Wed, 12 Oct 2016 08:57:19 GMTWith a small commit, OpenBSD now has a hypervisor and virtualization in-tree. This has been a lot of hard work by Mike Larkin, Reyk Flöter, and many others. VMM requires certain hardware features (Intel Nehalem or later, and virtualization enabled in the BIOS) in order to provide VM services, and currently only supports OpenBSD guests.
This has been enabled in snapshots for a week, so your favourite mirror is already ready for you to upgrade. Of course, please report any bugs you run into. This work was partially sponsored by The OpenBSD Foundation, and if you like it, please donate or bid on the signed cd set.CVSROOT: /cvs Module name: src Changes by: firstname.lastname@example.org 2016/10/12 02:30:26 Modified files: sys/arch/amd64/conf: GENERIC Log message: enable vmm
Mon, 17 Oct 2016 20:08:55 GMTFive OpenBSD 6.0 CD-ROM copies were signed by 40 developers during the g2k16 Hackathon in Cambridge, UK. These copies are being auctioned sequentially on ebay.
All proceeds will be donated to the OpenBSD Foundation to support and further the development of free software based on the OpenBSD operating system. Read more...
Sat, 17 Sep 2016 12:18:36 GMT
Alexander Bluhm (bluhm@) contributed our next report (which even includes a picture):
Big plans what to do at a hackathon don't work. There is always something unexpected that requires your attention. So I was expecting the unexpected. The TCP send performance has dropped to a very low throughput in some environments. It was pretty clear that it was related with claudio@'s change to speed up TCP by using large mbufs instead of chaining small ones. Mbufs are used inside the kernel to hold network data. Using a lot of them requires many allocations and frees. This can be avoided by using larger mbufs. But why did it get slower? Together with mikeb@ we found out that it was related to the mbuf space limit in the socket buffer. One large mbuf filled the send buffer, so no new mbufs could be inserted until TCP received the acknowledgements for everything. So the sliding window algorithm with mbufs cycling through the socket buffer did not work anymore. After identifying the problem, the fix was easy, just increase the default socket buffer mbuf size limit.
Thu, 15 Sep 2016 21:09:24 GMTThe g2k16 hackathon must have been a really great one, because here is yet another report, this time from Patrick Wildt, who writes:
I knew that if I had any plans for the hackathon, they would have been thrown out of the window as soon as I arrived there. That was a good plan actually, since exactly that happened.Read more...