Date: Wed, 4 Nov 2009 06:58:12 +0100 From: Ed Schouten <ed@80386.nl> To: Attilio Rao <attilio@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r198868 - in head/sys: amd64/amd64 i386/i386 Message-ID: <20091104055811.GY1293@hoeg.nl> In-Reply-To: <200911040132.nA41WxtQ012750@svn.freebsd.org> References: <200911040132.nA41WxtQ012750@svn.freebsd.org>
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--jk5HhkA9Kov5Oxsi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Attilio, * Attilio Rao <attilio@FreeBSD.org> wrote: > Opteron rev E family of processor expose a bug where, in very rare > ocassions, memory barriers semantic is not honoured by the hardware > itself. As a result, some random breakage can happen in uninvestigable > ways (for further explanation see at the content of the commit itself). Ooh. Sounds like an interesting bug. The bug doesn't manifest itself on UP, right? If so, maybe we should add some very short instructions to the warning on how to disable SMP. --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --jk5HhkA9Kov5Oxsi Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (FreeBSD) iEYEARECAAYFAkrxF/MACgkQ52SDGA2eCwUNSgCcDHBZ4U8o2uNTBWNKS19RrX2S rbsAnA+J5C+IzGvklU+GJcZhBhLY9a8v =TekQ -----END PGP SIGNATURE----- --jk5HhkA9Kov5Oxsi--
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