What other notable improvements are there?

marcodiego · on May 28, 2022

But MGLRU alone is impactful enough to finally fix a multi-decade desktop limitation, so I don't even care about other changes.

cpeterso · on May 28, 2022

For people who don’t know what MGLRU (Multi-Generation Least Recently Used) page cache algorithm is:

https://www.phoronix.com/scan.php?page=news_item&px=MGLRU-v1...

> There are wins reported for Cassandra, Hadooop, MySQL/MariaDB, Memcached, MongoDB, PostgreSQL, Redis, and improving the behavior in general for systems with limited RAM capacities or a lot of memory intense activities.

> MGLRU is already shipping with Google Android devices and also patched into Google's Chrome OS kernel.

magicalhippo · on May 29, 2022

That page didn't really explain MGLRU, at least to me. These pages however helped a lot:

https://lwn.net/Articles/856931/

https://lwn.net/Articles/894859/

An aspect I found interesting was that, in addition to the LRU aspect, it includes a PID controller to try to learn or compensate for its mistakes.

infinet · on May 29, 2022

It is very exciting. Sounds like other filesystems under Linux now get zfs Adaptive Replacement Cache for free.

ksec · on May 29, 2022

Will they bump the version number to 6?

5e92cb50239222b · on May 29, 2022

Why would they? Linus changes version numbers on a whim, he stated that multiple times. Partly to make it obvious that all kernel releases are equal, partly for no reason at all.