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* FW: 2.6.18 Fedora core kernel gives: "Overlapping memory segments at" error
@ 2010-02-23 21:32 Soumendu Satapathy
  2010-02-23 21:50 ` Vivek Goyal
  0 siblings, 1 reply; 6+ messages in thread
From: Soumendu Satapathy @ 2010-02-23 21:32 UTC (permalink / raw)
  To: Vivek Goyal; +Cc: Kexec Mailing List


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Hi Vivek,

 

Is it a bug? Its works for 2.6.27 but fails for 2.6.18 kernel. However I
use the vmlinuz image as a capture kernel in case of 2.6.27 as it does
not complain of relocatable kernel with it.

 

I am using a vmlinux kernel image to load as it complains  vmlinuz image
for not being relocatable in case of 2.6.18.

 

I get the following error:-

 

Overlapping memory segments at  0x27f7000

"sort_segments failed"

 

 

Thanks

Soumendu

 

From: Soumendu Satapathy 
Sent: Tuesday, February 23, 2010 11:10 AM
To: Kexec Mailing List
Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
at" error

 

This is my .config  for the capture kernel.

 

CONFIG_KEXEC=y

CONFIG_CRASH_DUMP=y

CONFIG_PHYSICAL_START=0x2000000

 

I use crashkernel=64M@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@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@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@reldata.com

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

 


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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping memory segments at" error
  2010-02-23 21:32 FW: 2.6.18 Fedora core kernel gives: "Overlapping memory segments at" error Soumendu Satapathy
@ 2010-02-23 21:50 ` Vivek Goyal
  2010-02-23 22:17   ` FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments " Soumendu Satapathy
  2010-02-23 22:31   ` Soumendu Satapathy
  0 siblings, 2 replies; 6+ messages in thread
From: Vivek Goyal @ 2010-02-23 21:50 UTC (permalink / raw)
  To: Soumendu Satapathy; +Cc: Kexec Mailing List

On Tue, Feb 23, 2010 at 04:32:59PM -0500, Soumendu Satapathy wrote:
> Hi Vivek,
> 
>  
> 
> Is it a bug? Its works for 2.6.27 but fails for 2.6.18 kernel. However I
> use the vmlinuz image as a capture kernel in case of 2.6.27 as it does
> not complain of relocatable kernel with it.
> 
>  
> 
> I am using a vmlinux kernel image to load as it complains  vmlinuz image
> for not being relocatable in case of 2.6.18.
> 
>  
> 
> I get the following error:-
> 
>  
> 
> Overlapping memory segments at  0x27f7000
> 
> "sort_segments failed"
> 

Can you post the output of "readelf -l vmlinux" just curious if vmlinux
is reporting somehow overlappig memory segments. But you seem to be
suggesting that that same vmlinux works with older version of kexec-tools?
If yes, then it sounds like we introduced some bug in newer version of
kexec-tools.

What is your environemnt? I mean what is your production kernel. Are you
running 2.6.18 as production kernel and trying out loading 2.6.27 and
2.6.18  as capture kernel, or you have 2.6.27 as production kernel and
trying out 2.6.27 and 2.6.18 as capture kernel. Not that it matters much
at this point of time, just curious.

So I would begin with trying to load 2.6.18 vmlinux with older version
of kexec-tools.

Is this 2.6.18 vmlinux relocatable?

Thanks
Vivek

>  
> 
>  
> 
> Thanks
> 
> Soumendu
> 
>  
> 
> From: Soumendu Satapathy 
> Sent: Tuesday, February 23, 2010 11:10 AM
> To: Kexec Mailing List
> Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
> at" error
> 
>  
> 
> This is my .config  for the capture kernel.
> 
>  
> 
> CONFIG_KEXEC=y
> 
> CONFIG_CRASH_DUMP=y
> 
> CONFIG_PHYSICAL_START=0x2000000
> 
>  
> 
> I use crashkernel=64M@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@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@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@reldata.com
> 
> www.reldata.com <http://www.reldata.com/> 
> 
>  
> 

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

^ permalink raw reply	[flat|nested] 6+ messages in thread
* RE: FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments at" error
  2010-02-23 21:50 ` Vivek Goyal
@ 2010-02-23 22:17   ` Soumendu Satapathy
  2010-02-23 22:36     ` Vivek Goyal
  2010-02-23 22:31   ` Soumendu Satapathy
  1 sibling, 1 reply; 6+ messages in thread
From: Soumendu Satapathy @ 2010-02-23 22:17 UTC (permalink / raw)
  To: Vivek Goyal; +Cc: Kexec Mailing List

$ readelf -l vmlinux

Elf file type is EXEC (Executable file)
Entry point 0x2000100
There are 4 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000200000 0xffffffff82000000
0x0000000002000000
                 0x0000000000658608 0x0000000000658608  R E    200000
  LOAD           0x0000000000859000 0xffffffff82659000
0x0000000002659000
                 0x0000000000111085 0x000000000019d6b0  RWE    200000
  LOAD           0x0000000000a00000 0xffffffffff600000
0x000000000272d000
                 0x0000000000000c08 0x0000000000000c08  RWE    200000
  NOTE           0x0000000000000000 0x0000000000000000
0x0000000000000000
                 0x0000000000000000 0x0000000000000000  R      8

 Section to Segment mapping:
  Segment Sections...
   00     .text __ex_table .rodata .pci_fixup __ksymtab __ksymtab_gpl
__ksymtab_gpl_future __kcrctab __kcrctab_gpl __kcrctab_gpl_future
__ksymtab_strings __param .eh_frame
   01     .data .data.cacheline_aligned .data.read_mostly
.data.init_task .data.page_aligned .init.text .init.data .init.setup
.initcall.init .con_initcall.init .security_initcall.init
.altinstructions .altinstr_replacement .exit.text .init.ramfs .bss
   02     .vsyscall_0 .xtime_lock .vxtime .wall_jiffies .sys_tz
.sysctl_vsyscall .xtime .jiffies .vsyscall_1 .vsyscall_2 .vsyscall_3
   03




I did two tests one with 2.6.27 x86_64 Fedora core and the other with
2.6.18 x86_64 Fedora core. I use kexec-tools-2.0.1 for all the tests.

With 2.6.27, I use the vmlinuz image as the first kernel. I make a
relocatable kernel by setting the required config options for the
capture kernel.
I use the same 2.6.27 kernel for both the first and the capture kernel.
In 2.6.27, the use vmlinuz image which I have made relocatable as a
capture kernel and I load it. It works fine. 


With 2,6,18, I use the vmlinuz image as the first kernel. I use the same
2.6.18 as the capture kernel. I don't find an option or config option
here to 
make the capture kernel as RELOCATABLE as I find a default config option
in 2.6.27 i.e CONFIG_RELOCATABLE=y. When I load the vmlinuz in this case
it complains of not being RELOCATABLE. So in 2.6.18, I use the vmlinux
image as the capture kernel and loads it. 

While loading the 2.6.18 vmlinux image ( the capture kernel ), it throws
the following error:-
 Overlapping memory segments at  0x27f7000

 "sort_segments failed"


I think if I could have used the vmlinuz image as the capture kernel in
case of 2.6.18, probably it will work. But since I am not able to make
that relocatable I had to use the vmlinux imgae as the capture kernel in
case of 2.6.18. 

How can I make the 2.6.18 kernel RELOCATABLE, is there a config option ?
if yes, please let me know and I will give it a try to see if the
problem persists or not. If not, then I am afraid there could be some
bug.

Thanks
Soumendu

-----Original Message-----
From: Vivek Goyal [mailto:vgoyal@redhat.com] 
Sent: Tuesday, February 23, 2010 4:51 PM
To: Soumendu Satapathy
Cc: Kexec Mailing List
Subject: Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping
memorysegments at" error

On Tue, Feb 23, 2010 at 04:32:59PM -0500, Soumendu Satapathy wrote:
> Hi Vivek,
> 
>  
> 
> Is it a bug? Its works for 2.6.27 but fails for 2.6.18 kernel. However
I
> use the vmlinuz image as a capture kernel in case of 2.6.27 as it does
> not complain of relocatable kernel with it.
> 
>  
> 
> I am using a vmlinux kernel image to load as it complains  vmlinuz
image
> for not being relocatable in case of 2.6.18.
> 
>  
> 
> I get the following error:-
> 
>  
> 
> Overlapping memory segments at  0x27f7000
> 
> "sort_segments failed"
> 

Can you post the output of "readelf -l vmlinux" just curious if vmlinux
is reporting somehow overlappig memory segments. But you seem to be
suggesting that that same vmlinux works with older version of
kexec-tools?
If yes, then it sounds like we introduced some bug in newer version of
kexec-tools.

What is your environemnt? I mean what is your production kernel. Are you
running 2.6.18 as production kernel and trying out loading 2.6.27 and
2.6.18  as capture kernel, or you have 2.6.27 as production kernel and
trying out 2.6.27 and 2.6.18 as capture kernel. Not that it matters much
at this point of time, just curious.

So I would begin with trying to load 2.6.18 vmlinux with older version
of kexec-tools.

Is this 2.6.18 vmlinux relocatable?

Thanks
Vivek

>  
> 
>  
> 
> Thanks
> 
> Soumendu
> 
>  
> 
> From: Soumendu Satapathy 
> Sent: Tuesday, February 23, 2010 11:10 AM
> To: Kexec Mailing List
> Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
> at" error
> 
>  
> 
> This is my .config  for the capture kernel.
> 
>  
> 
> CONFIG_KEXEC=y
> 
> CONFIG_CRASH_DUMP=y
> 
> CONFIG_PHYSICAL_START=0x2000000
> 
>  
> 
> I use crashkernel=64M@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@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@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@reldata.com
> 
> www.reldata.com <http://www.reldata.com/> 
> 
>  
> 

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

^ permalink raw reply	[flat|nested] 6+ messages in thread
* RE: FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments at" error
  2010-02-23 21:50 ` Vivek Goyal
  2010-02-23 22:17   ` FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments " Soumendu Satapathy
@ 2010-02-23 22:31   ` Soumendu Satapathy
  2010-02-23 22:37     ` Vivek Goyal
  1 sibling, 1 reply; 6+ messages in thread
From: Soumendu Satapathy @ 2010-02-23 22:31 UTC (permalink / raw)
  To: Soumendu Satapathy, Vivek Goyal; +Cc: Kexec Mailing List

Well the Entry point in the readelf shows 0x2000100.  But the physical
start address that I specified in the .config file for the capture
kernel is CONFIG_PHYSICAL_START=0x2000000.

I am just wondering, could it be an issue ?

Thanks
Soumendu


-----Original Message-----
From: Soumendu Satapathy 
Sent: Tuesday, February 23, 2010 5:17 PM
To: 'Vivek Goyal'
Cc: Kexec Mailing List
Subject: RE: FW: 2.6.18 Fedora core kernel gives: "Overlapping
memorysegments at" error

$ readelf -l vmlinux

Elf file type is EXEC (Executable file)
Entry point 0x2000100
There are 4 program headers, starting at offset 64

Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000200000 0xffffffff82000000
0x0000000002000000
                 0x0000000000658608 0x0000000000658608  R E    200000
  LOAD           0x0000000000859000 0xffffffff82659000
0x0000000002659000
                 0x0000000000111085 0x000000000019d6b0  RWE    200000
  LOAD           0x0000000000a00000 0xffffffffff600000
0x000000000272d000
                 0x0000000000000c08 0x0000000000000c08  RWE    200000
  NOTE           0x0000000000000000 0x0000000000000000
0x0000000000000000
                 0x0000000000000000 0x0000000000000000  R      8

 Section to Segment mapping:
  Segment Sections...
   00     .text __ex_table .rodata .pci_fixup __ksymtab __ksymtab_gpl
__ksymtab_gpl_future __kcrctab __kcrctab_gpl __kcrctab_gpl_future
__ksymtab_strings __param .eh_frame
   01     .data .data.cacheline_aligned .data.read_mostly
.data.init_task .data.page_aligned .init.text .init.data .init.setup
.initcall.init .con_initcall.init .security_initcall.init
.altinstructions .altinstr_replacement .exit.text .init.ramfs .bss
   02     .vsyscall_0 .xtime_lock .vxtime .wall_jiffies .sys_tz
.sysctl_vsyscall .xtime .jiffies .vsyscall_1 .vsyscall_2 .vsyscall_3
   03




I did two tests one with 2.6.27 x86_64 Fedora core and the other with
2.6.18 x86_64 Fedora core. I use kexec-tools-2.0.1 for all the tests.

With 2.6.27, I use the vmlinuz image as the first kernel. I make a
relocatable kernel by setting the required config options for the
capture kernel.
I use the same 2.6.27 kernel for both the first and the capture kernel.
In 2.6.27, the use vmlinuz image which I have made relocatable as a
capture kernel and I load it. It works fine. 


With 2,6,18, I use the vmlinuz image as the first kernel. I use the same
2.6.18 as the capture kernel. I don't find an option or config option
here to 
make the capture kernel as RELOCATABLE as I find a default config option
in 2.6.27 i.e CONFIG_RELOCATABLE=y. When I load the vmlinuz in this case
it complains of not being RELOCATABLE. So in 2.6.18, I use the vmlinux
image as the capture kernel and loads it. 

While loading the 2.6.18 vmlinux image ( the capture kernel ), it throws
the following error:-
 Overlapping memory segments at  0x27f7000

 "sort_segments failed"


I think if I could have used the vmlinuz image as the capture kernel in
case of 2.6.18, probably it will work. But since I am not able to make
that relocatable I had to use the vmlinux imgae as the capture kernel in
case of 2.6.18. 

How can I make the 2.6.18 kernel RELOCATABLE, is there a config option ?
if yes, please let me know and I will give it a try to see if the
problem persists or not. If not, then I am afraid there could be some
bug.

Thanks
Soumendu

-----Original Message-----
From: Vivek Goyal [mailto:vgoyal@redhat.com] 
Sent: Tuesday, February 23, 2010 4:51 PM
To: Soumendu Satapathy
Cc: Kexec Mailing List
Subject: Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping
memorysegments at" error

On Tue, Feb 23, 2010 at 04:32:59PM -0500, Soumendu Satapathy wrote:
> Hi Vivek,
> 
>  
> 
> Is it a bug? Its works for 2.6.27 but fails for 2.6.18 kernel. However
I
> use the vmlinuz image as a capture kernel in case of 2.6.27 as it does
> not complain of relocatable kernel with it.
> 
>  
> 
> I am using a vmlinux kernel image to load as it complains  vmlinuz
image
> for not being relocatable in case of 2.6.18.
> 
>  
> 
> I get the following error:-
> 
>  
> 
> Overlapping memory segments at  0x27f7000
> 
> "sort_segments failed"
> 

Can you post the output of "readelf -l vmlinux" just curious if vmlinux
is reporting somehow overlappig memory segments. But you seem to be
suggesting that that same vmlinux works with older version of
kexec-tools?
If yes, then it sounds like we introduced some bug in newer version of
kexec-tools.

What is your environemnt? I mean what is your production kernel. Are you
running 2.6.18 as production kernel and trying out loading 2.6.27 and
2.6.18  as capture kernel, or you have 2.6.27 as production kernel and
trying out 2.6.27 and 2.6.18 as capture kernel. Not that it matters much
at this point of time, just curious.

So I would begin with trying to load 2.6.18 vmlinux with older version
of kexec-tools.

Is this 2.6.18 vmlinux relocatable?

Thanks
Vivek

>  
> 
>  
> 
> Thanks
> 
> Soumendu
> 
>  
> 
> From: Soumendu Satapathy 
> Sent: Tuesday, February 23, 2010 11:10 AM
> To: Kexec Mailing List
> Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
> at" error
> 
>  
> 
> This is my .config  for the capture kernel.
> 
>  
> 
> CONFIG_KEXEC=y
> 
> CONFIG_CRASH_DUMP=y
> 
> CONFIG_PHYSICAL_START=0x2000000
> 
>  
> 
> I use crashkernel=64M@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@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@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@reldata.com
> 
> www.reldata.com <http://www.reldata.com/> 
> 
>  
> 

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments at" error
  2010-02-23 22:17   ` FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments " Soumendu Satapathy
@ 2010-02-23 22:36     ` Vivek Goyal
  0 siblings, 0 replies; 6+ messages in thread
From: Vivek Goyal @ 2010-02-23 22:36 UTC (permalink / raw)
  To: Soumendu Satapathy; +Cc: Kexec Mailing List

On Tue, Feb 23, 2010 at 05:17:29PM -0500, Soumendu Satapathy wrote:
> $ readelf -l vmlinux
> 
> Elf file type is EXEC (Executable file)
> Entry point 0x2000100
> There are 4 program headers, starting at offset 64
> 
> Program Headers:
>   Type           Offset             VirtAddr           PhysAddr
>                  FileSiz            MemSiz              Flags  Align
>   LOAD           0x0000000000200000 0xffffffff82000000
> 0x0000000002000000
>                  0x0000000000658608 0x0000000000658608  R E    200000
>   LOAD           0x0000000000859000 0xffffffff82659000
> 0x0000000002659000
>                  0x0000000000111085 0x000000000019d6b0  RWE    200000
>   LOAD           0x0000000000a00000 0xffffffffff600000
> 0x000000000272d000
>                  0x0000000000000c08 0x0000000000000c08  RWE    200000
>   NOTE           0x0000000000000000 0x0000000000000000
> 0x0000000000000000
>                  0x0000000000000000 0x0000000000000000  R      8
> 
>  Section to Segment mapping:
>   Segment Sections...
>    00     .text __ex_table .rodata .pci_fixup __ksymtab __ksymtab_gpl
> __ksymtab_gpl_future __kcrctab __kcrctab_gpl __kcrctab_gpl_future
> __ksymtab_strings __param .eh_frame
>    01     .data .data.cacheline_aligned .data.read_mostly
> .data.init_task .data.page_aligned .init.text .init.data .init.setup
> .initcall.init .con_initcall.init .security_initcall.init
> .altinstructions .altinstr_replacement .exit.text .init.ramfs .bss
>    02     .vsyscall_0 .xtime_lock .vxtime .wall_jiffies .sys_tz
> .sysctl_vsyscall .xtime .jiffies .vsyscall_1 .vsyscall_2 .vsyscall_3
>    03
> 
> 
> 
> 
> I did two tests one with 2.6.27 x86_64 Fedora core and the other with
> 2.6.18 x86_64 Fedora core. I use kexec-tools-2.0.1 for all the tests.
> 
> With 2.6.27, I use the vmlinuz image as the first kernel. I make a
> relocatable kernel by setting the required config options for the
> capture kernel.
> I use the same 2.6.27 kernel for both the first and the capture kernel.
> In 2.6.27, the use vmlinuz image which I have made relocatable as a
> capture kernel and I load it. It works fine. 
> 
> 
> With 2,6,18, I use the vmlinuz image as the first kernel. I use the same
> 2.6.18 as the capture kernel. I don't find an option or config option
> here to 
> make the capture kernel as RELOCATABLE as I find a default config option
> in 2.6.27 i.e CONFIG_RELOCATABLE=y. When I load the vmlinuz in this case
> it complains of not being RELOCATABLE. So in 2.6.18, I use the vmlinux
> image as the capture kernel and loads it. 
> 
> While loading the 2.6.18 vmlinux image ( the capture kernel ), it throws
> the following error:-
>  Overlapping memory segments at  0x27f7000
> 
>  "sort_segments failed"

The highest vmlinux segment is at address 0x000000000272d000 of size c08.
So it should not be the conflicting setment. I guess that some of the
internally generated and placed segments are having conflict because of
some bug.

> 
> 
> I think if I could have used the vmlinuz image as the capture kernel in
> case of 2.6.18, probably it will work. But since I am not able to make
> that relocatable I had to use the vmlinux imgae as the capture kernel in
> case of 2.6.18. 
> 
> How can I make the 2.6.18 kernel RELOCATABLE, is there a config option ?
> if yes, please let me know and I will give it a try to see if the
> problem persists or not. If not, then I am afraid there could be some
> bug.

Ok, I guess 2.6.18 did not have relocatable image option then. So you must
have compiled two kernels. First for address 0x100000 (1MB) and second capture
kernel for address 0x2000000(32MB)?

Is older version of kexec-tools loading this 2.6.18 based capture kernel
properly?

> 
> Thanks
> Soumendu
> 
> -----Original Message-----
> From: Vivek Goyal [mailto:vgoyal@redhat.com] 
> Sent: Tuesday, February 23, 2010 4:51 PM
> To: Soumendu Satapathy
> Cc: Kexec Mailing List
> Subject: Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping
> memorysegments at" error
> 
> On Tue, Feb 23, 2010 at 04:32:59PM -0500, Soumendu Satapathy wrote:
> > Hi Vivek,
> > 
> >  
> > 
> > Is it a bug? Its works for 2.6.27 but fails for 2.6.18 kernel. However
> I
> > use the vmlinuz image as a capture kernel in case of 2.6.27 as it does
> > not complain of relocatable kernel with it.
> > 
> >  
> > 
> > I am using a vmlinux kernel image to load as it complains  vmlinuz
> image
> > for not being relocatable in case of 2.6.18.
> > 
> >  
> > 
> > I get the following error:-
> > 
> >  
> > 
> > Overlapping memory segments at  0x27f7000
> > 
> > "sort_segments failed"
> > 
> 
> Can you post the output of "readelf -l vmlinux" just curious if vmlinux
> is reporting somehow overlappig memory segments. But you seem to be
> suggesting that that same vmlinux works with older version of
> kexec-tools?
> If yes, then it sounds like we introduced some bug in newer version of
> kexec-tools.
> 
> What is your environemnt? I mean what is your production kernel. Are you
> running 2.6.18 as production kernel and trying out loading 2.6.27 and
> 2.6.18  as capture kernel, or you have 2.6.27 as production kernel and
> trying out 2.6.27 and 2.6.18 as capture kernel. Not that it matters much
> at this point of time, just curious.
> 
> So I would begin with trying to load 2.6.18 vmlinux with older version
> of kexec-tools.
> 
> Is this 2.6.18 vmlinux relocatable?
> 
> Thanks
> Vivek
> 
> >  
> > 
> >  
> > 
> > Thanks
> > 
> > Soumendu
> > 
> >  
> > 
> > From: Soumendu Satapathy 
> > Sent: Tuesday, February 23, 2010 11:10 AM
> > To: Kexec Mailing List
> > Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
> > at" error
> > 
> >  
> > 
> > This is my .config  for the capture kernel.
> > 
> >  
> > 
> > CONFIG_KEXEC=y
> > 
> > CONFIG_CRASH_DUMP=y
> > 
> > CONFIG_PHYSICAL_START=0x2000000
> > 
> >  
> > 
> > I use crashkernel=64M@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@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@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@reldata.com
> > 
> > www.reldata.com <http://www.reldata.com/> 
> > 
> >  
> > 

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments at" error
  2010-02-23 22:31   ` Soumendu Satapathy
@ 2010-02-23 22:37     ` Vivek Goyal
  0 siblings, 0 replies; 6+ messages in thread
From: Vivek Goyal @ 2010-02-23 22:37 UTC (permalink / raw)
  To: Soumendu Satapathy; +Cc: Kexec Mailing List

On Tue, Feb 23, 2010 at 05:31:58PM -0500, Soumendu Satapathy wrote:
> Well the Entry point in the readelf shows 0x2000100.  But the physical
> start address that I specified in the .config file for the capture
> kernel is CONFIG_PHYSICAL_START=0x2000000.
> 
> I am just wondering, could it be an issue ?
> 

No, that's not the issue here.

Vivek


> Thanks
> Soumendu
> 
> 
> -----Original Message-----
> From: Soumendu Satapathy 
> Sent: Tuesday, February 23, 2010 5:17 PM
> To: 'Vivek Goyal'
> Cc: Kexec Mailing List
> Subject: RE: FW: 2.6.18 Fedora core kernel gives: "Overlapping
> memorysegments at" error
> 
> $ readelf -l vmlinux
> 
> Elf file type is EXEC (Executable file)
> Entry point 0x2000100
> There are 4 program headers, starting at offset 64
> 
> Program Headers:
>   Type           Offset             VirtAddr           PhysAddr
>                  FileSiz            MemSiz              Flags  Align
>   LOAD           0x0000000000200000 0xffffffff82000000
> 0x0000000002000000
>                  0x0000000000658608 0x0000000000658608  R E    200000
>   LOAD           0x0000000000859000 0xffffffff82659000
> 0x0000000002659000
>                  0x0000000000111085 0x000000000019d6b0  RWE    200000
>   LOAD           0x0000000000a00000 0xffffffffff600000
> 0x000000000272d000
>                  0x0000000000000c08 0x0000000000000c08  RWE    200000
>   NOTE           0x0000000000000000 0x0000000000000000
> 0x0000000000000000
>                  0x0000000000000000 0x0000000000000000  R      8
> 
>  Section to Segment mapping:
>   Segment Sections...
>    00     .text __ex_table .rodata .pci_fixup __ksymtab __ksymtab_gpl
> __ksymtab_gpl_future __kcrctab __kcrctab_gpl __kcrctab_gpl_future
> __ksymtab_strings __param .eh_frame
>    01     .data .data.cacheline_aligned .data.read_mostly
> .data.init_task .data.page_aligned .init.text .init.data .init.setup
> .initcall.init .con_initcall.init .security_initcall.init
> .altinstructions .altinstr_replacement .exit.text .init.ramfs .bss
>    02     .vsyscall_0 .xtime_lock .vxtime .wall_jiffies .sys_tz
> .sysctl_vsyscall .xtime .jiffies .vsyscall_1 .vsyscall_2 .vsyscall_3
>    03
> 
> 
> 
> 
> I did two tests one with 2.6.27 x86_64 Fedora core and the other with
> 2.6.18 x86_64 Fedora core. I use kexec-tools-2.0.1 for all the tests.
> 
> With 2.6.27, I use the vmlinuz image as the first kernel. I make a
> relocatable kernel by setting the required config options for the
> capture kernel.
> I use the same 2.6.27 kernel for both the first and the capture kernel.
> In 2.6.27, the use vmlinuz image which I have made relocatable as a
> capture kernel and I load it. It works fine. 
> 
> 
> With 2,6,18, I use the vmlinuz image as the first kernel. I use the same
> 2.6.18 as the capture kernel. I don't find an option or config option
> here to 
> make the capture kernel as RELOCATABLE as I find a default config option
> in 2.6.27 i.e CONFIG_RELOCATABLE=y. When I load the vmlinuz in this case
> it complains of not being RELOCATABLE. So in 2.6.18, I use the vmlinux
> image as the capture kernel and loads it. 
> 
> While loading the 2.6.18 vmlinux image ( the capture kernel ), it throws
> the following error:-
>  Overlapping memory segments at  0x27f7000
> 
>  "sort_segments failed"
> 
> 
> I think if I could have used the vmlinuz image as the capture kernel in
> case of 2.6.18, probably it will work. But since I am not able to make
> that relocatable I had to use the vmlinux imgae as the capture kernel in
> case of 2.6.18. 
> 
> How can I make the 2.6.18 kernel RELOCATABLE, is there a config option ?
> if yes, please let me know and I will give it a try to see if the
> problem persists or not. If not, then I am afraid there could be some
> bug.
> 
> Thanks
> Soumendu
> 
> -----Original Message-----
> From: Vivek Goyal [mailto:vgoyal@redhat.com] 
> Sent: Tuesday, February 23, 2010 4:51 PM
> To: Soumendu Satapathy
> Cc: Kexec Mailing List
> Subject: Re: FW: 2.6.18 Fedora core kernel gives: "Overlapping
> memorysegments at" error
> 
> On Tue, Feb 23, 2010 at 04:32:59PM -0500, Soumendu Satapathy wrote:
> > Hi Vivek,
> > 
> >  
> > 
> > Is it a bug? Its works for 2.6.27 but fails for 2.6.18 kernel. However
> I
> > use the vmlinuz image as a capture kernel in case of 2.6.27 as it does
> > not complain of relocatable kernel with it.
> > 
> >  
> > 
> > I am using a vmlinux kernel image to load as it complains  vmlinuz
> image
> > for not being relocatable in case of 2.6.18.
> > 
> >  
> > 
> > I get the following error:-
> > 
> >  
> > 
> > Overlapping memory segments at  0x27f7000
> > 
> > "sort_segments failed"
> > 
> 
> Can you post the output of "readelf -l vmlinux" just curious if vmlinux
> is reporting somehow overlappig memory segments. But you seem to be
> suggesting that that same vmlinux works with older version of
> kexec-tools?
> If yes, then it sounds like we introduced some bug in newer version of
> kexec-tools.
> 
> What is your environemnt? I mean what is your production kernel. Are you
> running 2.6.18 as production kernel and trying out loading 2.6.27 and
> 2.6.18  as capture kernel, or you have 2.6.27 as production kernel and
> trying out 2.6.27 and 2.6.18 as capture kernel. Not that it matters much
> at this point of time, just curious.
> 
> So I would begin with trying to load 2.6.18 vmlinux with older version
> of kexec-tools.
> 
> Is this 2.6.18 vmlinux relocatable?
> 
> Thanks
> Vivek
> 
> >  
> > 
> >  
> > 
> > Thanks
> > 
> > Soumendu
> > 
> >  
> > 
> > From: Soumendu Satapathy 
> > Sent: Tuesday, February 23, 2010 11:10 AM
> > To: Kexec Mailing List
> > Subject: 2.6.18 Fedora core kernel gives: "Overlapping memory segments
> > at" error
> > 
> >  
> > 
> > This is my .config  for the capture kernel.
> > 
> >  
> > 
> > CONFIG_KEXEC=y
> > 
> > CONFIG_CRASH_DUMP=y
> > 
> > CONFIG_PHYSICAL_START=0x2000000
> > 
> >  
> > 
> > I use crashkernel=64M@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@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@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@reldata.com
> > 
> > www.reldata.com <http://www.reldata.com/> 
> > 
> >  
> > 

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-02-23 22:37 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-02-23 21:32 FW: 2.6.18 Fedora core kernel gives: "Overlapping memory segments at" error Soumendu Satapathy
2010-02-23 21:50 ` Vivek Goyal
2010-02-23 22:17   ` FW: 2.6.18 Fedora core kernel gives: "Overlapping memorysegments " Soumendu Satapathy
2010-02-23 22:36     ` Vivek Goyal
2010-02-23 22:31   ` Soumendu Satapathy
2010-02-23 22:37     ` Vivek Goyal

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