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Re: [RFC][PATCH 1/5] Virtualization/containers: startup [message #1294 is a reply to message #1292] Mon, 06 February 2006 08:58 Go to previous messageGo to previous message
dev is currently offline  dev
Messages: 1693
Registered: September 2005
Location: Moscow
Senior Member
>>I think that a patch like this - particularly just the 1/5 part - makes
>>total sense, because regardless of any other details of virtualization,
>>every single scheme is going to need this.
> I strongly disagree with this approach. I think Al Viro got it
> right when he created a separate namespace for filesystems.
These patch set introduces separate namespaces as those in filesystems.
What exactly you don't like in this approach? Can you be more specific?

> First this presumes an all or nothing interface. But that is not
> what people are doing. Different people want different subsets
> of the functionality. For the migration work I am doing having
> multiple meanings for the same uid isn't interesting.
What do you mean by that? That you don't care about virtualization of
UIDs? So your migration doesn't care at all whether 2 systems have same
uids? Do you keep /etc/passwd in sync when do migration?
Only full virtualization allows to migrate applications without bugs and
different effects.

> Secondly by implementing this in one big chunk there is no
> migration path when you want to isolate an additional part of the
> kernel interface.
>
> So I really think an approach that allows for incremental progress
> that allows for different subsets of this functionality to
> be used is a better approach. In clone we already have
> a perfectly serviceable interface for that and I have
> seen no one refute that. I'm not sure I have seen anyone
> get it though.
Just introduce config option for each virtualization functionality.
That's it.

> My apologies for the late reply I didn't see this thread until
> just a couple of minutes ago. linux-kernel can be hard to
> follow when you aren't cc'd.
>
>
> Patches hopefully sometime in the next 24hours. So hopefully
> conversation can be carried forward in a productive manner.
Ok. I will remake them either :)

Kirill

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