cryopid

Process restart in linux

Systems & Infrastructure

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4Mentions

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160GitHub stars

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What it is

Process restart in linux

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Where it is used

No documented product use has been verified yet.

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

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Mentions over time

HN mentions by year4 dated mentions

Observed mentions: 2015-07-19 01:18:05 UTC to 2024-11-21 09:36:43 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Comments
2015	2015-01-01 00:00:00 UTC	2016-01-01 00:00:00 UTC	1	1
2016	2016-01-01 00:00:00 UTC	2017-01-01 00:00:00 UTC	0	0
2017	2017-01-01 00:00:00 UTC	2018-01-01 00:00:00 UTC	0	0
2018	2018-01-01 00:00:00 UTC	2019-01-01 00:00:00 UTC	0	0
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	1	1
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	1	1
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	0	0
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	0	0
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	0	0
2024	2024-01-01 00:00:00 UTC	2025-01-01 00:00:00 UTC	1	1

What Hacker News says

4 sources

harry8·Nov 21, 2024

There used to be cryopid in the days of 32 bit x86 and it was great and Bernard is cool. https://github.com/maaziz/cryopid Somehow I doubt it's still a thing but haven't had a reason to check.

In Why one would use Qubes OS? (2023)

enriquto·Feb 28, 2020

yes, but this is a mock-up of a real freeze. What I want is independent of tmux: a way to freeze a process and all its children and save it into a file. The file is then opened when rebooting, or even on a different computer. There was this: https://github.com/maaziz/cryopid

In Unix as IDE (2012)

derefr·Nov 25, 2019

What is “suspending”? Like what https://github.com/maaziz/cryopid does? No OS uses such a technique for production process management. (Well, I guess you could say that Genode does if you consider VMs to be processes.) Processes are too non-self-sufficient for this to work with full generality. (For example, what would a process do if it “freezes” in the middle of executing within a shared library’s code section, and then an OS update is applied, replacing that library on disk? The “defrost” process would presumably re-run the dynamic loader, putting the new version of the library into memory; but now the defrosted thread’s PC points into the middle of an instruction. Oops!) CrypPID-like techniques only work in controlled environments, like if you’ve got a machine serving solely as a Docker container host and you want to “pause” container

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s. On the other hand, if by “suspending” you mean “the OS asks the program to persist its running state to disk, which it can easily do because it’s using GUI-control and scene-graph frameworks that know how to serialize out their current state”—and then, when it has done this, the OS considers the process “clean” (like a clean page of disk cache) and therefore discardable—then yes, the OS is suspending processes. Keep in mind that you need to add a flag to your application’s OS-readable metadata (the application manifest in Windows; the Info.plist in macOS/iOS) opting into this behaviour, signalling that your process is okay with being shut down at any time when it’s in the OS-visible “clean” state, and isn’t, say, a host for an RPC server that other applications are expecting to have a stable connection to.

In Designing Windows 95's User Interface (2018)

icebraining·Jul 19, 2015

You can, there's a process freezing utility for Linux; I'll see if I can remember its name. EDIT: Here is it: CryoPID (https://github.com/maaziz/cryopid) CryoPID allows you to capture the state of a running process in Linux and save it to a file. This file can then be used to resume the process later on, either after a reboot or even on another machine.

In A subsystem to restrict programs into a “reduced feature operating model”