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toiday's leftovers

  • Linux Weekly Roundup #158

    Welcome to this week's Linux Roundup. It was a full week of Linux releases with Endless OS 4.0.0 and Deepin 20.3. We hope that you had a good week and may the be a great one ahead!

  • Putting the Open back into Open Source

    Agility has never been more important than it is in today’s disrupted digital world. Leaders in every industry are trying to find a balance between the stability that allows them to plan for the future, while creating highly agile organisations that can quickly respond to new challenges and opportunities. This agility only comes from the ability to innovate at speed, which is why open source communities are as vital as ever. According to SUSE’s recently commissioned Insight Avenue report, Why Today’s IT Leaders are Choosing Open, 84% now see open source as a way to cost-effectively drive this innovation.

  • How To Install Snap on Ubuntu 20.04 LTS - idroot

    In this tutorial, we will show you how to install Snap on Ubuntu 20.04 LTS. For those of you who didn’t know, Snap also known as Snappy is an alternative package management tool and program package format developed by Canonical, the company behind Ubuntu Linux. All the snaps are usually stored in a central repository called Snap Store from where snaps can be downloaded and installed using the snap command. Snaps work across a range of Linux distributions, which makes them a distro-agnostic upstream software deployment solution. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the Snap Package Manager on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian-based distribution like Linux Mint.

  • The European Commission To Force Apple To Allow App Sideloading (NASDAQ:AAPL) | Seeking Alpha [Ed: It is NOT called SIDELOADING… it’s called INSTALLING!]

    Investors are ignoring significant regulatory developments for Apple while distracted by Apple Car speculation.

  • Unboxing Busybox: Claroty and JFrog uncovers 14 vulnerabilities

    Embedded devices with limited memory and storage resources are likely to leverage a tool such as BusyBox, which is marketed as the Swiss Army Knife of embedded Linux. BusyBox is a software suite of Unix utilities, known as applets, that are packaged as a single executable file. Within BusyBox you can find a full-fledged shell, a DHCP client/server, and small utilities such as cp, ls, grep, and others. You’re also likely to find many OT and IoT devices running BusyBox, including popular programmable logic controllers (PLCs), human-machine interfaces (HMIs), and remote terminal units (RTUs)—many of which now run on Linux. As part of our commitment to improving open-source software security, Claroty’s Team82 and JFrog collaborated on a vulnerability research project examining BusyBox. Using static and dynamic techniques, Claroty’s Team82 and JFrog discovered 14 vulnerabilities affecting the latest version of BusyBox. In most cases, the expected impact of these issues is denial of service (DoS). However, in rarer cases, these issues can also lead to information leaks and possibly remote code execution.

  • Perl Weekly Challenge 140: Multiplication Tables
  • Leaky Rakudo

    Yesterday the discord-bridge-bot refused to perform its 2nd job: EVAL All The Things! The EVALing is done via shell-out and requires a fair bit of RAM (Rakudo is equally slim then Santa). After about 3 weeks the fairly simple bot had grown from about halve a GB to one and a halve – while mostly waiting for the intertubes to deliver small pieces of text. I complained on IRC and was advised to take heap snapshots. Since I didn’t know how to make heaps of snapshots, I had to take timo’s directions towards use Telemetry. As snap(:heap) wasn’t willing to surrender the filename of the snapshot (I want to compress the file, it is going to get big over time) I had a look at the source. I also requested a change to Rakudo so I don’t have to hunt down the filename, which was fulfilled by lizmat 22 minutes later. Since you may not have a very recent Rakudo, the following snipped might be useful.

  • Nemiver debugger now in devx SFS

    Mike (mikewalsh) responded with a great link that lists lots of Linux debugger/trace tools. The EasyOS devx SFS already has the 'gdb' CLI utility, and I saw on that link, there are 'ddd' and 'nemiver' GUI frontends for gdb. I went for nemiver and compiled it. The project seems to be almost dead, but then, if it works, perhaps no need for more commits to the git repository. I chose version 0.8.2, not the latest, but it suited me to stay with a gtk+2 based app rather than gtk+3. Two dependencies, 'gtkmm' and 'libgtop', are compiled in OpenEmbedded. I compiled 'libgtksourceviewmm' and 'nemiver' in a running EasyOS and made them into PETs.

Kernel and Graphics: Linux Stuff and GPUs

  • Facebook/Meta Tackling Transparent Page Placement For Tiered-Memory Linux Systems - Phoronix

    Back during the Linux 5.15 cycle Intel contributed an improvement for tiered memory systems where less used memory pages could be demoted to slower tiers of memory storage. But once demoted that kernel infrastructure didn't have a means of promoting those demoted pages back to the faster memory tiers should they become hot again, though now Facebook/Meta engineers have been working on such functionality.  Prior to the Linux 5.15 kernel, during the memory reclaim process when the system RAM was under memory pressure was to simply toss out cold pages. However, with Linux 5.15 came the ability to shift those cold pages to any slower memory tiers. In particular, modern and forthcoming servers with Optane DC persistent memory or CXL-enabled memory, etc. Therefore the pages are still accessible if needed but not occupying precious system DRAM if they aren't being used and to avoid just flushing them out or swapping to disk. 

  • Linux 5.17 To Boast Latency Optimization For AF_UNIX Sockets - Phoronix

    Net-next has been queuing a number of enticing performance optimizations ahead of the Linux 5.17 merge window kicking off around the start of the new year. Covered already was a big TCP optimization and a big improvement for csum_partial() that is used in the network code for checksum computation. The latest optimization is improving the AF_UNIX code path for those using AF_UNIX sockets for local inter-process communication.  A new patch series was queued up on Friday in net-next for improving the AF_UNIX code. That patch series by Kuniyuki Iwashima of Amazon Japan is ultimately about replacing AF_UNIX sockets' single big lock with per-hash locks. The series replaces the AF_UNIX big lock and also as part of the series has a speed-up to the autobind behavior. 

  • Nvidia Pascal GPU, DX12 and VKD3D: Slideshow time! - Boiling Steam

    So Horizon Zero Dawn had a sale recently on Fanatical, and I thought… OK I’ll grab it! It’s time. I first installed it on my workstation that only has a GTX1060 3GB GPU – not a workhorse but a decent card nonetheless for low-to-medium end gaming. I knew very well that Horizon Zero Dawn is a DX12 game and that Pascal architecture (Nvidia 10xx basically) and earlier versions do not play very well with DX12 games running through vkd3d-proton, the DX12 to Vulkan translation layer. Still, I could imagine getting somewhere around 30 FPS on low-to-medium settings, and use FSR if necessary to get to better framerates. Nothing prepared me for the performance I was about to experience.

Linux 5.16-rc3

So rc3 is usually a bit larger than rc2 just because people had some
time to start finding things.

So too this time, although it's not like this is a particularly big
rc3. Possibly partly due to the past week having been Thanksgiving
week here in the US. But the size is well within the normal range, so
if that's a factor, it's not been a big one.

The diff for rc3 is mostly drivers, although part of that is just
because of the removal of a left-over MIPS Netlogic driver which makes
the stats look a bit wonky, and is over a third of the whole diff just
in itself.

If you ignore that part, the statistics look a bit more normal, but
drivers still dominate (network drivers, sound and gpu are the big
ones, but there is noise all over). Other than that there's once again
a fair amount of selftest (mostly networking), along with core
networking, some arch updates - the bulk of it from a single arm64
uaccess patch, although that's mostly because it's all pretty small -
and random other changes.

Full shortlog below.

Please test,

             Linus
Read more Also: Linux 5.16-rc3 Released With Alder Lake ITMT Fix, Other Driver Fixes - Phoronix

Audiocasts/Shows: Endless OS 4.0.0, GIMP, BSD, KDE, and Elementary