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NOCOW & swap-in-ram fix.

This commit is contained in:
alex 2021-10-27 00:24:42 +03:00
parent c5816896b2
commit f7aa459015
1 changed files with 10 additions and 4 deletions
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14
0-preinstall.sh
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@ -129,10 +129,16 @@ echo "-- Check for low memory systems <8G --"
echo "--------------------------------------"
TOTALMEM=$(cat /proc/meminfo | grep -i 'memtotal' | grep -o '[[:digit:]]*')
if [[ $TOTALMEM -lt 8000000 ]]; then
dd if=/dev/zero of=/swapfile bs=1M count=2048 status=progress
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
#Put swap into the actual system, not into RAM disk, otherwise there is no point in it, it'll cache RAM into RAM. So, /mnt/ everything.
mkdir /mnt/opt/swap #make a dir that we can apply NOCOW to to make it btrfs-friendly.
chattr +C /mnt/opt/swap #apply NOCOW, btrfs needs that.
dd if=/dev/zero of=/mnt/opt/swap/swapfile bs=1M count=2048 status=progress
chmod 600 /mnt/opt/swap/swapfile #set permissions.
chown root /mnt/opt/swap/swapfile
mkswap /mnt/opt/swap/swapfile
swapon /mnt/opt/swap/swapfile
#The line below is written to /mnt/ but doesn't contain /mnt/, since it's just / for the sysytem itself.
echo "/opt/swap/swapfile none swap sw 0 0" >> /mnt/etc/fstab #Add swap to fstab, so it KEEPS working after installation.
fi
echo "--------------------------------------"
echo "-- SYSTEM READY FOR 0-setup --"