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Joined 1 year ago
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Cake day: August 2nd, 2023

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  • An alternative definition: a real-time system is a system where the correctness of the computation depends on a deadline. For example, if I have a drone checking “with my current location + velocity will I crash into the wall in 5 seconds?”, the answer will be worthless if the system responds 10 seconds later.

    A real-time kernel is an operating system that makes it easier to build such systems. The main difference is that they offer lower latency than a usual OS for your one critical program. The OS will try to give that program as much priority as it wants (to the detriment of everything else) and immediately handle all signals ASAP (instead of coalescing/combining them to reduce overhead)

    Linux has real-time priority scheduling as an optional feature. Lowering latency does not always result in reduced overhead or higher throughout. This allows system builders to design RT systems (such as audio processing systems, robots, drones, etc) to utilize these features without annoying the hell out of everyone else.



  • Pretty sure expiry is handled by the local crowdsec daemon, so it should automatically revoke rules once a set time is reached.

    At least that’s the case with the iptables and nginx bouncers (4 hour ban for probing). I would assume that it’s the same for the cloudflare one.

    Alternatively, maybe look into running two bouncers (1 local, 1 CF)? The CF one filters out most bot traffic, and if some still get through then you block them locally?


  • I’ve recently moved from fail2ban to crowdsec. It’s nice and modular and seems to fit your use case: set up a http 404/rate-limit filter and a cloudflare bouncer to ban the IP address at the cloudflare level (instead of IPtables). Though I’m not sure if the cloudflare tunnel would complicate things.

    Another good thing about it is it has a crowd sourced IP reputation list. Too many blocks from other users = preemptive ban.


  • According to this post, the person involved exposed a different name at one point.

    https://boehs.org/node/everything-i-know-about-the-xz-backdoor

    Cheong is not a Pingyin name. It uses Romanization instead. Assuming that this isn’t a false trail (unlikely, why would you expose a fake name once instead of using it all the time?) that cuts out China (Mainland) and Singapore which use the Pingyin system. Or somebody has a time machine and grabbed this guy before 1956.

    Likely sources of the name would be a country/Chinese administrative zone that uses Chinese and Romanization. Which gives us Taiwan, Macau, or Hong Kong, all of which are in GMT+8. Note that two of these are technically under PRC control.

    Realistically I feel this is just a rogue attacker instead of a nation state. The probability of China 1. Hiring someone from these specific regions 2. Exposing a non-pinying full name once on purpose is extremely low. Why bother with this when you have plenty of graduates from Tsinghua in Beijing? Especially after so many people desperate for jobs after COVID.



  • Been playing it since release and I have to say I quite like it. The mtx is less intrusive than Dragon Age Origins’ DLC (no mention in game at all versus “There’s a person bleeding out on the road, if you want to help him please go to the store page”).

    So far, the game is a buttery smooth 60 fps at 4k max graphics + FSR3 w/o ray tracing except for inside the capital city (running 7800x3d with a 7900xtx). The only graphics complaint I have is the FSR implementation is pretty bad, with small amounts of ghosting under certain lighting conditions. There’s also a noticeable amount of input lag compared to the first game: not game breaking, but if you do a side-by-side comparison it’s pretty obvious.

    Sure the game has its issues, but right now this looks like something that I enjoy. Games don’t need to be masterworks to be fun (my favorite games are some old niche JRPGs that have been absolutely demolished by reviewers at the time), and right now I think it’s money well spent.





  • StarDreamer@lemmy.blahaj.zonetoLinux@lemmy.mlHelp w/ crash
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    10 months ago

    Look at the line with the asm_exc_invalid_op. That seems like a hardware fault caused by an invalid asm instruction to me. Either something wrong is being interpreted as an opcode (unlikely) or maybe the driver was compiled with extensions not available on the current machine.

    OP, how old is your CPU? And how old is the nic you are using?

    Edit: did you use a custom driver for the NIC? I’m looking at the Linux src and rt_mutex_schedule does not exist. Nevermind. Was checking 4.18 instead of 6.7. found it now. The bug is most likely inside a macro called preempt_disable(). Unfortunately most of the functions are pretty heavily inlined and architecture dependent so you won’t get much out of it. But it is likely any changes you made in terms of premption might also be causing the bug.






  • Why can’t y’all just make normal children’s food like chicken curry with rice? Stop putting so much sugar and corn syrup in everything.

    If this continues we’ll have to retaliate: see how certain East Asian countries make pizzas and burgers and see how you like it! (PS: it was flatbread with corn and ham as the only toppings)

    Oh and the original answer: since so many people have already answered soy sauce, I’d say chicken soup or pork broth.