Bug 21572

Summary: Write allocate/MTRR's not enabled for K6-2+
Product: [Retired] Red Hat Linux Reporter: John Gotts <jgotts>
Component: kernelAssignee: Michael K. Johnson <johnsonm>
Status: CLOSED CURRENTRELEASE QA Contact: Brock Organ <borgan>
Severity: medium Docs Contact:
Priority: low    
Version: 6.2Keywords: FutureFeature
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Hardware: i586   
OS: Linux   
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Fixed In Version: Doc Type: Enhancement
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Clone Of: Environment:
Last Closed: 2002-12-15 04:06:14 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description John Gotts 2000-12-01 07:00:29 UTC 
2.2.16 doesn't enable write allocate or MTRR's for machines with the K6-2+
processor.  Write allocate is cited as an important performance item to
enable on the various motherboard related newsgroups.  Many people are
installing K6-2+'s on boards that support the chip's electrical
requirements but don't adequately set it up in the BIOS.  New laptops
appearing on the market that contain this chip may or may not have the same
problem.  My patch is tiny and was extracted from 2.2.18pre.  My source RPM
is at http://linuxsavvy.com/staff/jgotts/k6-2+/kernel-2.2.16-4.src.rpm and
two much more detailed messages were sent to redhat-list today.  It might
be nice to slip this patch into the next bug fix kernel RPM's for 6.2 and
7.0 unless 2.2.18 is out by then.