[Let's add kdump people] On Wed 24-08-16 16:38:56, Himanshu Madhani wrote: > Hello list, > > I am wondering if anybody has issue capturing crash dump with the 4.6.0 and above kenrel. > > I have a system, when booted in 4.5.7 kernel is able to capture crash dump. > However, when I boot this system in 4.6.4 and 4.7.2 kernel, crash dump is not > able to capture any crash. > > I am still facing same issue with 4.8.0-rc2+ kernel and from the error at the command prompt, > it seems like kexec is ignoring ?crashkenrel? parameter. > > I added below information in https://bugzilla.kernel.org/show_bug.cgi?id=119291. > > # uname -r > 4.8.0-rc2+ > > # cat /proc/cmdline > ro root=/dev/mapper/vg_dut4110-lv_root rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=512M rd_LVM_LV=vg_dut4110/lv_swap rd_LVM_LV=vg_dut4110/lv_root rd_NO_DM rhgb quiet > > # service kdump status > Kdump is not operational > > # service kdump start > Memory for crashkernel is not reserved > Please reserve memory by passing "crashkernel=X at Y" parameter to the kernel > Starting kdump: [FAILED] It smells like the crash kernel reservation has failed. Could you provide the full kernel log? > message file confirms that kexec was not able to start the service > > Aug 15 10:41:17 dut4110 kdump: kexec: failed to load kdump kernel > Aug 15 10:41:17 dut4110 kdump: failed to start up > > Note, that same option is able to load kdump service for 4.5.7 kernel. > > I can provide any details needed to help resolve this issue. > > Thanks, > - Himanshu > -- Michal Hocko SUSE Labs
