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Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case [message #1303 is a reply to message #1301]

Mon, 06 February 2006 14:51

serue
Messages: 750
Registered: February 2006

Senior Member

Quoting Alexey Kuznetsov (kuznet@ms2.inr.ac.ru):
> > > 2. It is very inconvenient not to see processes inside VPS from host system.
> > > To do ps, strace, gdb etc. we have to move inside VPS. With VPID approach I can
> > > gdb even "init" process of VPS in a way invisible to VPS, see?
> >
> > that's another container model issue again. your init process of a VPS
> > could be the real init. why do you need a fake one ? just trying to
> > understand all the issues you had to solve and I'm sure they are valid.
>
> It is not a fake init, it is a real init. Main goal of openvz is to allow
> to start even f.e. the whole instance of stock redhat inside container
> including standard init. It is not a strict architectural requirement,
> but this option must be present.
>
> BTW the question sounds strange. I would think that in (container, pid)
> approach among another limitations you get requirement that you _must_
> have a child reaper inside container. With VPIDs this does not matter,
> wait() made by parent inside host always returns global pid of child.
> But with (container, pid) children can be reaped only inside container, right?

Nah, we can just special-case the lookup for pid==1 to always return the
single real init, or insert the single real init into the pidhash for
every container.

If we're going to provide the option which you need to have your own
init, then I guess the best behavior is to add a flag to whatever
mechanism creates a container specifying to either hash the real init
into the pidhash, or make the first exec()d process the container's
init? Does that seem reasonable?

thanks,
-serge

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[Message index]

		[RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach) By: Kirill Korotaev on Thu, 02 February 2006 15:54
		[RFC][PATCH 1/7] VPIDs: add VPID config option By: dev on Thu, 02 February 2006 16:16
		[RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: dev on Thu, 02 February 2006 16:21
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: ebiederm on Wed, 08 February 2006 20:29
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: Alexey Kuznetsov on Wed, 08 February 2006 23:53
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: ebiederm on Thu, 09 February 2006 00:37
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: Alexey Kuznetsov on Thu, 09 February 2006 01:11
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: ebiederm on Thu, 09 February 2006 01:36
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: serue on Thu, 09 February 2006 02:51
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: Alexey Kuznetsov on Thu, 09 February 2006 09:55
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: ebiederm on Thu, 09 February 2006 19:22
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: dev on Mon, 20 February 2006 14:55
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: Herbert Poetzl on Mon, 20 February 2006 16:56
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: dev on Tue, 21 February 2006 16:17
		Re: [RFC][PATCH 2/7] VPIDs: pid/vpid conversions By: Herbert Poetzl on Tue, 21 February 2006 23:17
		[RFC][PATCH 3/7] VPIDs: fork modifications By: dev on Thu, 02 February 2006 16:24
		Re: [RFC][PATCH 3/7] VPIDs: fork modifications By: Cedric Le Goater on Thu, 02 February 2006 20:08
		[RFC][PATCH 4/7] VPIDs: vpid macros in non-VPID case By: Kirill Korotaev on Thu, 02 February 2006 16:26
		[RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Kirill Korotaev on Thu, 02 February 2006 16:30
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Dave Hansen on Thu, 02 February 2006 17:05
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: serue on Thu, 02 February 2006 19:29
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Alexey Kuznetsov on Fri, 03 February 2006 10:52
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Cedric Le Goater on Fri, 03 February 2006 12:48
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Alexey Kuznetsov on Fri, 03 February 2006 14:02
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Dave Hansen on Fri, 03 February 2006 16:25
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Alexey Kuznetsov on Mon, 06 February 2006 11:24
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Cedric Le Goater on Fri, 03 February 2006 17:05
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Alexey Kuznetsov on Mon, 06 February 2006 09:48
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: serue on Mon, 06 February 2006 14:51
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Alexey Kuznetsov on Mon, 06 February 2006 15:51
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: serue on Mon, 06 February 2006 16:24
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Cedric Le Goater on Tue, 07 February 2006 09:46
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: dev on Tue, 07 February 2006 11:42
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Cedric Le Goater on Tue, 07 February 2006 12:59
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Cedric Le Goater on Tue, 07 February 2006 09:15
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: dev on Fri, 03 February 2006 14:03
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Cedric Le Goater on Fri, 03 February 2006 15:40
		Re: [RFC][PATCH 5/7] VPIDs: vpid/pid conversion in VPID enabled case By: Kirill Korotaev on Fri, 03 February 2006 16:26
		[RFC][PATCH 6/7] VPIDs: small proc VPID export By: Kirill Korotaev on Thu, 02 February 2006 16:31
		[RFC][PATCH 7/7] VPIDs: required VPS interface for VPIDs By: Kirill Korotaev on Thu, 02 February 2006 16:32
		Re: [RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach) By: Herbert Poetzl on Fri, 03 February 2006 03:01
		Re: [RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach) By: Kirill Korotaev on Fri, 03 February 2006 10:30
		Re: [RFC][PATCH] VPIDs: Virtualization of PIDs (OpenVZ approach) By: Alexey Kuznetsov on Fri, 03 February 2006 12:45

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