tmpfiles.d: Add thp-shrinker config to reduce memory usage (#108)

Signed-off-by: Peter Jung <[email protected]>

usr/lib/tmpfiles.d/thp-shrinker.conf

@@ -0,0 +1,6 @@
+# THP Shrinker has been added in the 6.12 Kernel
+# Default Value is 511
+# THP=always policy vastly overprovisions THPs in sparsely accessed memory areas, resulting in excessive memory pressure and premature OOM killing
+# 409 means that any THP that has more than 409 out of 512 (80%) zero filled filled pages will be split.
+# This reduces the memory usage, when THP=always used and the memory usage goes down to around the same usage as when madivise is used, while still providing equal performance improvement
+w! /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none - - - - 409