From mboxrd@z Thu Jan 1 00:00:00 1970 From: benh@kernel.crashing.org To: Christopher Murtagh , Subject: Re: SMP/HIGHMEM/7450 status ? Date: Thu, 6 Jun 2002 19:45:30 +0200 Message-Id: <20020606174530.22442@mailhost.mipsys.com> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: > >On Thu, 6 Jun 2002 benh@kernel.crashing.org wrote: >>Xserve uses 7455 (like newer dual G4s), which doesn't seem to exhibit >>the problem. > > Damn... does this mean that the 7450 machines are lemons (wouldn't >surprise me if the answer was a resounding 'yes')? I can't say for sure. It seems we are hitting a CPU bug, but after studying the errata and trying all sort of ways to "catch" the dead CPU when the lockup happen, I had to give up. It seems even tweaking the CPU reset line won't get it back from the deadlock situation (I'm tweaking it using the firewire controller tapping Apple's KeyLargo ASIC GPIO registers, this works fine when the CPU isn't locked up in this state). > herrenschmidt.wcg.mcgill.ca hehe, nice ;) though I wouldn't like having to type that name every day to telnet to the box ;) Ben. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/