Re: [Fedora-ia64-list] kernel 2.6.16-1.2097_FC6 unbootable on Itanium

David Mosberger-Tang
2006-03-30T15:53:56Z

On 3/30/06, Jack Steiner <steiner@sgi.com> wrote:
> On Thu, Mar 30, 2006 at 08:43:43AM -0700, David Mosberger-Tang wrote:
> > (and at least in theory, it should cause an MCA even on
> > real hardware).
>
> It does, at least on our chipset. If the chipset detects a simultaneous
> UC & C reference, it generates a BUS error. It is surprising how
> quickly this MCA occurs when we break the rules.

That's good. While MCAs are a pain, it's a lot better than having to
track down data corruption due to (in-)coherency.

--david
--
Mosberger Consulting LLC, http://www.mosberger-consulting.com/