linux-kernel - Re: "partial" container checkpoint

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Message-ID: <6599ad830904141706j46d59a00r9f497dd34ec29d9@mail.gmail.com>
Date:	Tue, 14 Apr 2009 17:06:57 -0700
From:	Paul Menage <menage@...gle.com>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	"Serge E. Hallyn" <serue@...ibm.com>,
	Oren Laadan <orenl@...columbia.edu>, xemul@...allels.com,
	containers@...ts.linux-foundation.org, mingo@...e.hu,
	linux-kernel@...r.kernel.org, hch@...radead.org,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: "partial" container checkpoint

On Tue, Apr 14, 2009 at 9:37 AM, Dave Hansen <dave@...ux.vnet.ibm.com> wrote:
> On Tue, 2009-04-14 at 10:29 -0500, Serge E. Hallyn wrote:
>> I think the perceived need for it comes, as above, from the pure
>> checkpoint-a-whole-container-only view.  So long as you will
>> checkpoint/restore a whole container, then you'll end up doing
>> something requiring privilege anyway.  But that is not all of
>> the use cases.
>
> Yeah, there are certainly a lot of shades of gray here.  I've been
> talking to some HPC guys in the last couple of days.  They certainly
> have a need for checkpoint/restart, but much less of a need for doing
> entire containers.

We'd certainly like the ability to migrate jobs that might be in their
own pid namespace, but not in their own network/IPC/user/etc
namespaces.

Paul
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