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 root at dut4062:~# cat /proc/cmdline ro root=/dev/mapper/VolGroup-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=VolGroup/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=512M rd_LVM_LV=VolGroup/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb console=ttyS0 console=ttyS0,115200n8 root at dut4062:~# service kdump status Kdump is not operational root at dut4062:~# 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] root at dut4062:~# Messages in log fil Aug 25 10:42:16 dut4062 kdump: kexec: failed to load kdump kernel Aug 25 10:42:16 dut4062 kdump: failed to start up root at dut4062:~# kexec --ver kexec-tools 2.0.0 released 19th July 2008 root at dut4062:~# root at dut4062:~# crash --version crash 7.1.5++ Copyright (C) 2002-2016 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu". Let me know if any other details are needed. I have multiple servers which exhibit same issues. > >> 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: syslog Type: application/octet-stream Size: 104309 bytes Desc: syslog URL: <http://lists.infradead.org/pipermail/kexec/attachments/20160825/681ac3ee/attachment-0001.obj>
