Messages in this thread | | | Date | Wed, 2 Aug 2023 15:57:49 +0530 | Subject | Re: [next-20230731] Kdump fails to capture vmcore (powerpc) | From | Hari Bathini <> |
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On 31/07/23 7:39 pm, Sachin Sant wrote: > Kernel Crash dump(kdump) and firmware assisted dump on powerpc > fails to capture vmcore on recent linux-next builds. > > Starting Kdump Vmcore Save Service... > systemd[1]: Starting Kdump Vmcore Save Service... > kdump[599]: Kdump is using the default log level(3). > kdump[635]: saving to /sysroot/var/crash/127.0.0.1-2023-07-31-09:01:28/ > kdump[639]: Remounting the dump target in rw mode. > kdump[643]: saving vmcore-dmesg.txt to /sysroot/var/crash/127.0.0.1-2023-07-31-09:01:28/ > kdump[649]: saving vmcore-dmesg.txt complete > kdump[651]: saving vmcore > kdump.sh[652]: readpage_elf: Attempt to read non-existent page at 0x4000000000000000. > kdump.sh[652]: readmem: type_addr: 0, addr:0, size:8 > kdump.sh[652]: get_vmemmap_list_info: Can't get vmemmap region addresses > kdump.sh[652]: get_machdep_info_ppc64: Can't get vmemmap list info. > kdump.sh[652]: makedumpfile Failed. > kdump[654]: saving vmcore failed, exitcode:1 > kdump[656]: saving the /run/initramfs/kexec-dmesg.log to /sysroot/var/crash/127.0.0.1-2023-07-31-09:01:28// > kdump[663]: saving vmcore failed > systemd[1]: kdump-capture.service: Main process exited, code=exited, status=1/FAILURE > systemd[1]: kdump-capture.service: Failed with result 'exit-code'. > systemd[1]: Failed to start Kdump Vmcore Save Service. > [FAILED] Failed to start Kdump Vmcore Save Service. > > Git bisect points to following patch: > > 8dc9a0ad0c3e7f43e4e091e4e24634e21ce17a54 is the first bad commit > commit 8dc9a0ad0c3e7f43e4e091e4e24634e21ce17a54 > powerpc/book3s64/vmemmap: switch radix to use a different vmemmap handling function >
Earlier, makedumpfile made use of vmemmap_list to populate all the vmemmap regions but that changed for radix. It uses the init_mm pgtable for vmemmap regions. A fix is needed in makedumpfile to catch up with the above change.
Thanks Hari
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