Problems writing ELF dumps with makedumpfile 1.2.9

[Worth, Kevin]

Hi Ken'ichi,

My config file is attached. Kernel is 2.6.20 + Ubuntu patches. It was built from http://packages.ubuntu.com/feisty/linux-source-2.6.20

Since it might be easy to see the parts I have changed from the defaults, the diff between my config and the Ubuntu "generic" config is below.

-Kevin


diff /boot/config-2.6.20-17-generic /boot/config-2.6.20-17.37-custom2
3,4c3,4
< # Linux kernel version: 2.6.20-17-generic
< # Wed Aug 20 14:43:36 2008
---
> # Linux kernel version: 2.6.20-17.37-custom2
> # Tue Aug 19 18:50:53 2008
33c33
< CONFIG_VERSION_SIGNATURE="Ubuntu 2.6.20-17.39-generic"
---
> CONFIG_VERSION_SIGNATURE="Ubuntu 2.6.20-17.37-generic"
51c51
< # CONFIG_EMBEDDED is not set
---
> CONFIG_EMBEDDED=y
188,190c188,194
< CONFIG_HIGHMEM4G=y
< # CONFIG_HIGHMEM64G is not set
< CONFIG_PAGE_OFFSET=0xC0000000
---
> # CONFIG_HIGHMEM4G is not set
> CONFIG_HIGHMEM64G=y
> # CONFIG_VMSPLIT_3G is not set
> # CONFIG_VMSPLIT_3G_OPT is not set
> # CONFIG_VMSPLIT_2G is not set
> CONFIG_VMSPLIT_1G=y
> CONFIG_PAGE_OFFSET=0x40000000
191a196
> CONFIG_X86_PAE=y
204c209
< # CONFIG_RESOURCES_64BIT is not set
---
> CONFIG_RESOURCES_64BIT=y
1161a1167
> CONFIG_IDE_MAX_HWIFS=4
1443a1450
> # CONFIG_PATA_PLATFORM is not set
1525a1533
> CONFIG_I2O_EXT_ADAPTEC_DMA64=y




-----Original Message-----
From: Ken'ichi Ohmichi [mailto:oomichi at mxs.nes.nec.co.jp]
Sent: Sunday, September 21, 2008 10:21 PM
To: Worth, Kevin
Cc: Masaki Tachibana; kexec-ml
Subject: Re: Problems writing ELF dumps with makedumpfile 1.2.9


Hi Kevin,

Thank you for reporting.

I guess that the problem depends on kernel configuration, and I want
to reproduce it on my machine for investigating. Could you send me
your kernel .config file ? And please let me know the kernel version.


Thanks
Ken'ichi Ohmichi

Worth, Kevin wrote:
> Hello,
>
> I have a couple errors that also happened on 1.2.6 and I wondered if anyone might have a suggestion why.
>
> The one thing I know might be strange about my system is that my first kernel (the one that panics) is compiled with CONFIG_VMSPLIT_1G, meaning that it is set to have 3GB of kernel space and 1GB of user space. I believe this does things to CONFIG_PAGE_OFFSET, but the depth of my kernel knowledge is not so great.
>
>
> # makedumpfile -E -d 31 -i /boot/vmcoreinfo vmcore dumpoutput2
> check_release: /boot/vmcoreinfo and vmcore don't match.
>
> makedumpfile Failed.
>
> The release numbers of the vmcore and vmcoreinfo files should be identical. This happens if I specify anything greater than "-d 1".
>
> I tried a quick addition to the printf to include the values that generate the above error. It looks like "system_utsname.release" is NULL coming into the strcmp on line 340 of makedumpfile.c . Unfortunately I don't know enough about the kernel to go further than this.
>
>
> Additionally (potentially a separate issue), on an identical piece of hardware, but with 4GB of memory instead of 2GB, using "-d 1", I get the following error:
>
> Excluding zero pages               : [ 38 %] readmem: Can't seek the dump memory(/proc/vmcore). Invalid argument
> create_2nd_bitmap: Can't exclude pages filled with zerocreate_2nd_bitmap: for creating an ELF dumpfile.
>
> makedumpfile Failed.
>
> I can cp the file just fine and it loads up in crash, but I can't seem to use makedumpfile to trim the vmcore down at all on this system with more memory.
>
> Any suggestions? Thanks!
>
>
> Kevin Worth
> Network Security
> Software Engineer
> kevin.worth at hp.com<mailto:kevin.worth at hp.com>
> ph 916.785.4528
> fx 916.785.1196
>
> [cid:image003.jpg at 01C91999.C5AF4AE0]

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