1# SPDX-License-Identifier: LGPL-2.1-or-later
2#
3# The systemd-pstore.service(1) archives the contents of /sys/fs/pstore
4# upon boot so that there is room for a subsequent dump. This service
5# is enabled with:
6#  systemctl enable systemd-pstore
7#
8# With the service enabled, the kernel still needs to be configured
9# to write data into the pstore. The kernel has two parameters,
10# crash_kexec_post_notifiers and printk.always_kmsg_dump, that
11# control writes into pstore.
12#
13# The crash_kexec_post_notifiers parameter enables the kernel to write
14# dmesg (including stack trace) into pstore upon a panic even if kdump
15# is loaded, only needed if you want to use pstore with kdump. Without
16# this parameter, kdump could block writing to pstore for stability
17# reason. Note this increases the risk of kdump failure even if pstore
18# is not available.
19#
20# The printk.always_kmsg_dump parameter enables the kernel to write dmesg
21# upon a normal shutdown (shutdown, reboot, halt).
22#
23# To configure the kernel parameters, uncomment the appropriate
24# line(s) below. The value written is either 'Y' to enable the
25# kernel parameter, or 'N' to disable the kernel parameter.
26#
27# After making a change to this file, do:
28#  systemd-tmpfiles --create path/to/tmpfiles.d/systemd-pstore.conf
29#
30# These changes are automatically applied on future re-boots.
31
32d /var/lib/systemd/pstore 0755 root root 14d
33#w- /sys/module/printk/parameters/always_kmsg_dump - - - - Y
34#w- /sys/module/kernel/parameters/crash_kexec_post_notifiers - - - - Y
35