New package: runit-kdump-20150226

srcpkgs/runit-kdump/INSTALL.msg

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+To enable loading the crash kernel, append crashkernel=128M to the
+Linux command line.
+
+By default, crash dumping will use the default initrd and dump in
+runit stage 1 to /var/crash.
+
+You can place a custom initrd used for crash dumping as
+/boot/initramfs-${KERNELVERSION}kdump.img.

srcpkgs/runit-kdump/files/90-kdump.sh

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+if [ -e /proc/vmcore ] && ! grep -q nokdump /proc/cmdline ; then
+	DIR="/var/crash/$(date +%Y%m%d-%H%M%S)"
+	msg "Found kernel crash dump, saving vmcore to $DIR...\n"
+	mkdir -p "$DIR"
+	makedumpfile -l --message-level 1 -d 31 /proc/vmcore "$DIR"/vmcore.incomplete &&
+		mv "$DIR"/vmcore.incomplete "$DIR"/vmcore
+	msg "Found kernel crash dump, saving dmesg to $DIR...\n"
+	vmcore-dmesg /proc/vmcore >"$DIR"/vmcore-dmesg.txt.incomplete &&
+		mv "$DIR"/vmcore-dmesg.txt.incomplete "$DIR"/vmcore-dmesg.txt
+	sync
+	touch /run/runit/reboot
+	msg "Crash dump done, triggering reboot.\n"
+	exit 100  # force reboot
+fi
+
+if [ $(cat /sys/kernel/kexec_crash_size) = 0 ]; then
+	msg_warn "Loading crash kernel skipped, booted without crashkernel=NNN.\n"
+else
+	KVER="$(uname -r)"
+	if [ -f /boot/initramfs-${KVER}kdump.img ]; then
+		INITRD=/boot/initramfs-${KVER}kdump.img
+	else
+		INITRD=/boot/initramfs-${KVER}.img
+	fi
+
+	APPEND="irqpoll nr_cpus=1 maxcpus=1 reset_devices udev.children-max=2 panic=10 cgroup_disable=memory mce=off numa=off"
+
+	msg "Loading crash kernel..."
+	kexec --load-panic /boot/vmlinuz-${KVER} \
+		--initrd="$INITRD" --reuse-cmdline --append="$APPEND" &&
+		msg_ok
+fi

srcpkgs/runit-kdump/template

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+# Template file for 'runit-kdump'
+pkgname=runit-kdump
+version=20150226
+revision=1
+noarch=yes
+make_dirs="/var/crash 0755 root root"
+depends="runit-void makedumpfile kexec-tools"
+short_desc="Crashkernel/kdump support for runit to save vmcore to disk"
+maintainer="Christian Neukirchen <chneukirchen@gmail.com>"
+license="Public Domain"
+homepage="http://www.voidlinux.eu/"
+
+do_install() {
+	vinstall ${FILESDIR}/90-kdump.sh 0644 etc/runit/core-services
+}