Description of problem: diskdump kernel module is not displaying its parameters when using modinfo: block_order, sample_rate, dump_level, compress Version-Release number of selected component (if applicable): kernel 2.6.9-42.EL How reproducible: every time Steps to Reproduce: modinfo -p diskdump Actual results: displays nothing Expected results: displays the above module parameters and their purpose
Created attachment 149471 [details] linux-2.6.9-diskdump-parmdesc.patch This patch fixes the problem. With the patch, "modinfo diskdump" shows the following: # modinfo diskdump filename: /lib/modules/2.6.9-49.ELfj1smp/kernel/drivers/block/diskdump.ko license: GPL parm: compress:Specify whether compression for dump data is enabled or not. The default value is 0, which means that memory pages will be dumped without compression. If the value is 1, memory pages will be compressed using the deflation algorithm, GZIP. parm: dump_level:A memory collection level that specifies which memory pages will be dumped. Default value of 0 dumps all pages of physical RAM into the vmcore file. To avoid excessively large vmcore files, page cache pages, zero-filled pages, free pages, and user application pages may be eliminated from the file. Please refer README in diskdumputils package for more detail of each value parm: sample_rate:Determine how many blocks in the dump partition are verified before actual memory dumping begins. Default value is 8, which means one of every "1<<8" (256) blocks are verified. Specifying zero means all blocks in the partition are verified, and a minus value disables verification. parm: block_order:Specifies the dump-time I/O block size. Default value is 2, which sets the I/O block size equal to "page-size << 2", or 16 kbytes on an i386 machine. Larger values may make for better performance, but occupies more module memory. depends: vermagic: 2.6.9-49.ELfj1smp SMP gcc-3.4
User ntachino's account has been closed
please give the patch in comment#1, linux-2.6.9-diskdump-parmdesc.patch a try, and let us know if it works for you or not.
Unfortunately I do not have a system set up to try out this patch. I have looked at the patch as well as the usage (modinfo diskdump) and both look OK. If you want more definite confirmation, please generate a test RPM package, and I will test that instead.
This is very old bz and I think as of now nobody needs this, so I close this bz. Please reopen if anyone need this.