Red Hat Bugzilla – Bug 605717
disable memory cgroups on kdump
Last modified: 2010-11-10 16:00:18 EST
Description of problem:
the memory cgroup controller eats a significant portion of memory in the kernel, which is fine for nominal exection in most cases but can lead to oom conditions in kdump, we need to add cgroup_disable=memory to the kdump kernel command line.
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
Verified with -133.el6:
[root@athlon5 ~]# cat /etc/sysconfig/kdump
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
# If no version is specified, then the init script will try to find a
# kdump kernel with the same version number as the running kernel.
# The kdump commandline is the command line that needs to be passed off to
# the kdump kernel. This will likely match the contents of the grub kernel
# line. For example:
# KDUMP_COMMANDLINE="ro root=LABEL=/"
# If a command line is not specified, the default will be taken from
# This variable lets us append arguments to the current kdump commandline
# As taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 reset_devices cgroup_disable=memory"
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.