Bug 670850 - [6.0] System reset when changing EFI variable on large memory system [rhel-6.0.z]
Summary: [6.0] System reset when changing EFI variable on large memory system [rhel-6....
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: x86_64
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Frantisek Hrbata
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On: 664364
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-01-19 14:33 UTC by RHEL Program Management
Modified: 2018-11-14 15:56 UTC (History)
12 users (show)

Fixed In Version: kernel-2.6.32-71.26.1.el6
Doc Type: Bug Fix
Doc Text:
Invocating an EFI (Extensible Firmware Interface) call caused a restart or a failure to boot to occur on a system with more than 512GB of memory because the EFI page tables did not map the whole kernel space. EFI page tables used only one PGD (Page Global Directory) entry to map the kernel space; thus, virtual addresses higher than PAGE_OFFSET + 512GB could not be accessed. With this update, EFI page tables map the whole kernel space.
Clone Of:
Environment:
Last Closed: 2011-05-10 18:12:11 UTC
Target Upstream Version:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0498 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2011-05-10 18:10:04 UTC

Description RHEL Program Management 2011-01-19 14:33:25 UTC 
This bug has been copied from bug #664364 and has been proposed
to be backported to 6.0 z-stream (EUS).
Comment 7 Martin Prpič 2011-05-05 08:55:12 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Invocating an EFI (Extensible Firmware Interface) call caused a restart or a failure to boot to occur on a system with more than 512GB of memory because the EFI page tables did not map the whole kernel space. EFI page tables used only one PGD (Page Global Directory) entry to map the kernel space; thus, virtual addresses higher than PAGE_OFFSET + 512GB could not be accessed. With this update, EFI page tables map the whole kernel space.
Comment 9 errata-xmlrpc 2011-05-10 18:12:11 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 therefore 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/RHSA-2011-0498.html
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