On Thu, Oct 31, 2019 at 11:07:52AM +0100, Laszlo Ersek wrote: > +Leif, comment at bottom
Thanks Laszlo. +Dann, -kexec. > On 10/30/19 09:16, Prabhakar Kushwaha wrote: > >> So if you want to add these properties, you should add them there. > >> > >> Can you explain why doing this is necessary? > > > > I am trying to test kexec -p (kdump feature) on CentOS-release > > 7.7.1908 and Ubuntu-18.04 distributions. > > > > "kexec -p" command show error on Ubuntu. While no error on CentOS > > > > CentOS: > > $ kexec -p /boot/vmlinuz-`uname -r` --initrd=/boot/initramfs-`uname > > -r`.img --reuse-cmdline > > $ ==> No error > > > > Ubuntu > > $ kexec -p /boot/vmlinuz-`uname -r` --initrd=/boot/initrd.img-`uname > > -r` --reuse-cmdline > > $ kexec: elfcorehdr doesn't fit cells-size. > > $ kexec: setup_2nd_dtb failed. > > $ kexec: load failed. > > $ Cannot load /boot/vmlinuz-5.4.0-rc4+ > > > > Note: Both CentOS and Ubuntu has Linux-5.4-rc4 tag. > > > > When i debugged further reason for Ubuntu error is due to > > address-cells and size-cells as "1" > > log from kexec tool :- > > load_crashdump_segments: elfcorehdr 0x7f7cbfc000-0x7f7cbff7ff > > read_1st_dtb: found name =dtb_sys /sys/firmware/fdt > > get_cells_size: #address-cells:1 #size-cells:1 > > > > On CentOS both values are "2". > > log from kexec tool :- > > load_crashdump_segments: elfcorehdr 0xbf98bf0000-0xbf98bf33ff > > read_1st_dtb: found nmae=dtb_sys /sys/firmware/fdt > > get_cells_size: #address-cells:2 #size-cells:2 > > > > Note: Kexec tool read values from /sys/firmware/fdt. > > > > I am trying to figure out why 2 distributions showing different values. > > http://git.savannah.gnu.org/cgit/grub.git/commit/?id=347210a5d5ce655b95315f320faa515afb723c11 > > Ubuntu probably ships a grub version that lacks this commit. Yes, it came after the 18.04 release. Dann: given that 18.04 is LTS, would it be reasonable to cherry-pick this grub patch? I would consider the behaviour without it to be a bug. / Leif > (The commit was first released as part of upstream grub-2.04. I have no > idea what version of grub is shipped in the CentOS distro you mention > above -- it could be based upon upstream 2.04, or the upstream patch may > have been backported to CentOS.) > > Thanks > Laszlo > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#49762): https://edk2.groups.io/g/devel/message/49762 Mute This Topic: https://groups.io/mt/39480086/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
