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Re: [RFC] A privileged pmcd co-process

To: Nathan Scott <nathans@xxxxxxxxxx>
Subject: Re: [RFC] A privileged pmcd co-process
From: "Frank Ch. Eigler" <fche@xxxxxxxxxx>
Date: Tue, 24 Jun 2014 07:57:37 -0400
Cc: PCP <pcp@xxxxxxxxxxx>
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Hi -

> [...]  In this cunning plan, there is only one pmcd, as now, and it
> has only one helper co-process which provides services (in
> particular, it serves namespace file descriptors) to the other pmcd
> (IOW to DSO PMDAs) and to process PMDAs that export data that is
> affected by specific namespaces.

You're right, I did totally misread your suggestion.  Let me try a
second simplified rephrasing: you're envisioning the systemwide pmcd
and pmda processes switching to/from container namespaces to service
individual requests?  Kind of like the linux_proc pmda doing temporary
setuid() downgrades?

- FChE

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