On Tue, Sep 30, 2008 at 10:47 PM, Dave Anderson <anderson@xxxxxxxxxx> wrote: > Dave Anderson wrote: >> >> Jun Koi wrote: >> >>> On Tue, Sep 23, 2008 at 12:49 AM, Dave Anderson <anderson@xxxxxxxxxx> >>> wrote: >>> >>>> Jun Koi wrote: >>>> >>>>> Hi, >>>>> >>>>> I found below cmdline params having no documentation anywhere, so >>>>> could somebody explain their meaning? >>>>> >>>>> - memory_module >>>>> - no_modules >>>>> - no_ikconfig >>>>> - no_namelist_gzip >>>>> - no_kmem_cache >>>>> - kmem_cache_delay >>>>> - readnow >>>>> - buildinfo >>>>> - zero_excluded >>>>> >>>>> >>>>> Many thanks, >>>>> J >>>> >>>> >>>> They're all essentially debug flags for use on kernels/dumpfiles >>>> that for some reason or other would not initialize properly. >>>> >>>> memory_module: if /dev/mem or /dev/crash do not suffice you could >>>> force-feed one or the other for live system analysys. >>> >>> >>> >>> Another question: Why do we need the "memory_device" param if we >>> already had "memory_module"? Arent they the same thing? The naming >>> here is so confused to me. >> >> >> No. >> >> pc->memory_module is the truncated name of a loadable module, if >> one is necessary, consisting of the module object file name minus >> the ".o" or ".ko", whichever is applicable. /dev/mem does not >> require a pre-installed kernel module, whereas /dev/crash requires >> the crash.o or crash.ko misc driver to be installed. So if by >> chance you want to use your own hand-rolled memory device, it may >> or may not require that a kernel module be installed. If it does, >> then you would put "--memory_module your-memory-module.ko" on the >> command line. >> >> pc->memory_device is the name of a device file, i.e., "/dev/mem" >> or "/dev/crash". It is initialized to "/dev/crash" in hopes that >> it exists, and defaults to "/dev/mem" if it doesn't. But again, >> if you have your own memory device you'd like to use, you can override >> both of them by putting "--memory_module /dev/whatever" on the command > > Sorry, I meant "--memory_device /dev/whatever" above... > Great, it is clear to me now! I have another question: what is the purpose of the "-L" option? Thanks, Jun -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
