Bug 218470 - initrd not loaded with > 4 GB and PAE kernel
initrd not loaded with > 4 GB and PAE kernel
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Kernel Maintainer List
Brian Brock
Depends On:
Blocks: 427887
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Reported: 2006-12-05 11:33 EST by Diego Santa Cruz
Modified: 2008-02-07 23:28 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2008-02-07 23:28:50 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Diego Santa Cruz 2006-12-05 11:33:39 EST
Description of problem:

PAE enabled Kernel does not boot since it cannot find initrd on a machine with
4GB of memory.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Attempt to boot kernel on system with > 4 GB, with initrd, from GRUB
Actual results:
Kernel does not find initrd image (initramfs) and panics since it cannot find init.

Additional info:
The machine has 4 GB of memory, but the upper 2 GB are mapped above the 4 GB

Adding "mem=4096M" to the kernel command line overcomes the problems, but
disables the upper 2GB of memory. 

BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009ec00 (usable)
 BIOS-e820: 000000000009ec00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000007ffa0000 (usable)
 BIOS-e820: 000000007ffa0000 - 000000007ffae000 (ACPI data)
 BIOS-e820: 000000007ffae000 - 000000007ffe0000 (ACPI NVS)
 BIOS-e820: 000000007ffe0000 - 0000000080000000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
 BIOS-e820: 0000000100000000 - 0000000180000000 (usable)

GRUB config:

title Fedora Core (2.6.18-1.2849.fc6PAE)
        root (hd0,0)
        kernel /boot/vmlinuz-2.6.18-1.2849.fc6PAE ro root=/dev/md0 rhgb quiet
        initrd /boot/initrd-2.6.18-1.2849.fc6PAE.img
Comment 1 Jon Stanley 2008-01-07 20:50:39 EST
(This is a mass-update to all current FC6 kernel bugs in NEW state)


I'm reviewing this bug list as part of the kernel bug triage project, an attempt
to isolate current bugs in the Fedora kernel.


I am CC'ing myself to this bug, however this version of Fedora is no longer

Please attempt to reproduce this bug with a current version of Fedora (presently
Fedora 8). If the bug no longer exists, please close the bug or I'll do so in a
few days if there is no further information lodged.

Thanks for using Fedora!
Comment 2 Jon Stanley 2008-02-07 23:28:50 EST
Per the previous comment in this bug, I am closing it as INSUFFICIENT_DATA,
since no information has been lodged for over 30 days.

Please re-open this bug or file a new one if you can provide the requested data,
and thanks for filing the original report!

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