>=20
> With FreeBSD 10 being out now (Great!) - GENERIC appears now has =
everything needed for Xen to run in PVHVM for amd64.
>=20
> The man page for xen (man 4 xen) states you should have:
>=20
> options NO_ADAPTIVE_MUTEXES
> options NO_ADAPTIVE_RWLOCKS
> options NO_ADAPTIVE_SX

The =93NO_ADAPTIVE=94 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.

=97
Justin=