Hi, 2007/08/22 21:08:38 +0900, Ken'ichi Ohmichi <oomichi at mxs.nes.nec.co.jp> wrote: > >Hi Andrew, > >This patch set frees the restriction that makedumpfile users should >install a vmlinux file (including the debugging information) into >each system. > >makedumpfile command is the dump filtering feature for kdump. >It creates a small dumpfile by filtering unnecessary pages for the >analysis. To distinguish unnecessary pages, it needs a vmlinux file >including the debugging information. These days, the debugging package >becomes a huge file, and it is hard to install it into each system. > >To solve the problem, kdump developers discussed it at lkml and kexec-ml. >As the result, we reached the conclusion that necessary information >for dump filtering (called "vmcoreinfo") should be embedded into the >first kernel file and it should be accessed through /proc/vmcore >during the second kernel. >(http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.0/1806.html) > >Dan Aloni created the patch set for the above implementation. >(http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.1/1053.html) > >And I updated it for multi architectures and memory models. >(http://lists.infradead.org/pipermail/kexec/2007-August/000479.html) > > >PATCH SET: >[1/3] [linux] Add vmcoreinfo > The patch is for linux-2.6.22. > The patch adds the vmcoreinfo data. Its address and size are output > to /sys/kernel/vmcoreinfo. The patch for linux (add-vmcoreinfo.patch) is included in 2.6.23-rc4-mm1. http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc4/2.6.23-rc4-mm1/announce.txt Thank you for your cooperation. >[2/3] [kexec-tools] Pass vmcoreinfo's address and size > The patch is for kexec-tools-testing-20070330. > (http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/) > kexec command gets the address and size of the vmcoreinfo data from > /sys/kernel/vmcoreinfo, and passes them to the second kernel through > ELF header of /proc/vmcore. When the second kernel is booting, the > kernel gets them from the ELF header and creates vmcoreinfo's PT_NOTE > segment into /proc/vmcore. Horms, could you please merge the above patch ? >[3/3] [makedumpfile] Extract vmcoreinfo from /proc/vmcore > The patch is for makedumpfile v1.1.6. > (https://sourceforge.net/projects/makedumpfile/) > makedumpfile command extracts the vmcoreinfo data from /proc/vmcore > and uses it for dump filtering. I will release the next makedumpfile with the above patch. Thanks Ken'ichi Ohmichi
