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Bug 664364 - [6.0] System reset when changing EFI variable on large memory system
Summary: [6.0] System reset when changing EFI variable on large memory system
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: Takao Indoh
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks: 670850
TreeView+ depends on / blocked
 
Reported: 2010-12-20 05:54 UTC by Masayoshi Yamazaki
Modified: 2018-11-14 15:56 UTC (History)
6 users (show)

Fixed In Version: kernel-2.6.32-128.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: 2011-05-19 12:28:03 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Fix efi pagetable (581 bytes, patch)
2011-01-13 21:28 UTC, Takao Indoh 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0542 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update 2011-05-19 11:58:07 UTC

Comment 6 Takao Indoh 2011-01-13 21:28:21 UTC 
Created attachment 473430 [details]
Fix efi pagetable

I confirmed this problem was reproduced on Fujitsu PRIMEQUEST(x86_64, uEFI-boot) with 1TB memory, and also confirmed this patch fixed the problem.
Comment 7 Jon Masters 2011-01-14 22:27:27 UTC 
Looks reasonable.
Comment 8 RHEL Program Management 2011-01-17 23:00:41 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 13 Aristeu Rozanski 2011-03-30 14:31:45 UTC 
Patch(es) available on kernel-2.6.32-128.el6
Comment 17 Martin Prpič 2011-05-05 08:55:19 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 18 errata-xmlrpc 2011-05-19 12:28:03 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-2011-0542.html
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