On 08/25/16 at 05:45pm, Himanshu Madhani wrote: > > > On 8/25/16, 1:10 AM, "Michal Hocko" <mhocko at kernel.org> wrote: > > >[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? > > Attached is kernel log from fresh kernel compile of 4.6.5 (linux-stable) tree Where is the kernel log? Seems the kernel log in bugzilla is for crashkernel=128M Thanks Dave
