this post was submitted on 17 Apr 2024
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KDE Neon using tmpfs for /tmp seems like an horrible idea? (lemmy.kde.social)
submitted 7 months ago by lumirell@lemmy.kde.social to c/kde@lemmy.kde.social
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I get the idea behind it for sure but why use our available ram for this? I thought whatever init functionality would just wipe clean /tmp at boot.

Right now what I'm looking at is that if a system has 16gbram KDE Neon uses half of it for /tmp.

The thing is applications could output to /tmp for a plethora of reasons that could maximize that. Whether you are a content creator or processing data of some sort leaving trails in /tmp the least I want is my ram being used for this thing regardless.

Basically if you drop-in a 10GB file in /tmp right now (if your setup has tmpfs active) you will see a 10GB usage in your htop. Example in https://imgur.com/a/S9JIz9p

I'm not here to pick a fight but as a new KDE Neon user I'm scratching my head on the why after years in Arch Linux.

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[–] recursive_recursion@programming.dev 3 points 7 months ago (1 children)

wouldn't that open up additional vulnerabilities?

[–] CameronDev@programming.dev 2 points 7 months ago

Are you thinking rowhammer? My understanding is limited, but doesnt rowhammer require being able to write to memory at a consistent address, co-located with the data being attacked? Im not sure thats doable with tmpfs, but probably worth an investigation by someone more knowledgable than me :)