From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt To: "Timothy A. Seufert" , Christopher Murtagh , Subject: Re: SMP/HIGHMEM/7450 status ? Date: Thu, 6 Jun 2002 21:46:36 +0200 Message-Id: <20020606194636.7979@smtp.wanadoo.fr> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: >Apple did hold off on dual 7450 until rev 2.1 came out and fixed some >of the nastier SMP errata, so presumably they at least thought there >were no SMP showstoppers left in rev 2.1. As far as I can tell they >are pretty stable under OS X. There is an SMP showstopper with HW hashtable walk, but Apple claims to have a HW workaround. >Linux is probably just missing some deep magic needed for working >around one or more of the errata that do still apply to rev 2.1. The >trouble is figuring out exactly what's wrong... it can be VERY >difficult to understand all the ramifications of a CPU bug >(particularly a SMP related bug) until you use a bus analyzer to >snapshot bus traffic during a crash, or probe CPU registers via JTAG >after it has crashed, etc. Especially since you don't have the connector on the motherboard to put such a tool, and since I don't even have physical access to any of these machines. Ben. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/