Hi, On 02 Feb 2005 08:24:03 -0700 [EMAIL PROTECTED] (Eric W. Biederman) wrote: > > So the kernel+initrd that captures a crash dump will live and execute > in a reserved area of memory. It needs to know which memory regions > are valid, and it needs to know small things like the final register > state of each cpu.
Exactly. Please let me clarify what you are going to. 1) standard kernel: reserve a small contigous area for a dump kernel (this is not changed as the current code) 2) standard kernel: export the information of valid physical memory regions. (/proc/iomem or /proc/cpumem etc.) 3) kexec (system call?): store the information of valid physical memory regions as ELF program header to the reserved area (mentioned 1)). 4) standard kernel: when a panic occur, append (ex.) the register information as ELF note after the memory information (if necessary). and jump new kernel 5) dump kernel: export all valid physical memory (and saved register information) to the user. (as /dev/oldmem /proc/vmcore ?) Is this correct ? one question: how the dump kernel know the saved area of ELF headers ? one more question: I don't understand what the 640K backup area is. Please let me know why it is necessary. Thanks. -- Itsuro ODA <[EMAIL PROTECTED]> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
