hvenev

3 か月前議論

(2023) judging by https://skysedge.com/telecom/RUSP/electrical.html

4 か月前議論

This blog post calls libgit2 "git's C library" as if it is in any way related to git. I don't think it is.

5 か月前議論

> In the meanwhile in raspberry pi land, you can just go to download a reasonably new OS image from their website anytime you want and it will run on all their models.

Are you saying that even with the Raspberry Pi we are still at the mercy of the hardware manufacturer when it comes to OS images?

hvenev

5 か月前議論

I personally call this process of setting up a new device, whether for me or for someone else, "shit shoveling". It is something of a ritual.

In the former case the thing that needs to be removed is the entirety of the OS (and if that proves to be impossible, the device is returned or discarded), and in the latter it's a scan of all apps and removal of all unnecessary apps, my grandma does not need Samsung Galaxy Games, thank you very much.

hvenev

6 か月前議論

Will you not have `~/.ssh`? If you have `.ssh .config/ssh` as a rewrite rule, `stat ~/.ssh` will still find it.

hvenev

7 か月前議論

For IPv4 the graph does not start at zero, but at around 45K.

hvenev

7 か月前議論

> Jeff once simultaneously reduced all binary sizes by 3% and raised the severity of a previously known low-priority Python bug to critical-priority in a single change that contained no Python code.

This sounds really plausible. A change to the C toolchain/library (for example, specialized/inlined memcpy) may affect binary sizes significantly, and may change the behavior of something the C standard leaves undefined (for example, memcpy with overlapping arguments).

hvenev

8 か月前議論

Don't they already sell servers? https://www.nvidia.com/en-us/data-center/dgx-platform/

hvenev

9 か月前議論

Back when my job involved using Kubernetes and Helm, the solution I found was to use `| toJson` instead: it generates one line that happens to be valid YAML as well.

hvenev

9 か月前議論

From what I remember, the quality of a safe is measured in minutes, with "15-minute" safes being OK for general use.

hvenev

11 か月前議論

English also changes, so the only way to be safe is to quote all identifiers.

hvenev

11 か月前議論

What I personally do is

    User=per-service-user
    ExecStart=!podman-wrapper ...

where podman-wrapper passes `--user=1000:1000 --userns=auto:uidmapping=1000:$SERVICE_UID:1,gidmapping=1000:$SERVICE_GID:1` (where the UID/GID are set based on the $USER environment variable). Each container runs as 1000:1000 inside the container, which is mapped to the correct user on the host.

hvenev

11 か月前議論

Our GCP VMs are also not responding (europe-west4-a and us-central1-b).

edit: Seems to be a network problem. We can't connect to them from Bulgaria, but we can connect to them from the US.

hvenev

11 か月前議論

I wonder when quantum computers will be able to target post-quantum RSA [1]. Normal RSA operations (key generation, encryption, decryption) have an asymptotic advantage over Shor's algorithm, so it is not unreasonable to just use large enough keys. The advantage is similar to Merkle's puzzles [2], with the added bonus that the attacker also needs to run their attack on a quantum computer.

A while ago I generated a gigabit RSA public key. It is available at [3]. From what I remember, the format is: 4-byte little-endian key size in bytes, then little-endian key, then little-endian inverse of key mod 256**bytes. The public exponent is 3.

[1] https://eprint.iacr.org/2017/351.pdf

[2] https://dl.acm.org/doi/pdf/10.1145/359460.359473

[3] https://hristo.venev.name/pqrsa.pub

hvenev

昨年議論

I'm struggling to understand how this has anything to do with borrow checking. Borrow checking is a way to reason about aliasing, which doesn't seem to be a concern here.

This post is about memory management and doesn't seem to be concerned much about safety in any way. In C3, does anything prevent me from doing this:

  fn int* example(int input)
  {
      @pool()
      {
          int* temp_variable = mem::tnew(int);
          *temp_variable = input;
          return temp_variable;
      };
  }

hvenev

昨年議論

In `libnvidia-nvvm.so` the string `cutlass` appears right after `Memory Dependence Analysis` and `memdep`. Perhaps it acts as an optimization attribute of some sort, where the compiler is allowed to make assumptions about the kernel's behavior that are not valid in general?

hvenev

昨年議論

> can be implemented in terms of `openat` + `fgetxattr`

Except for symlinks. `fgetxattr` requires a file opened for read or write, but symlinks can only be opened as `O_PATH`.

hvenev

昨年議論

Sadly the inclination of the orbit prevents it from falling that far north.

hvenev

昨年議論

I think git is quite nice and easy to work with once you realize one thing: git is first and foremost a filesystem. Version control is built on top.

hvenev

昨年議論

For local communication Microsoft Visual Studio Code often uses TCP sockets (bound to localhost) even though UNIX sockets are available. What's more, old versions used to pass the authentication token as a command-line argument, exposing it to all users on the system.

I wonder how many other security disasters it contains that nobody has discovered yet.

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