Hi Hari, On Thu, Feb 22, 2024 at 11:30:17AM +0530, Hari Bathini wrote: > Hi Sachin, > > On 22/02/24 10:55 am, Sachin Sant wrote: > > Kdump fails to save vmcore with recent linux-next builds on IBM Power server > > with following messages > > > > Starting Kdump Vmcore Save Service... > > [ 17.349599] kdump[367]: Kdump is using the default log level(3). > > [ 17.407407] kdump[391]: saving to > > /sysroot//var/crash//127.0.0.1-2024-02-21-15:03:55/ > > [ 17.441270] EXT4-fs (sda2): re-mounted > > 630dfb4e-74bd-45c4-a8de-232992bc8724 r/w. Quota mode: none. > > [ 17.444404] kdump[395]: saving vmcore-dmesg.txt to > > /sysroot//var/crash//127.0.0.1-2024-02-21-15:03:55/ > > [ 17.464859] kdump[401]: saving vmcore-dmesg.txt complete > > [ 17.466636] kdump[403]: saving vmcore > > [ 17.551589] kdump.sh[404]: > > Checking for memory holes : [ 0.0 %] / > > Checking for memory holes : [100.0 %] | readpage_elf: Attempt to read > > non-existent page at 0xc000000000000. > > [ 17.551718] kdump.sh[404]: readmem: type_addr: 0, addr:c00c000000000000, > > size:16384 > > [ 17.551793] kdump.sh[404]: __exclude_unnecessary_pages: Can't read the > > buffer of struct page. > > [ 17.551864] kdump.sh[404]: create_2nd_bitmap: Can't exclude unnecessary > > pages. > > [ 17.562632] kdump.sh[404]: The kernel version is not supported. > > [ 17.562708] kdump.sh[404]: The makedumpfile operation may be incomplete. > > [ 17.562773] kdump.sh[404]: makedumpfile Failed. > > [ 17.564335] kdump[406]: saving vmcore failed, _exitcode:1 > > [ 17.566013] kdump[408]: saving the /run/initramfs/kexec-dmesg.log to > > /sysroot//var/crash//127.0.0.1-2024-02-21-15:03:55/ > > [ 17.583658] kdump[414]: saving vmcore failed > > > > Git bisect points to following patch > > > > commit 378eb24a0658dd922b29524e0ce35c6c43f56cba > > mm/vmalloc: remove vmap_area_list > > > > Reverting this patch allows kdump to save vmcore file correctly. > > > > Does this change require any corresponding changes to makedumpfile? > > Right. The change intends the tools to use VMALLOC_START exported via > vmcoreinfo instead of vmap_area_list. I don't see the corresponding > makedumpfile change submitted upstream yet though. > > Aditya, can you help with this..
Sure hari, I will into it. Thanks for the explanation, that will help. Thanks, Aditya Gupta > > - Hari
