kdump failed to collect vmcore and complained OOM
(Doc ID 1499238.1)
Last updated on NOVEMBER 09, 2022
Applies to:
Linux OS - Version Oracle Linux 5.6 with Unbreakable Enterprise Kernel [2.6.32] and laterOracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Symptoms
Kdump process complained out of memory
Oct 8 09:44:38 localhost netconsole:: inserting netconsole module with arguments netconsole=6666@10.XX.XX.98/eth0,514@10.XX.XX.31/00:0C:29:YY:YY:YY ----> Starting netconsole
<snip>
Oct 8 09:44:38 localhost kernel: netconsole: remote IP xxxx
<snip>
Oct 8 09:44:48 localhost kernel: SysRq : Show Memory -----------> Then we tested the sysrq facility
<snip>
Oct 9 18:11:35 localhost gconfd (root-5195): Resolved address "xml:readwrite:/root/.gconf" to a writable configuration source at position 0 -----> Triggerred kdump
Oct 9 18:15:03 localhost syslogd 1.4.1: restart. --------> Starting kexec, and IMG_0129.JPG indicates it's collecting vmcore
Oct 9 18:15:03 localhost kernel: klogd 1.4.1, log source = /proc/kmsg started.
Oct 9 18:15:03 localhost kernel: Initializing cgroup subsys cpuset
Oct 9 18:15:03 localhost kernel: Initializing cgroup subsys cpu
Oct 9 18:15:03 localhost kernel: Linux version 2.6.32-300.4.1.el5uek (hostname@xxxx.example.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-50)) #1 SMP Fri Dec 23 03:13:22 EST 2011
Oct 9 18:15:03 localhost kernel: Command line: ro root=LABEL=/ rhgb quiet numa=off irqpoll maxcpus=1 reset_devices memmap=exactmap memmap=640K@0K memmap=130416K@49792K elfcorehdr=180208K memmap=88K$3395044K memmap=252K#3395132K memmap=12488K$3395384K memmap=262144K$3670016K memmap=32768K$4161536K --------> it's different from normal kernel
Oct 9 18:15:03 localhost kernel: KERNEL supported cpus:
<snip>
Oct 9 18:25:24 localhost kernel: Out of memory: kill process 3283 (S20kdump) score 1578 or a child ----------> kdump failed due to out of memory
Oct 9 18:25:24 localhost kernel: Killed process 3293 (cp)
Oct 9 18:25:24 localhost kernel: cp: page allocation failure. order:0, mode:0x2005a
Oct 9 18:25:24 localhost kernel: Pid: 3293, comm: cp Not tainted 2.6.32-300.4.1.el5uek #1
Oct 9 18:25:24 localhost kernel: Call Trace:
<snip>
Oct 9 18:49:23 localhost init: Switching to runlevel: 0 ----------> failed and shutdown
Oct 9 18:52:44 localhost syslogd 1.4.1: restart.
Oct 9 18:52:44 localhost kernel: klogd 1.4.1, log source = /proc/kmsg started.
Oct 9 18:52:44 localhost kernel: Initializing cgroup subsys cpuset
Oct 9 18:52:44 localhost kernel: Initializing cgroup subsys cpu
Oct 9 18:52:44 localhost kernel: Linux version 2.6.32-300.4.1.el5uek (xxxx@xxxx.example.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-50)) #1 SMP Fri Dec 23 03:13:22 EST 2011
Oct 9 18:52:44 localhost kernel: Command line: ro root=LABEL=/ rhgb quiet crashkernel=128M@48M numa=off ---------> normal kernel command line
~
Cause
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