mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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4cdfe91ca9
Update READMEs to refer to fuse3 instead of fuse. Also, update minimum versions and FUSE upstream's homepage Closes: https://github.com/ibm-s390-linux/s390-tools/pull/117 Signed-off-by: Graham Inggs <ginggs@debian.org> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
142 lines
2.3 KiB
Markdown
142 lines
2.3 KiB
Markdown
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# Setup
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## Configure crashkernel
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```shell
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sudo vim /etc/default/grub
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sudo sed -e 's/GRUB_CMDLINE_LINUX_DEFAULT="\(.*\)"/GRUB_CMDLINE_LINUX_DEFAULT="\1 crashkernel=512M"/' \
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-i /etc/default/grub
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sudo grub2-mkconfig -o /boot/grub2/grub.cfg
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sudo reboot
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```
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## Production kernel's root file system
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- kdump mounts the production kernel's root file system under **/kdump/mnt1**.
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## Dependencies
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```shell
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sudo zypper install -y fuse3 fuse3-devel systemd-devel
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```
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## Build hsavmcore
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```shell
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make -C s390-tools/hsavmcore
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```
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## Install hsavmcore
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```shell
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sudo cp s390-tools/hsavmcore/hsavmcore /usr/sbin/
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```
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## Create swap file
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```shell
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sudo dd if=/dev/zero of=/var/crash/swap.img bs=1M count=1024
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sudo mkswap /var/crash/swap.img
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```
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## Install hsavmcore.conf
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### Test configuration
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- Doesn't require HSA support
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#### HSA cache in file
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```shell
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cat <<EOF | sudo tee /etc/hsavmcore.conf
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verbose = 2
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workdir = /kdump/mnt1/var/crash
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use_hsa_mem = 0
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mount_debugfs = 1
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hsa_size = 0x1ffff000
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release_hsa = 0
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bind_mount_vmcore = 1
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EOF
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```
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#### HSA cache in memory
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```shell
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cat <<EOF | sudo tee /etc/hsavmcore.conf
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verbose = 2
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workdir = /kdump/mnt1/var/crash
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use_hsa_mem = 1
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mount_debugfs = 1
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hsa_size = 0x1ffff000
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release_hsa = 0
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bind_mount_vmcore = 1
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swap = /kdump/mnt1/var/crash/swap.img
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EOF
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```
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### Production configuration
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- Works only on s390x
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#### HSA cache in file
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```shell
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cat <<EOF | sudo tee /etc/hsavmcore.conf
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verbose = 2
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workdir = /kdump/mnt1/var/crash
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use_hsa_mem = 0
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mount_debugfs = 1
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hsa_size = -1
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release_hsa = 1
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bind_mount_vmcore = 1
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EOF
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```
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#### HSA cache in memory
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```shell
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cat <<EOF | sudo tee /etc/hsavmcore.conf
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verbose = 2
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workdir = /kdump/mnt1/var/crash
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use_hsa_mem = 1
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mount_debugfs = 1
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hsa_size = -1
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release_hsa = 1
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bind_mount_vmcore = 1
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swap = /kdump/mnt1/var/crash/swap.img
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EOF
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```
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## Install new dracut module
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```shell
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sudo cp -r s390-tools/hsavmcore/initramfs/sles/dracut/modules.d/99hsavmcore /usr/lib/dracut/modules.d/
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```
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## Add the new dracut module as a dependency to the dracut module *kdump*
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```shell
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sudo sed -e 's/_modules\[drm\]=/_modules[drm]=\n _modules[hsavmcore]=/' \
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-i /usr/lib/dracut/modules.d/99kdump/module-setup.sh
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```
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## Rebuild kdump initramfs
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```shell
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sudo mkdumprd -f
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```
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## Reload kdump
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```shell
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systemctl enable kdump
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systemctl restart kdump
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```
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# Test
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```shell
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echo c | sudo tee /proc/sysrq-trigger
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```
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