2.6.18 Fedora core kernel gives: "Overlapping memory segments at" error

Soumendu Satapathy soumendu.satapathy at reldata.com
Tue Feb 23 11:10:26 EST 2010 

This is my .config  for the capture kernel.

 

CONFIG_KEXEC=y

CONFIG_CRASH_DUMP=y

CONFIG_PHYSICAL_START=0x2000000

 

I use crashkernel=64M at 32M.

 

Thanks

Soumendu

 

From: Soumendu Satapathy 
Sent: Tuesday, February 23, 2010 11:07 AM
To: Kexec Mailing List
Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
at" error

 

Hi there,

 

When I use a 2.6.27 Fedora core I am able to load a capture kernel
properly and it boots when the first kernel crashes.

I am using a x86_64 platform and 2.6.27 Fedora core.

 

I use crashkernel=64M at 32M.

 

But when I use a 2.6.18 in the same environment and settings as above, I
get the following error when I load a capture kernel:-

 

"Overlapping memory segments at"  error

"Sort segments failed"

 

I found that the kernel segments overlap when loading them in the 64M
memory reserved for the capture kernel. My system memory is MemTotal:
8037944 kB

 

I am using kexec-tools-2.0.1 and the "cat /proc/iomem"  o/p is as
follows.

 

00000000-0009b3ff : System RAM

0009b400-0009ffff : reserved

000e4000-000fffff : reserved

00100000-cff6ffff : System RAM

  00200000-006f0747 : Kernel code

  006f0748-009b9b3f : Kernel data

  00be2000-01219ea7 : Kernel bss

  02000000-05ffffff : Crash kernel

cff70000-cff77fff : ACPI Tables

cff78000-cff7ffff : ACPI Non-volatile Storage

cff80000-cfffffff : reserved

d1000000-d11fffff : PCI Bus 0000:01

  d1000000-d10fffff : PCI Bus 0000:02

    d1000000-d107ffff : 0000:02:03.0

    d1080000-d10fffff : 0000:02:03.1

  d1100000-d11fffff : PCI Bus 0000:03

    d1100000-d113ffff : 0000:03:02.0

    d1140000-d117ffff : 0000:03:02.1

d1200000-d12fffff : PCI Bus 0000:04

  d1200000-d12fffff : PCI Bus 0000:05

    d1200000-d120ffff : 0000:05:04.0

d1300000-d13fffff : PCI Bus 0000:06

  d1300000-d13fffff : PCI Bus 0000:07

    d1300000-d130ffff : 0000:07:04.0

d1400000-d14fffff : PCI Bus 0000:09

  d1400000-d141ffff : 0000:09:01.0

d1500000-d15003ff : 0000:00:1f.1

dd000000-dd000fff : 0000:00:01.0

dd001000-dd00100f : 0000:00:1d.4

dd001400-dd0017ff : 0000:00:1d.7

  dd001400-dd0017ff : ehci_hcd

dd100000-dd3fffff : PCI Bus 0000:01

  dd100000-dd100fff : 0000:01:00.1

  dd101000-dd101fff : 0000:01:00.3

  dd200000-dd2fffff : PCI Bus 0000:02

    dd200000-dd201fff : 0000:02:03.0

    dd202000-dd203fff : 0000:02:03.1

  dd300000-dd3fffff : PCI Bus 0000:03

    dd300000-dd300fff : 0000:03:02.0

    dd301000-dd301fff : 0000:03:02.1

dd400000-dd4fffff : PCI Bus 0000:04

  dd400000-dd4fffff : PCI Bus 0000:05

    dd400000-dd40ffff : 0000:05:04.0

      dd400000-dd40ffff : tg3

    dd410000-dd41ffff : 0000:05:04.0

      dd410000-dd41ffff : tg3

    dd420000-dd42ffff : 0000:05:04.1

      dd420000-dd42ffff : tg3

    dd430000-dd43ffff : 0000:05:04.1

      dd430000-dd43ffff : tg3

dd500000-dd5fffff : PCI Bus 0000:06

  dd500000-dd5fffff : PCI Bus 0000:07

    dd500000-dd50ffff : 0000:07:04.0

      dd500000-dd50ffff : tg3

    dd510000-dd51ffff : 0000:07:04.0

      dd510000-dd51ffff : tg3

    dd520000-dd52ffff : 0000:07:04.1

      dd520000-dd52ffff : tg3

    dd530000-dd53ffff : 0000:07:04.1

      dd530000-dd53ffff : tg3

dd600000-dd6fffff : PCI Bus 0000:08

  dd600000-dd61ffff : 0000:08:01.0

    dd600000-dd61ffff : e1000

  dd620000-dd63ffff : 0000:08:02.0

    dd620000-dd63ffff : e1000

dd700000-deffffff : PCI Bus 0000:09

  dd700000-dd700fff : 0000:09:01.0

  de000000-deffffff : 0000:09:01.0

e0000000-efffffff : PCI MMCONFIG 0

  e0000000-efffffff : reserved

fec00000-fec0ffff : reserved

  fec00000-fec00fff : IOAPIC 0

fec10000-fec10fff : IOAPIC 1

fec80000-fec80fff : IOAPIC 2

fee00000-fee00fff : Local APIC

  fee00000-fee00fff : reserved

ff800000-ffbfffff : reserved

fffffc00-ffffffff : reserved

100000000-22fffffff : System RAM

 

Could it be a bug in the Kexec? 

 

thanks

Soumendu S Satapathy

Senior Software Developer

RELDATA Inc.

1719 Route 10, Suite 209

Parsippany, NJ 07054

(973) 644-2770  ext. 139  office

732-692-7230 mobile

(973) 644-3385 fax

soumendu.satapathy at reldata.com

www.reldata.com <http://www.reldata.com/> 

 

 

 

Soumendu S Satapathy

Senior Software Developer

RELDATA Inc.

1719 Route 10, Suite 209

Parsippany, NJ 07054

(973) 644-2770  ext. 139  office

732-692-7230 mobile

(973) 644-3385 fax

soumendu.satapathy at reldata.com

www.reldata.com <http://www.reldata.com/> 

 

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