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: / usr / share / kdump-tools /

Filename : kdump_mem_estimator

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#!/bin/sh
KDUMP_DIR="/var/lib/kdump"

if [ ! -x "$(command -v systemctl)" ]; then
	echo "Couldn't find systemctl" 1>&2
	exit 1
fi

# Notice that memory estimation would only be useful and represent the reality
# if a /proc/meminfo snapshot is collected early on boot, hence we have the
# check below - basically, we shouldn't collect the snapshot in case this
# is executed later by the users (manually or via restarting kdump-tools).
if ! systemctl is-active basic.target 1>/dev/null 2>&1; then
	# It's very likely this directory is already created, but if for some
	# reason it isn't, we will fail the memory estimator. So, create the
	# directory anyway - if it's already there, then this is a NOP.
	mkdir -p "${KDUMP_DIR}"
	cat /proc/meminfo 1> "${KDUMP_DIR}/mem-$(uname -r)"
fi