Bug 670850 – [6.0] System reset when changing EFI variable on large memory system [rhel-6.0.z]

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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....

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.0
Hardware:	x86_64 Linux

Priority	high Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	Frantisek Hrbata
QA Contact:	Red Hat Kernel QE team
Docs Contact:

URL:
Whiteboard:
Keywords:	OtherQA, ZStream

Depends On:	664364
Blocks:
	Show dependency tree / graph

Reported:	2011-01-19 09:33 EST by RHEL Product and Program Management
Modified:	2011-05-10 14:12 EDT (History)
CC List:	12 users (show)

See Also:
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.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-10 14:12:11 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0498	normal	SHIPPED_LIVE	Important: kernel security, bug fix, and enhancement update	2011-05-10 14:10:04 EDT

Groups: None (edit)

Description RHEL Product and Program Management 2011-01-19 09:33:25 EST

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 04:55:12 EDT

    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 14:12:11 EDT

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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