Bug 664364
| Summary: | [6.0] System reset when changing EFI variable on large memory system | ||||||
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| Product: | Red Hat Enterprise Linux 6 | Reporter: | Masayoshi Yamazaki <myamazak> | ||||
| Component: | kernel | Assignee: | Takao Indoh <tindoh> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
| Severity: | high | Docs Contact: | |||||
| Priority: | high | ||||||
| Version: | 6.0 | CC: | arozansk, cward, dhoward, jcm, lwang, qcai | ||||
| Target Milestone: | rc | Keywords: | OtherQA, ZStream | ||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| 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.
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Story Points: | --- | ||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2011-05-19 12:28:03 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 670850 | ||||||
| Attachments: |
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Looks reasonable. 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. Patch(es) available on kernel-2.6.32-128.el6
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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.
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 |
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.