This reverts commit 5633e8331866098c97e72e99f233a254fa479a4d. vm.zone_reclaim_mode may cause trashing on some machines. And after second thought, vm.zone_reclaim_mode is barely helpful for machines with high mem stress, so just revert it. --- dracut-module-setup.sh | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh index 066d0ce..b32b39b 100755 --- a/dracut-module-setup.sh +++ b/dracut-module-setup.sh @@ -645,18 +645,16 @@ kdump_install_conf() { rm -f ${initdir}/tmp/$$-kdump.conf } -# Remove user custom configurations sysctl.conf & sysctl.d/* -# and apply some optimization for kdump -overwrite_sysctl_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" - - mkdir -p "${initdir}/etc/sysctl.d" - echo "vm.zone_reclaim_mode = 3" > "${initdir}/etc/sysctl.d/99-zone-reclaim.conf" } kdump_iscsi_get_rec_val() { @@ -947,7 +945,7 @@ kdump_install_systemd_conf() { install() { kdump_module_init kdump_install_conf - overwrite_sysctl_conf + remove_sysctl_conf if is_ssh_dump_target; then kdump_install_random_seed -- 2.30.2