Bug 238709 - GATT pages must be uncacheable
Summary: GATT pages must be uncacheable
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.0
Hardware: athlon
OS: Linux
high
high
Target Milestone: ---
: ---
Assignee: Chip Coldwell
QA Contact: Martin Jenner
URL:
Whiteboard:
: 247795 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-05-02 14:30 UTC by Chip Coldwell
Modified: 2018-10-19 23:22 UTC (History)
3 users (show)

Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2007-11-07 19:48:38 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
upstream patch (1.29 KB, patch)
2007-05-02 14:31 UTC, Chip Coldwell 		no flags Details | Diff
backport of upstream patch to RHEL-5 (704 bytes, patch)
2007-05-02 14:46 UTC, Chip Coldwell 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0959 0 normal SHIPPED_LIVE Updated kernel packages for Red Hat Enterprise Linux 5 Update 1 2007-11-08 00:47:37 UTC

Description Chip Coldwell 2007-05-02 14:30:25 UTC 
The pages that store the GART PTEs must be uncacheable.  The penalty for getting
this wrong is data corruption, see RHEL-4 bug 223238.

commit cf6387daf8858bdcb3e123034ca422e8979d73f1
Author: Joachim Deguara <joachim.deguara>
Date:   Tue Apr 24 13:05:36 2007 +0200

    [PATCH] x86-64: make GART PTEs uncacheable
    
    This patches fixes the silent data corruption problems being seen using the
    GART iommu where 4kB of data where incorrect (seen mostly on Nvidia CK804
    systems).  This fix, to mark the memory regin the GART PTEs reside on as
    uncacheable, also brings the code in line with the AGP specification.
    
    Signed-off-by: Joachim Deguara <joachim.deguara>
    Signed-off-by: Andi Kleen <ak>
Comment 1 Chip Coldwell 2007-05-02 14:31:52 UTC 
Created attachment 153953 [details]
upstream patch
Comment 2 Chip Coldwell 2007-05-02 14:46:51 UTC 
Created attachment 153955 [details]
backport of upstream patch to RHEL-5
Comment 3 Chip Coldwell 2007-05-02 18:54:38 UTC 
POSTed 02-May-2007
Comment 4 RHEL Program Management 2007-05-02 21:22:26 UTC 
This request was evaluated by Red Hat Kernel Team for inclusion in a Red
Hat Enterprise Linux maintenance release, and has moved to bugzilla 
status POST.
Comment 5 Don Zickus 2007-05-09 18:25:10 UTC 
in 2.6.18-18.el5
Comment 7 Mike Gahagan 2007-09-19 18:36:04 UTC 
Confirmed the fix is in the -45.el5 kernel
Comment 9 errata-xmlrpc 2007-11-07 19:48:38 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2007-0959.html
Comment 10 Don Zickus 2008-01-24 20:31:59 UTC 
*** Bug 247795 has been marked as a duplicate of this bug. ***
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