[araes]

Thanks for the clarification and explanation. Missed the part about 1000 threads fighting over memory page files, and minimal allocation for scans.

The article would have been a bit clearer to read with something like your summary up near the front to provide at least a framework of what to look for further onward.

After re-reading, does sound like Linux 6.1 ended having a fix with this portion almost near the end:

  A significant change in memory management is the introduction of Multi-Gen LRU (MGLRU), a complete redesign of the LRU-based page reclaim mechanism. It was introduced in Linux kernel 6.1 and since then more and more distributions have enabled it by default. I decided to give it a try and enabled this feature. And it turned out to be the cure for COS 109!