Hi.
This patchset fixes two problems.
[PATCH 1/3] Fix the page-flags
The first patch fixes the values of page-flags to solve the problem
that makedumpfile cannot distinguish the cache page correctly.
To distinguish the cache page, makedumpfile uses the values of PG_lru,
PG_swapcache, and PG_private. And there were the mistakes of these
values in the existing makedumpfile. This problem was reported by
Akiyama-san.
| PG_lru | PG_private | PG_swapcache
-----------------+--------+------------+--------------
old makedumpfile| 5 | 12 | 16
2.6.15 | 5 | 11 | 15
2.6.16.27 | 5 | 11 | 15
2.6.17 | 5 | 11 | 15
2.6.18 | 5 | 11 | 15
[PATCH 2/3] Fix the variable as pfn
The second patch fixes the variable as pfn at write_pages().
The existing makedumpfile aborts with "Floating point exception"
if you select ELF format as a dumpfile format(-E option).
it used dh->max_mapnr as pfn at write_pages(), but makedumpfile
does not set the value into dh->max_mapnr with ELF format, and
the value divides by 0.
The latest makedumpfile(ver. 1.0.4) is based on makedumpfile from
me(2006/11/06) with all my patches applied.
You can get the latest makedumpfile from the following URL.
https://sourceforge.net/projects/makedumpfile/
[PATCH 1/3] Fix the page-flags
[PATCH 2/3] Fix the variable as pfn
[PATCH 3/3] Update the version info of makedumpfile
Method of installation:
You can compile the makedumpfile command as follows;
1. "tar -zxvf makedumpfile-1.0.4.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
Todo:
- Dumping DISCONTIGMEM kernel
Thanks
Ken'ichi Ohmichi
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