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Add pstore-RAM support and fix comments indentation

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Check README.MD and /etc/default/kdump for instructions on
pstore usage - should be simple, it's automatically configured.

Notice that we expect all units to have the same e820 memory
map, hence to have the RAM buffer available. This point should
be better clarified by the team working with firmware.

Also, the package now enables the kdump systemd service
automatically, in a post-installer hook.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
This commit is contained in:
Guilherme G. Piccoli
2021-12-29 16:26:41 -03:00
parent 69dfe03e44
commit a1f89d341f
8 changed files with 131 additions and 43 deletions
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23
kdump.etc
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@ -9,18 +9,27 @@
# /usr/lib/kdump/kdump_load.sh initrd
#
# Mount-related options - the DEVNODE must exist and be available during the kdump
# script execution. The KDUMP_FOLDER will be create if doesn't exist.
# Mount-related options - the DEVNODE must exist and be available during the
# kdump script execution. The KDUMP_FOLDER will be create if doesn't exist.
# The KDUMP_MNT is just a temporary file that will carry the mounted folder
# path across boot-time scripts.
MOUNT_DEVNODE="nvme0n1p8"
KDUMP_FOLDER="/.steamos/offload/var/kdump"
KDUMP_MNT="/tmp/kdump.mnt"
# Dump controlling settings - for now we don't have network/iscsi dumps, only
# local storage dumps. If FULL_COREDUMP is !=0, we collect a full compressed
# vmcore, which might require a lot of disk space. The *_CMD settings refer
# to tunnings on makedumpfile - we rely on zstd compression and maximum page
# exclusion for the full vmcore, mimic'ing Debian kdump.
# Dump controlling settings - for now we don't have network/iscsi dumps, only
# local storage dumps. If FULL_COREDUMP is !=0, we collect a full compressed
# vmcore, which might require a lot of disk space. The *_CMD settings refer
# to tunnings on makedumpfile - we rely on zstd compression and maximum page
# exclusion for the full vmcore, mimic'ing Debian kdump.
FULL_COREDUMP=0
MAKEDUMPFILE_COREDUMP_CMD="-z -d 31"
MAKEDUMPFILE_DMESG_CMD="--dump-dmesg"
# Pstore-RAM setting - if enabled, Kdump won't be loaded, instead the Pstore
# RAM backend will be configured. In order to have success, this operation
# relies in having an available RAM buffer on /proc/iomem with at least 5MiB
# in size.
USE_PSTORE_RAM=1