makedumpfile-1.1.6: linux-2.6.22 support

Hi,

makedumpfile version 1.1.6 is released. Please test it. Your opinions/comments are welcome.

Explanation of makedumpfile:
To shorten the size of the dumpfile and the time of creating the dumpfile, makedumpfile copies only the necessary pages for analysis to the dumpfile from /proc/vmcore. You can specify the kind of unnecessary pages with dump_level. If you want to shorten the size further, enable the compression of the page data.

Changelog:

Changelog:
o linux-2.6.22 support.
The method for getting the member offset of "page.mapping" is applied for linux-2.6.22.
Old makedumpfile assumed that there was "mapping" in the first union in structure "page". But on linux-2.6.22, there is "mapping" in the second union, because "_mapcount" and structure for slub are packed in the first union. Then, new makedumpfile gets the offset by searching "mapping" in each union.

o Change the check method of free_pages for linux-2.6.21 or later. On linux-2.6.21 or later, the number of free_pages (vm_stat[0]) is sometimes different from the one of the pages listed in "free_area" actually, because the former is flushed asynchronously. Then, new makedumpfile doesn't check these numbers, and confirms the free_pages only by checking whether the list "free_area" is not corrupted.

o Some cleanups
- Cleanup the description for '--message-level' by Akira Imamura.
- Cleanup the structures DumpInfo and vm_table.
- Cleanup the dwarf method.
- Cleanup page_to_pfn() method.

You can download the latest makedumpfile(ver. 1.1.6) from the following URL. Details of the change are written on the CVS page of the following site.
https://sourceforge.net/projects/makedumpfile/

Method of installation:
You can compile the makedumpfile command as follows;
1. "tar -zxvf makedumpfile-1.1.6.tar.gz"
2. "cd makedumpfile"
3. "make; make install"

Usage:
makedumpfile [-c] [-E] [-d dump_level] [-x vmlinux] dump_mem dump_file

Example:
If you want to exclude pages filled by zero, cache pages, user pages and free pages and to enable compression, please execute the following command.

  # makedumpfile -c -d 31 -x vmlinux /proc/vmcore dumpfile

Thanks
Ken'ichi Ohmichi

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Hi Ohmichi-san,

I'm sorry for my late reply.

Thank you for applying it. I verified the latest package.

Thanks,
Akira Imamura

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