From 80238ade1851ebf0c37f1c3751766df8b3638583 Mon Sep 17 00:00:00 2001 From: Hari Bathini Date: Mon, 8 Dec 2014 17:29:08 +0530 Subject: [PATCH] kdump: remove sysctl.conf & sysctl.d/* files for kdump kernel Certain kernel parameters like min_free_kbytes can be configured at runtime using sysctl. While this is useful in first kernel, it can lead to unnecessary failures like OOM in kdump kernel. This patch enforces default vaules for all sysctl parameters, in kdump kernel, by removing sysctl.conf & sysctl.d/* files. Signed-off-by: Hari Bathini Acked-by: Dave Young Acked-by: Baoquan He Acked-by: WANG Chao --- dracut-module-setup.sh | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh index 4e004a9..d65c8c0 100755 --- a/dracut-module-setup.sh +++ b/dracut-module-setup.sh @@ -367,6 +367,18 @@ kdump_install_conf() { rm -f /tmp/$$-kdump.conf } +# Default sysctl parameters should suffice for kdump kernel. +# Remove custom configurations sysctl.conf & sysctl.d/* +remove_sysctl_conf() { + + # As custom configurations like vm.min_free_kbytes can lead + # to OOM issues in kdump kernel, avoid them + rm -f "${initdir}/etc/sysctl.conf" + rm -rf "${initdir}/etc/sysctl.d" + rm -rf "${initdir}/run/sysctl.d" + rm -rf "${initdir}/usr/lib/sysctl.d" +} + kdump_iscsi_get_rec_val() { local result @@ -575,6 +587,7 @@ kdump_install_random_seed() { install() { kdump_install_conf + remove_sysctl_conf if is_ssh_dump_target; then kdump_install_random_seed