A Linux Evening

• linux

  981 170,551 10.0 C

  Linux kernel source tree

• syncthing-android

  1,233 3,037 9.2 Java

  Wrapper of syncthing for Android.

  

The main one I have is Syncthing[0]. I have a fairly involved file sync setup across several Android and Linux devices and it works beautifully; I like that I can use the space available on my devices instead of having to depend on/pay money for cloud (I know that it is not much for most of us). However, to best of my knowledge, Syncthing doesn't run on iPhone (it is possible that jailbreaking etc can make that work but that is a whole different area).

[0]: https://syncthing.net/

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• litepcie

  2 436 8.5 Python

  Small footprint and configurable PCIe core

Hi folks. :)

I'm so glad that my hit-and-run post has been so useful. After seeing Fabien's blog post I did a quick search and it turns out that the solution has spread fairly broadly to other forums. My choice of 0x33 was arbitrary so makes a nice canary for seeing it spread out.

My use case was (and remains) having a Xilinx Artix 7 FPGA in an external Thunderbolt 3 enclosure for testing the development of DSP accelerators using open source tooling. I didn't want to have the FPGA board inside the PC to be able to swap it to my laptop easily, because it produces a lot of heat, and so when I misused the PCIe soft core (litePCIe: https://github.com/enjoy-digital/litepcie/) it doesn't take down the OS. Being able to reload the FPGA and effectively hotplug the device has been very helpful.

Since I knew my issue was around hotplugging I searched for information around PCIe hotplugging and I think (it was two years ago...) that I found the answer from one of these two threads. Both mention the option of reserving PCIe addresses for hotplug busses as a workaround, and a workaround was all I needed.

https://www.spinics.net/lists/linux-pci/msg64841.html

https://review.coreboot.org/c/coreboot/+/35946

dmesg and the various kernel logs are my first stop for any odd behavior on Linux. Especially with any state change to a device (plugging in, turning on, removing, reconfiguring etc) the kernel logs tend to give invaluable info.

I had already been looking at eGPU forums to choose the Thunderbolt 3 enclosure (ended up with the ORI-SCM2T3-G40-GY) and there were various discussions of hotplugging issues there, but I don't think I found the specific kernel options to fix it there.

Check out this docs page for the kernel parameters:

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