gchristensen changed the topic of #nixos-chat to: NixOS but much less topical || https://logs.nix.samueldr.com/nixos-chat
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<eyJhb> The hell
<eyJhb> samueldr: sounds like we will see some kind of moneygrab from them
<andi-> anyone played with virtio-fs yet? Apparently that could speedup our VM test infra. Just came across this presentation: https://static.sched.com/hosted_files/kvmforum2019/ff/virtio-fs_%20A%20Shared%20File%20System%20for%20Virtual%20Machines.pdf
<eyJhb> Sorry no, but now I discovered Kata Containers :D
<eyJhb> Seems nice
<eyJhb> Whoo, it uses firecracker
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<andi-> I've been running a few state-/disk-less VMs using 9ps on NixOS and the main bottleneck was always the terrible performance during startup. Since those are mostly applications that do not do much I/O I never bothered investigating. Using virtio-fs sounds really promising. Once we have kernel 5.4 in nixpkgs I'll give it a try.
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<eyJhb> andi-: let us know how it goes! What things are you running in your VMs? Any reason not to do a container instead?
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<andi-> eyJhb: I don't want to give $randomPeople access to my kernel, I can load kernel module as needed (e.g. wireguard) without having them on the host.
<andi-> I also never want them to be able to use the hosts network even if our container scripts fail.
<eyJhb> Ahh okay, makes total sense andi- ! THen you might also be somewhat interested in kata-containers as well?
<andi-> think Tor gateway
<eyJhb> VM + Cont
<andi-> Not really interested in Kata... I have my custom module that starts VMs based on a NixOS configuration on the host and I am happy :-)
<eyJhb> Damn, hoped I could rope you into packaging it for NixOS ;)
<eyJhb> But if everything is up and running as-is, it makes total sense!
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<eyJhb> adisbladis: what was it that you did for a living?
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<adisbladis> eyJhb: I work at Tweag
<adisbladis> Why?
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<eyJhb> adisbladis: I jsut keep forgetting and I am waay too curious
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<clever> samueldr: the answer is yes, changing from slim to lightdm will terminate your session with zero warning
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<worldofpeace> hmm, clever I think that might be pam rule related.
<worldofpeace> IIRC, if you switch from GDM to lightdm or either way around it doesn't result in a crash.
<worldofpeace> then again, if autologin is topical here, I know for a fact there's a bug with accountsservice that also causes a crash. (but only on NixOS)
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<ajs124> remote: Failed to Update: [...] Branch: master Error: CommitRepoAction: NotifyWatchers: insert new actioner: Error 1366: Incorrect string value: '\xF0\x9F\x92\xAF\n...' for column `gitea`.`action`.`content` at row 1
<ajs124> TIL: gitea doesn't like emoji in commit messages. At least on our setup.
<eyJhb> I don't get the emoji thing at all
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<eyJhb> Just changed this ( https://www.youtube.com/watch?v=_ose2-u4a9U ) to assemble it and figure out another one died while I was changing the other one...
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<gchristensen> anyone know if I can put some graphviz nodes inside another node?
<gchristensen> like have a big "machine1" node and a "machine2" node, and then have some mini graphs inside machine1 and machine2
<gchristensen> lol yes, use a subgraph with a name beginning with "cluster_" ... cool.
<aminechikhaoui> random question: is fortran still a thing ? :D I was a bit surprised it's still used in some scientific computing such as openblas ? is it really better for such domains compared to say C++ ?
<aminechikhaoui> curious to know the origins of such choice
<gchristensen> yep
<gchristensen> expensive validation and performance tuning makes it still viable and useful
<aminechikhaoui> interesting
<gchristensen> oy, graphviz is great until it isn't
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<infinisil> GitHub down!
<infinisil> Oh, works now
<infinisil> I got two 500's in a row
Remosi- is now known as Remosi
<samueldr> it had spottiness issues over the week-end
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<eyJhb> gchristensen: I am still a little in doubt if I should use graphviz or just stick with Lucidchart..
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<gchristensen> I've resorted to pictures of my white board
<clever> time to try and fix plex media player, for the 4th or 5th time
<clever> unstable has been really unstable lately!
<gchristensen> what's wrongh with it? :)
<clever> first, it was qtwebengine not building
<clever> the day i found the problem, somebody merged a pr fixing it
<clever> now qtbase isnt building
<eyJhb> gchristensen: Use gimp to remove all the white
<eyJhb> Then it looks nice :%
<samueldr> pro-tip: use the Levels tool
<eyJhb> Levels?
<samueldr> Colors -> Levels
<clever> qeglfskmsegldevice.cpp:80:22: error: no declaration matches 'Display* QEglFSKmsEglDevice::nativeDisplay() const' EGLNativeDisplayType QEglFSKmsEglDevice::nativeDisplay() const
<clever> the latest failure
<clever> builder for '/nix/store/k4gdaxbhrq7ibkf0l1xy3apws13a29qh-qtbase-5.9.7.drv' failed with exit code 2
<samueldr> bad example due to (1) small size (2) atrocious jpeg artifacting
<gchristensen> oh cool, samueldr
<samueldr> and use of colours
<samueldr> but levels allows you to play with the black and white levels, or even select what is "black" and what is "white" in your image
<clever> gchristensen: oh, and lua was failing to build at one point too, lol
<samueldr> if you want transparency, don't simply delete the white area!
<samueldr> right click the layer
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<samueldr> add a layer mask, choose "grayscale copy of layer" and "invert mask"
<eyJhb> ... If this work on my image for my rapport I am happy AND sad..
<samueldr> TERRIBLE example, but from there hopefully y'all can connect the dots :)
<eyJhb> samueldr: hmm
<eyJhb> Seems nice, but I suck at using it already
<samueldr> use it more, you'll suck less :3
<eyJhb> But I hate images :( I mostly give it to someone, and then she does it :(
<samueldr> I often use levels with masks to make borders smoother after cutting an image for "dank meme potential" and such
<eyJhb> But can I e.g. make the white stand really out, select that, delete all that area and return it to "original" color
<samueldr> that's an option, yes
<samueldr> invert my steps
<samueldr> apply the layer mask first
<samueldr> then select the layer mask
<samueldr> then, use levels
<eyJhb> Ahh, but you see, that somewhat assumes I know anything about gimp
<samueldr> please try harder :D
<samueldr> (sorry)
<samueldr> kinda uncalled for
<eyJhb> :( Meany :D
<samueldr> it's so second nature to me, thinking about how I must be using it since early 2000s
<clever> gchristensen: and bisect wants to build llvm :(
<eyJhb> Eh, I have done most of it, but I am somewhat confused about what should be what color atm :p
<eyJhb> The square pattern should be everywhere, or only on the "object"?
<samueldr> square pattern?
<eyJhb> I feel like something is wrong here :p
<samueldr> ah, yes, that's transparency
<samueldr> when you see that pattern, in an image editing software, it's transparency
<samueldr> so you want the white bits to become transparent
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<eyJhb> So I want my square pattern (transparency), to be on the white and not my object?
<eyJhb> samueldr: it is okay to give up on me :p But it seems nice once you know how to use it in a good way
<samueldr> ah, missed the message
<samueldr> yes, on the white
<samueldr> and I do understand how it's hard to understand
<eyJhb> I am really good at getting my object transparent, but not so much the white
<eyJhb> But I did something! And it almost worked
<samueldr> you have to add a couple years of using and learning photoshop to my gimp experience, too
<samueldr> some skills do translate :)
<eyJhb> I managed to do this - https://i.imgur.com/YAwG0ai.png
<eyJhb> Copyright - Some friend 2019
<eyJhb> :D
<eyJhb> With a little adjustment it looks acceptable
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<samueldr> you could use Colors -> Invert on the mask
<samueldr> but you'd still have *some* transparency on the coloured bits
<eyJhb> I had all transparency on the colored bits, then I just used the magic wand to select everything else
<eyJhb> I feel like I am abusing Gimp atm
<samueldr> you may be :D
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<eyJhb> Anyway, if I am going to have any chance tomorrow for hitting the gym in the morning I should go now! So night night o/
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