Huh? What's a "Hygon Dhyana" [1]?

It is noted to be a variant of the AMD EPYC, and is so similar that "there is little to no differentiation between the chips". It has been noted that there is "less than 200 lines of new kernel code" for Linux kernel support, and that the Dhyana is "mostly a re-branded Zen CPU for the Chinese server market".

[1] https://en.wikipedia.org/wiki/Epyc#Chinese_variants

It's not just a re-brand as in "AMD is now making whitelabel CPUs". AMD gave the IP away for the short-sighted amount of $300 million, so now the Chinese can build their own Zen-class CPUs and create new variations of it.

And people wonder "how the Chinese have caught up so quickly?!". The western companies mostly gave away their entire IP for peanuts or some empty promises of "gaining access to the huge Chinese market", which never materialized because China made sure the local companies would always win. This, in combination with China's own theft of IP, is how they did it.

The linked page hardly says anything.

The actual change log: https://wiki.qemu.org/ChangeLog/4.1

I hope io_uring support will make it into 4.2.

Did memfd already made it? I wouldn't hold my breath.

As someone who uses QEMU as a cornerstone in my daily development work, I’m stoked to see the project pushing forward and putting out new releases. Right on :)

Where do you work?