Date: Tue, 22 Sep 2009 17:14:40 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Larry Baird <lab@gta.com> Cc: freebsd-xen@freebsd.org Subject: Re: XEN 5.5.0 and clflush Message-ID: <20090922141440.GX47688@deviant.kiev.zoral.com.ua> In-Reply-To: <20090922135914.GA44294@gta.com> References: <20090922123401.GB29391@gta.com> <20090922131034.GV47688@deviant.kiev.zoral.com.ua> <20090922135914.GA44294@gta.com>
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--BgdT6MQD5banEouU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 22, 2009 at 09:59:14AM -0400, Larry Baird wrote: > Kostik, >=20 > > I am sorry for delay in answering, you may use this temporal patch until > > the issue is resolved somehow. > >=20 > > I think I will have to disable CLFLUSH support for intel CPUs when self= -snoop > > is not reported. > Thanks for the feedback? Have you heard about this being a problem on > platforms other than XEN? No, and AMD should have CPUs without self-snoop, but supporting CLFLUSH. This is the main reason for this optimization came in, and no single compla= in from this problem on AMD (i.e. on native CPU, not under the hypervisor). > I am not sure how many FreeBSD users are using > XEN. If this is a large base, getting a fix in before FreeBSD 8 is > released would be nice. (-: >=20 > Larry >=20 >=20 > --=20 > ------------------------------------------------------------------------ > Larry Baird | http://www.gta.com > Global Technology Associates, Inc. | Orlando, FL > Email: lab@gta.com | TEL 407-380-0220, FAX 407-380-6080 --BgdT6MQD5banEouU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkq4288ACgkQC3+MBN1Mb4hQAACg22/9H738kk/FzKkYNkLH6fFC kesAnjFvg2Ks+aS4IDp+XPNXI9DkXHkj =Jl5X -----END PGP SIGNATURE----- --BgdT6MQD5banEouU--
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