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@Y" parameter to the kernel Starting kdump: [FAILED] 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
