Hi Jay, Jay Lan wrote: >> I found an ia64 discontigmem kernel problem that the 'pgdat_list.node_mem_map' >> has an unexpected value, and I created the attached patch for avoiding the >> problem. If applying this patch, makedumpfile takes mem_map's information >> from a symbol 'vmem_map' instead of 'pgdat_list.node_mem_map'. >> It is for makedumpfile-1.2.8. Could you please test it ? >> >> Note: >> This solution needs a symbol 'vmem_map', but vmcoreinfo data in /proc/vmcore >> does not contain it. So "-x" option is necessary for running makedumpfile >> like the following. >> >> # makedumpfile -c -d31 -x vmlinux /proc/vmcore dumpfile > > Hi Ken'ichi, > > Thanks for your patch! > > I am wondering if the discontigmem kernel has a legitimate bug, > we probably should report it? Yes, we should. I'm investigating this problem more to report it. > I tested your patch on a machine that used to fail in executing > 'makedumpfile'. It now generated a dump file fine. > > Running 4.0.7.1 crash against the dump file looked good! Thank you for your testing. It is a good news to me, and I will merge the patch into the next makedumpfile. > I will test on other types machines later. Thanks too. Thanks Ken'ichi Ohmichi
