this post was submitted on 28 Oct 2024
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Rootless docker breaks Hyper-V dynamic memory (self.linux)
submitted 1 day ago* (last edited 1 day ago) by sgibson5150 to c/linux@programming.dev
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Guest OS is Debian 12.7, no desktop environment. VM was created with Powershell so that I could specify the Configuration Version (9.0). This VM is intended to be migrated to a Server 2019 host.

I have a series of checkpoints so I can observe the behavior at each. After installing (rootfull) docker, VM memory demand idles around 526 MB. Starting a session and running top doesn't change the memory demand at all.

When I start with the checkpoint where I've made docker rootless, memory demand idles slightly higher before login, maybe 870 MB. When I start a session and run top, though, memory demand skyrockets and assigned memory quickly reaches max dynamic memory, 4096 MB. The output in top barely changes. For giggles I bumped the max to 6 GB and demand still continued to rise.

There are no containers defined in either case. Any ideas about what I'm seeing?

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