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Allow memory reclamation through deletion

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When going to zram, things were solid for space reduction as
data was written, however memory could no longer be reclaimed.

It turns out that zram supports TRIM, and by telling xfs discard,
we have it do trim-on-demand. It is by default off out of performance
concerns, but I don't think that applies to a zram backed filesystem.
This commit is contained in:
Jarrod Johnson 2021-06-15 09:36:44 -04:00
parent 2ecab0432c
commit 490827fe3a
1 changed files with 1 additions and 1 deletions
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confluent_osdeploy/el8-diskless/profiles/default/scripts/imageboot.sh
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@ -14,7 +14,7 @@ memtot=$(grep ^MemTotal: /proc/meminfo|awk '{print $2}')
memtot=$((memtot/2))$(grep ^MemTotal: /proc/meminfo | awk '{print $3'})
echo $memtot > /sys/block/zram0/disksize
mkfs.xfs /dev/zram0 > /dev/null
mount /dev/zram0 /mnt/overlay
mount -o discard /dev/zram0 /mnt/overlay
mkdir -p /mnt/overlay/upper /mnt/overlay/work
mount -t overlay -o upperdir=/mnt/overlay/upper,workdir=/mnt/overlay/work,lowerdir=/mnt/remote disklessroot /sysroot
mkdir -p /sysroot/etc/ssh