Date: Tue, 11 Feb 2014 10:26:43 -0700 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: Karl Pielorz <kpielorz_lst@tdx.co.uk> Cc: freebsd-xen@FreeBSD.org Subject: Re: FreeBSD 10.0-R as Xen 'guest' - clarification? Message-ID: <7EC86263-B19E-4829-A601-F78DEDCEF7E9@scsiguy.com> In-Reply-To: <18819F918745D984B618D518@Mail-PC.tdx.co.uk> References: <18819F918745D984B618D518@Mail-PC.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=
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