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Instant boot Linux? (lemmy.world)

submitted 1 week ago by Fmstrat@lemmy.world to c/linux@programming.dev

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Hi all,

Is there a method out there that can "save a hibernate state" to disk, and just permanently boot immediately into that state every time?

It would be OK to lose data used after this point. And ot would also be OK if it required building a custom image based on the hardware, similar to embedded systems.

The goal is to be able to, as quickly as possible, spin up a GPU server when needed, but without using suspend/resume.

Thanks.

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[–] HelloRoot@lemy.lol 0 points 1 week ago* (last edited 1 week ago) (1 children)

For my two systems (pc and laptop)with 32GB RAM each it takes ~4 minutes to boot from hibernation.

Which is expexted afaik.

Thats the opposite of "instant".

[–] khleedril@cyberplace.social 6 points 1 week ago (1 children)

@HelloRoot @Die4Ever There is something wrong with your setup.

[–] HelloRoot@lemy.lol 1 points 1 week ago* (last edited 1 week ago) (1 children)

No not really.

It's how long it takes to read 32GB from my swap. 170 MB/s continuous read speed ≈ 188 sec (3 min 8 sec) add the normal boot time to it (bios, grub, kernel initramfs) and you get the 4 minutes.

When the system boots cold it doesn't have to read 32GB, just 0.5-2GB maybe.

[–] Fmstrat@lemmy.world 4 points 1 week ago (1 children)

If you are writing the full 32GB, something is wrong. Shared memory isn't written twice.

[–] HelloRoot@lemy.lol 1 points 1 week ago

You might be right. But I still have no clue how to properly set it up.