Bug 220143 - kexec installation of kernel fails due to overlapping segment detection
kexec installation of kernel fails due to overlapping segment detection
Status: CLOSED DUPLICATE of bug 238768
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
x86_64 Linux
medium Severity urgent
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Assigned To: Kernel Maintainer List
Brian Brock
Depends On:
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Reported: 2006-12-19 01:22 EST by gdelx001
Modified: 2007-11-30 17:11 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2007-05-31 16:26:27 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description gdelx001 2006-12-19 01:22:42 EST
Description of problem:
Forcing dump under kdump failed with explanation that dump kernel wasn't
installed, so investigated manually installing dump kernel.  Oh, and yes, there
was a properly formed crashkernel=128M@16M option on the boot commandline, plus
the appropriate region appeared carved out in /proc/iomem.

Using the kexec installation line from /etc/init.d/kdump:
/sbin/kexec -p --args-linux --command-line="ro root=/dev/VolGroup00/LogVol00
rhgb quiet" --initrd=/boot/initrd-2.6.18-1.2868.fc6kdump.img

I got the message:

Overlapping memory segments at 0x1460000
sort_segments failed

This may be similar or identical to a bug reported against kexec w/ x86-64 on
the fastboot mailing list around the beginning of October, and may require
tweaking the dump kernel.

This was reported against kexec-tools as #216171, and then forwarded to kernel
maintainers at that time:

------- Additional Comments From nhorman@redhat.com  2006-11-21 11:44 EST -------
Hey!  Thanks for the report.  This is actually a kernel bug though, that results
from overlapping physical address for program headers getting written into the
compiled kdump kernel.  you need this patch for your kernel:

It just got added to Linus' tree today, so I expect Dave J. will have it in the
FC-6 kernel shortly.

This fresh _new_ kernel release has _the same problem_ as the previous release!

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

How reproducible:

Steps to Reproduce:
1. run kexec line above
Actual results:
Overlapping memory segments at 0x1460000
sort_segments failed

Expected results:
an installed crash kernel

Additional info:
Comment 1 Neil Horman 2007-05-31 16:26:27 EDT
The overlapping segments issue should be fixed with kexec-tools-1.101-56.fc6,
due out in a few days.  however the x86_64 rpm still has an issue with loading
due to an alternate kernel problem (one in which /proc/kcore returns EPERM for
all users universally), blocking the load operation.  That is being tracked in
bz 241362

*** This bug has been marked as a duplicate of 238768 ***

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