FW: 2.6.18 Fedora core kernel gives: "Overlapping memory segments at" error
Vivek Goyal
vgoyal at redhat.com
Tue Feb 23 16:50:32 EST 2010
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 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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