Messages in this thread | | | From | Andrey Mirkin <> | Subject | [PATCH 0/10] OpenVZ kernel based checkpointing/restart (v2) | Date | Sat, 18 Oct 2008 03:11:28 +0400 |
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These patchset introduces kernel based checkpointing/restart as it is implemented in OpenVZ project. This version (v2) supports multiple processes with simple private memory and open files (regular files).
Todo: - Create processes with the same PID during restart - Add support for x86-64 - Add support for shared objects
Changelog:
18 Oct 2008 (v2): - Add support for multiple processes - Cleanup and bug fixes
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This patchset introduces kernel based checkpointing/restart as it is implemented in OpenVZ project. This patchset has limited functionality and are able to checkpoint/restart only single process. Recently Oren Laaden sent another kernel based implementation of checkpoint/restart. The main differences between this patchset and Oren's patchset are:
* In this patchset checkpointing initiated not from the process (right now we do not have a container, only namespaces), Oren's patchset performs checkpointing from the process context.
* Restart in this patchset is initiated from process, which restarts a new process (in new namespaces) with saved state. Oren's patchset uses the same process from which restart was initiated and restore saved state over it.
* Checkpoint/restart functionality in this patchset is implemented as a kernel module
As checkpointing is initiated not from the process which state should be saved we should freeze a process before saving its state. Right now Container Freezer from Matt Helsley can be used for this.
This patchset introduce only a concept how kernel based checkpointing/restart can be implemented and are able to checkpoint/restart only a single process with simple VMAs.
I've tried to split my patchset in small patches to make review more easier.
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