4.3Ghz prozessoren von Intel ?

[Florian Lohoff]

Sehr nettes mailing auf der linux-kernel mailingliste von einem intel
techniker :)

----- Forwarded message from Wayne Scott <wscott at ichips.intel.com> -----

To: linux-kernel at vger.rutgers.edu
Subject: Linux fails to boot on a "theoretical" 4.3 Ghz x86 [PATCH]
Message-Id: <20000320150610R.wscott at ichips.intel.com>
Date:	Mon, 20 Mar 2000 15:06:10 -0800
From: Wayne Scott <wscott at ichips.intel.com>


Working in the lab, we have found a bug where Linux 2.2.14 fails to
boot if a x86 processor is faster than 4.3Ghz.  This is caused because
it uses the rdtsc to calculate the processor speed in hz.  Since the
result is a 32-bit number, the frequency can not be allowed to be
> 2**32.

Enclosed is a simple patch make calculates cpu_khz instead of cpu_hz.
Please include this in the kernel source.

Think of this as a Y2K-like bug waiting to happen, I want Linux to be
ready. :)

PS: We do NOT have a processor running this fast, just one that lies
    to the OS.

Wayne Scott		        WMT Architecture - Intel Corp.
wscott at ichips.intel.com		Work #: (503) 613-5063
Disclaimer:  All views expressed are my own opinions, and not necessarily 
             those of Intel Corporation.

diff -ur kernel-source-2.2.14/arch/i386/kernel/setup.c ../kernel-source-2.2.14-kni/arch/i386/kernel/setup.c

[...]
----- End forwarded message -----

-- 
Florian Lohoff		flo at rfc822.org		      	+49-subject-2-change
"Technology is a constant battle between manufacturers producing bigger and
more idiot-proof systems and nature producing bigger and better idiots."


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