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From: Oren Laadan <orenl@cs.columbia.edu>
To: Andrey Mirkin <major@openvz.org>
Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org
Subject: Re: [PATCH 0/9] OpenVZ kernel based checkpointing/restart
Date: Thu, 04 Sep 2008 04:14:35 -0400	[thread overview]
Message-ID: <48BF98EB.5080602@cs.columbia.edu> (raw)
In-Reply-To: <1220439476-16465-1-git-send-email-major@openvz.org>



Andrey Mirkin wrote:
> 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:

Thanks Andrey. I'll take a close look at it by the weekend. Just a couple
of comments after a very brief look at the code:

> 
> * 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.

Actually, my patch is written to checkpoint from outside the context of the
target task;  for simplicity only, it is applied to the current process.

> 
> * 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.

Here, too, handling of namespaces was left out in order to provide a simple
proof of concept. In fact, spawning a new process and entering a new namespace
can be easily done in user-space.

Oren.

> 
> * 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.
> _______________________________________________
> Containers mailing list
> Containers@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/containers

  parent reply	other threads:[~2008-09-04  8:14 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-03 10:57 [PATCH 0/9] OpenVZ kernel based checkpointing/restart Andrey Mirkin
2008-09-03 10:57 ` [PATCH 1/9] Introduce trivial sys_checkpoint and sys_restore system calls Andrey Mirkin
2008-09-03 10:57   ` [PATCH 2/9] Make checkpoint/restart functionality modular Andrey Mirkin
2008-09-03 10:57     ` [PATCH 3/9] Introduce context structure needed during checkpointing/restart Andrey Mirkin
2008-09-03 10:57       ` [PATCH 4/9] Introduce container dump function Andrey Mirkin
2008-09-03 10:57         ` [PATCH 5/9] Introduce function to dump process Andrey Mirkin
2008-09-03 10:57           ` [PATCH 6/9] Introduce functions to dump mm Andrey Mirkin
2008-09-03 10:57             ` [PATCH 7/9] Introduce function for restarting a container Andrey Mirkin
2008-09-03 10:57               ` [PATCH 8/9] Introduce functions to restart a process Andrey Mirkin
2008-09-03 10:57                 ` [PATCH 9/9] Introduce functions to restore mm Andrey Mirkin
2008-09-03 14:32                 ` [PATCH 8/9] Introduce functions to restart a process Louis Rilling
2008-09-13 17:34                   ` Pavel Machek
2008-09-03 14:17             ` [PATCH 6/9] Introduce functions to dump mm Louis Rilling
2008-09-03 14:23         ` [PATCH 4/9] Introduce container dump function Serge E. Hallyn
2008-09-03 14:45           ` Andrey Mirkin
2008-09-03 12:29       ` [PATCH 3/9] Introduce context structure needed during checkpointing/restart Matthieu Fertré
2008-09-03 14:11         ` Andrey Mirkin
2008-09-03 13:56       ` Louis Rilling
2008-09-03 14:07         ` Andrey Mirkin
2008-09-03 14:13       ` Cedric Le Goater
2008-09-03 14:29         ` Andrey Mirkin
2008-09-03 14:27     ` [PATCH 2/9] Make checkpoint/restart functionality modular Serge E. Hallyn
2008-09-03 14:51       ` Andrey Mirkin
2008-09-03 11:44   ` [PATCH 1/9] Introduce trivial sys_checkpoint and sys_restore system calls Cedric Le Goater
2008-09-03 13:05     ` [Devel] " Andrey Mirkin
2008-09-03 12:28 ` [PATCH 0/9] OpenVZ kernel based checkpointing/restart Cedric Le Goater
2008-09-03 13:59   ` [Devel] " Andrey Mirkin
2008-09-04 22:55     ` Dave Hansen
2008-09-03 14:18   ` Serge E. Hallyn
2008-09-03 13:49 ` Louis Rilling
2008-09-03 14:06   ` Louis Rilling
2008-09-03 14:19     ` Andrey Mirkin
2008-09-03 14:26     ` Cedric Le Goater
2008-09-03 14:53       ` Andrey Mirkin
2008-09-04  8:14 ` Oren Laadan [this message]
2008-09-04 14:05 ` Dave Hansen
2008-10-17 23:33 ` Dave Hansen
2008-10-20 11:10   ` Louis Rilling
2008-10-20 13:25     ` Daniel Lezcano
2008-10-20 13:48       ` Cedric Le Goater
2008-10-20 13:49         ` Daniel Lezcano
2008-10-20 15:53       ` Oren Laadan
2008-10-20 16:37         ` Daniel Lezcano
2008-10-20 17:23           ` Serge E. Hallyn
2008-10-21  0:18             ` Oren Laadan
2008-10-21  0:58               ` Serge E. Hallyn
2008-10-21 13:24               ` Daniel Lezcano
2008-10-27 14:45           ` [Devel] " Andrey Mirkin
2008-10-20 16:51         ` Serge E. Hallyn
2008-10-21  9:36         ` Cedric Le Goater
2008-10-20 16:36     ` Dave Hansen
2008-10-20 12:14   ` [Devel] " Andrey Mirkin
2008-10-20 15:55     ` Dave Hansen
2008-10-27 14:07       ` Andrey Mirkin
2008-10-27 14:39         ` Oren Laadan
2008-10-30  6:02           ` Andrey Mirkin
2008-10-30 11:47             ` Louis Rilling
2008-10-30 17:08               ` Dave Hansen
2008-10-30 18:01                 ` Louis Rilling
2008-10-30 18:28                   ` Oren Laadan
2008-10-30 17:45               ` Oren Laadan
2008-10-30 18:14                 ` Louis Rilling
2008-10-30 18:32                   ` Oren Laadan
2008-10-31 10:37                     ` Louis Rilling
2008-10-30 14:08             ` Serge E. Hallyn
2008-10-30 17:03             ` Dave Hansen
2008-11-03 19:35         ` Oren Laadan
2008-10-20 17:17     ` Oren Laadan
2008-10-27 14:38       ` Andrey Mirkin

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