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Kernel: LKML, Torvalds, Linux 5.3, AMD's Ryzen 3000, Automotive Grade Linux and Conferences

Submitted by Roy Schestowitz on Tuesday 9th of July 2019 05:18:36 AM Filed under
Linux
  • Ryabitsev: Patches carved into developer sigchains

    Konstantin Ryabitsev has posted a lengthy blog entry describing his vision for moving away from email for kernel development.

  • Patches carved into developer sigchains

    The “decent” tool is fiction, but the SSB framework I'm describing is not. SSB stands for “Secure Scuttlebutt” (it's nautical slang for “gossip,” so please stop guffawing). SSB is a distributed gossip protocol that is built on the concept of replicating individual “sigchains,” which are very similar in concept to git. Each record references the hash of the previous record, plus SSB uses an ECC key to cryptographically sign every new entry, such that the entire chain is fully verifiable and attestable. Unless someone has access to the ECC secret key created at the beginning of the SSB chain, they would not be able to add new entries — and unless the chain has never been replicated anywhere, all entries are immutable (or the replication simply breaks if any of the existing records in it are modified).

    The sigchains are only part of the story — SSB also offers a decentralized replication protocol that works hard to make sure that there is no single point of trust and no single point of failure. It is able to replicate using “pub” servers that merely work as convenient mediators, but are unnecessary for the overall health of the SSB fabric. SSB replication can be done peer-to-peer via local network, over the Internet, via Tor, sneakernet, or anything at all that is able to send and receive bits.

    The end-tool on the client uses these individual feeds to assemble a narrative, using message-id cross-references to construct threads of conversations. SSB is envisioned as a fully-private and fully-decentralized social network where each participating individual shares an immutable activity record choosing how much to share publicly, how much to share with specific individuals, and how much to keep fully private.

    I suggest we co-opt SSB for free software development to make it truly decentralized, self-archiving, and fully attestable in all developer interactions.

  • Why Linux Is Developed In Public: Linus Torvalds

    When we asked if Torvalds would prefer a private mailing list where the community can discuss things candidly without worrying about bloggers sensationalizing things, he said no.

  • Linux 5.3 Adds Support For Intel Multi-Die CPU Topology

    Intel's patches for supporting the multi-die topology of Cascadelake-AP processors is now going into the Linux 5.3 kernel.

    These patches have been sitting on the mailing list the past number of months for dealing with the multi-chip package of Cascadelake "Advanced Performance" processors where their dies are connected via UPI links.

  • x86 CPU Changes For Linux 5.3 Bring Intel UMWAIT, Zhaoxin, Engineering Train Wreck

    Thomas Gleixner sent in his various x86 code updates early this morning for the just kicked off Linux 5.3 kernel cycle.

    Some of the notable x86 CPU changes for Linux 5.3 include:

    - Official x86 Zhaoxin CPU support for these Chinese desktop CPU processors based on VIA Centaur IP. There were some kernel patches last year for Zhaoxin while with this next kernel release the support appears in order.

  • The Ryzen 3000 Boot Problem With Newer Linux Distros Might Be Due To RdRand Issue

    As outlined yesterday, AMD's Ryzen 3000 processors are very fast but having issues booting newer Linux distributions. The exact issue causing that boot issue on 2019 Linux distribution releases doesn't appear to be firmly resolved yet but some are believing it is an RdRand instruction issue on these newer processors manifested by systemd.

    For those that missed my launch day article, check it out for more details and then all the benchmarks for when running very performant on the likes of Ubuntu 18.04 LTS where the issue does not occur. What people are jumping on today are the old reports of AMD RdRand problems for using this hardware RNG instruction causing issues on older pre-Zen2 processors. It is possible though the RdRand support regressed even further and thus in worse shape with Zen 2, but I haven't seen that officially acknowledged by AMD nor if it firmly addresses the issue.

  • Automotive Grade Linux reveals new members

    Automotive Grade Linux (AGL) says Wuhan Bluestar Technology has joined as a Silver member, while Candera, IDW Technologies, Reutlingen University and T-Systems have joined in the Bronze category.

    AGL is a collaborative cross-industry effort developing an open source platform for connected car technologies,

    "We are excited to expand our growing, global community with five new members," said AGL executive director at the Linux Foundation, Dan Cauchy.

    "We look forward to working with them as we continue to expand the AGL platform including instrument cluster, telematics and vehicle-to-cloud connectivity."

    AGL is an open source project at the Linux Foundation bringing together automakers, suppliers and technology companies to accelerate the development and adoption of a fully open, shared software platform for all technology in the vehicle, from infotainment to autonomous driving.

  • CFP and Registration Open For Linux Piter Conference

    The conference gathers many key Linux people from all around the world. In the past we had Lennart Pottering (Red Hat), Christoph Hellwig, Stephen Hemminger (Microsoft), Monty Widenius (MariaDB Corporation AB), Bero Rosenkränzer (OpenMandriva), Rafael J. Wysocki (Intel) and many others joining the event.

  • Linux Plumbers Conference: VFIO/IOMMU/PCI Microconference Accepted into 2019 Linux Plumbers Conference

    We are pleased to announce that the VFIO/IOMMU/PCI Microconference has been accepted into the 2019 Linux Plumbers Conference!

    The PCI interconnect specification and the devices implementing it are incorporating more and more features aimed at high performance systems. This requires the kernel to coordinate the PCI devices, the IOMMUs they are connected to and the VFIO layer used to manage them (for user space access and device pass-through) so that users (and virtual machines) can use them effectively. The kernel interfaces to control PCI devices have to be designed in-sync for all three subsystems, which implies that there are lots of intersections in the design of kernel control paths for VFIO/IOMMU/PCI requiring kernel code design discussions involving the three subsystems at once.

  • Linux Plumbers Conference: Update on LPC 2019 registration waiting list

    Here is an update regarding the registration situation for LPC2019.

    The considerable interest for participation this year meant that the conference sold out earlier than ever before.

    Instead of a small release of late-registration spots, the LPC planning committee has decided to run a waiting list, which will be used as the exclusive method for additional registrations. The planning committee will reach out to individuals on the waiting list and inviting them to register at the regular rate of $550, as spots become available.

»

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