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Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters [message #5502 is a reply to message #5494]

Tue, 22 August 2006 01:45

Rohit Seth
Messages: 101
Registered: August 2006

Senior Member

On Mon, 2006-08-21 at 14:45 -0700, Chandra Seetharaman wrote:
> On Mon, 2006-08-21 at 17:24 +0400, Kirill Korotaev wrote:
> > Chandra Seetharaman wrote:
> > > Kirill,
> > >
> > > Here are some concerns I have (as of now) w.r.t using UBC for resource
> > > management (in the context of resource groups).
> > >
> > > - guarantee support is missing. I do not see any code to provide the
> > > minimum amount of resource a group can get. It is important for
> > > providing QoS. (In a different email you did mention guarantee, i am
> > > referring it here for completeness).
> > I mentioned a couple of times that this is a limited core functionality
> > in this patch set.
> > guarantees are implementable as a separate UBC parameters.
>
> I will wait for oomguarpages patches :)
>
> >
> > > - Creation of a UBC and assignment of task to a UBC always happen in
> > > the context of the task that is affected. I can understand it works in
> > > OpenVZ environment, but IMO has issues if one wants it to be used for
> > > basic resource management
> > > - application needs to be changed to use this feature.
> > > - System administrator does not have the control to assign tasks to a
> > > UBC. Application does by itself.
> > > - Assignment of task to a UBC need to be transparent to the
> > > application.

I agree with the above points. Just want to add that assignment of a
task to a container may not be transparent to the application. For
example it may hit some limits and some reclaim may happen...

> > this is not 100% true.
> > UBC itself doesn't prevent from changing context on the fly.
> > But since this leads to part of resources to be charged to
> > one UBC and another part to another UBC and so long and so
>
> Let the controllers and the users worry about that part.
>

I think as the tasks move around, it becomes very heavy to move all the
pages belonging to previous container to a new container.

> As I mentioned UBC might be perfect for container resource management,
> but what I am talking for is resource management _without_ a container.
>

Can you explain that part a bit more?

> >
> > > - No ability to maintain resource specific data in the controller.
> > it's false. fields can be added to user_beancounter struct easily.
> > and that's what our controllers do.
>
> With the model of static array for resources (struct ubparm ub_parms
> [UB_RESOURCES] in struct user_beancounter), it is not be possible to
> attach _different_ "controller specific" information to each of the
> entries.
>
> I do not think it is good idea to add controller specific information of
> _different_ controllers to the user_beancounter. Think of all the fields
> it will have when all the numproc controller needs is just the basic 3-4
> fields.
>

IMO it is okay to add the fields whenever necessary as Kirill
suggested. I think once the container subject gets baked a little more,
the controllers will also get tightly coupled.

> >
> > > - No ability to get the list of tasks belonging to a UBC.
> > it is not true. it can be read from /proc or system calls interface,
> > just like the way one finds all tasks belonging to one user :)
> >
> > BTW, what is so valueable in this feature?
>
> Again, it may not be useful for container type usages (you can probably
> get the list from somewhere else, but for resource management it is
> useful for sysadmins).
>

I'm also debating about whether printing task information is really any
useful. If a sysadm wants to get information about any particular task
then that can come from /proc/<pid>/container Though container list
will be one place where one can easily get the list of all the contained
tasks (and other resources like files).

> >
> > > - For a system administrator name for identification of a UBC is
> > > better than a number (uid).
> > Have you any problems with pids, uids, gids and signals?
>
> Again, in container land each UB is attached with a container hence no
> issue.
>
> In a non-container situation IMO it will be easier to manage/associate
> "gold", "silver", "bronze", "plastic" groups than 0, 11, 83 and 113.
>
>
> > It is a question of interface. I don't mind in changing UBC interface even
> > to configfs if someone really wants it.
> >

Yes please. Thanks.
-rohit

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[Message index]

		[RFC][PATCH] UBC: user resource beancounters By: dev on Wed, 16 August 2006 15:23
		[RFC][PATCH 1/7] UBC: kconfig By: dev on Wed, 16 August 2006 15:34
		Re: [ckrm-tech] [RFC][PATCH 1/7] UBC: kconfig By: Chandra Seetharaman on Fri, 18 August 2006 19:57
		Re: [RFC][PATCH 1/7] UBC: kconfig By: Adrian Bunk on Fri, 18 August 2006 21:14
		Re: [RFC][PATCH 1/7] UBC: kconfig By: Pavel Machek on Fri, 25 August 2006 15:12
		[RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Wed, 16 August 2006 15:35
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Alan Cox on Wed, 16 August 2006 16:38
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Thu, 17 August 2006 11:40
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Andrew Morton on Wed, 16 August 2006 18:18
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Thu, 17 August 2006 11:52
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Greg KH on Wed, 16 August 2006 17:15
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Thu, 17 August 2006 11:43
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Greg KH on Thu, 17 August 2006 12:14
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: Dave Hansen on Thu, 17 August 2006 14:32
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Fri, 18 August 2006 12:34
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Rohit Seth on Wed, 16 August 2006 18:11
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Thu, 17 August 2006 11:52
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Rohit Seth on Thu, 17 August 2006 16:55
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Fri, 18 August 2006 11:13
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Rohit Seth on Fri, 18 August 2006 17:51
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Andrew Morton on Fri, 18 August 2006 05:31
		Re: [PATCH 2/7] UBC: core (structures, API) By: Andrey Savochkin on Fri, 18 August 2006 07:35
		Re: [ckrm-tech] [PATCH 2/7] UBC: core (structures, API) By: Matt Helsley on Fri, 18 August 2006 08:26
		Re: [ckrm-tech] [PATCH 2/7] UBC: core (structures, API) By: dev on Fri, 18 August 2006 11:50
		Re: [RFC][PATCH 2/7] UBC: core (structures, API) By: Alan Cox on Fri, 18 August 2006 15:39
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: Srivatsa Vaddagiri on Thu, 17 August 2006 11:09
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: dev on Thu, 17 August 2006 14:00
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: Chandra Seetharaman on Thu, 17 August 2006 18:59
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: Matt Helsley on Fri, 18 August 2006 01:58
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: Balbir Singh on Sun, 20 August 2006 05:01
		Re: [ckrm-tech] [RFC][PATCH 2/7] UBC: core (structures, API) By: Balbir Singh on Sun, 20 August 2006 04:58
		[RFC][PATCH 3/7] UBC: ub context and inheritance By: dev on Wed, 16 August 2006 15:36
		Re: [RFC][PATCH 3/7] UBC: ub context and inheritance By: Alan Cox on Wed, 16 August 2006 16:31
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: Srivatsa Vaddagiri on Thu, 17 August 2006 11:09
		Re: Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: xemul on Thu, 17 August 2006 13:21
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: Matt Helsley on Fri, 18 August 2006 02:42
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: dev on Fri, 18 August 2006 09:21
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: Matt Helsley on Sat, 19 August 2006 02:19
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: Chandra Seetharaman on Fri, 18 August 2006 20:03
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: dev on Mon, 21 August 2006 10:30
		Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance By: Chandra Seetharaman on Mon, 21 August 2006 20:48
		[RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Wed, 16 August 2006 15:37
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Alan Cox on Wed, 16 August 2006 16:32
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Alan Cox on Wed, 16 August 2006 18:44
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Rohit Seth on Wed, 16 August 2006 19:22
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Thu, 17 August 2006 12:11
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Andrew Morton on Thu, 17 August 2006 15:40
		Re: [PATCH 4/7] UBC: syscalls (user interface) By: Andrey Savochkin on Fri, 18 August 2006 08:08
		Re: [ckrm-tech] [PATCH 4/7] UBC: syscalls (user interface) By: Dave Hansen on Fri, 18 August 2006 14:45
		Re: [ckrm-tech] [PATCH 4/7] UBC: syscalls (user interface) By: Magnus Damm on Mon, 21 August 2006 02:47
		Re: [ckrm-tech] [PATCH 4/7] UBC: syscalls (user interface) By: Rohit Seth on Tue, 22 August 2006 01:16
		Re: [ckrm-tech] [PATCH 4/7] UBC: syscalls (user interface) By: Magnus Damm on Tue, 22 August 2006 03:58
		Re: [ckrm-tech] [PATCH 4/7] UBC: syscalls (user interface) By: Chandra Seetharaman on Tue, 22 August 2006 18:34
		Re: [ckrm-tech] [PATCH 4/7] UBC: syscalls (user interface) By: Rohit Seth on Thu, 24 August 2006 01:20
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Fri, 18 August 2006 11:03
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Rohit Seth on Thu, 17 August 2006 17:08
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Greg KH on Wed, 16 August 2006 17:17
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Thu, 17 August 2006 12:00
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Rohit Seth on Wed, 16 August 2006 18:17
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Thu, 17 August 2006 12:03
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Rohit Seth on Thu, 17 August 2006 17:05
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Srivatsa Vaddagiri on Thu, 17 August 2006 11:09
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Thu, 17 August 2006 14:03
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Srivatsa Vaddagiri on Thu, 17 August 2006 16:19
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Matt Helsley on Fri, 18 August 2006 02:31
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: dev on Fri, 18 August 2006 11:43
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Matt Helsley on Sat, 19 August 2006 02:43
		Re: [ckrm-tech] [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Chandra Seetharaman on Fri, 18 August 2006 20:13
		Re: [RFC][PATCH 4/7] UBC: syscalls (user interface) By: Arnd Bergmann on Fri, 18 August 2006 11:40
		[RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Wed, 16 August 2006 15:39
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Alan Cox on Wed, 16 August 2006 16:35
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Thu, 17 August 2006 13:45
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Wed, 16 August 2006 18:47
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Wed, 16 August 2006 19:15
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Alan Cox on Thu, 17 August 2006 00:02
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Thu, 17 August 2006 16:36
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Fri, 18 August 2006 08:43
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Thu, 17 August 2006 13:33
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Thu, 17 August 2006 17:13
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Fri, 18 August 2006 08:47
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Thu, 17 August 2006 13:29
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Thu, 17 August 2006 14:36
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Fri, 18 August 2006 08:12
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Fri, 18 August 2006 14:43
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Mon, 21 August 2006 08:56
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Wed, 16 August 2006 18:24
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Thu, 17 August 2006 13:25
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Thu, 17 August 2006 14:38
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Fri, 18 August 2006 09:29
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Fri, 18 August 2006 14:58
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Mon, 21 August 2006 10:38
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Mon, 21 August 2006 15:10
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Dave Hansen on Fri, 18 August 2006 15:06
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Mon, 21 August 2006 12:36
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Thu, 17 August 2006 17:02
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Fri, 18 August 2006 09:36
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Fri, 18 August 2006 16:55
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Mon, 21 August 2006 10:41
		Re: [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Rohit Seth on Tue, 22 August 2006 01:23
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Chandra Seetharaman on Fri, 18 August 2006 20:26
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: dev on Mon, 21 August 2006 10:48
		Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) By: Chandra Seetharaman on Mon, 21 August 2006 20:55
		[RFC][PATCH 6/7] UBC: kernel memory acconting (mark objects) By: dev on Wed, 16 August 2006 15:40
		Re: [RFC][PATCH 6/7] UBC: kernel memory acconting (mark objects) By: Alan Cox on Wed, 16 August 2006 16:36
		[RFC][PATCH 7/7] UBC: proc interface By: dev on Wed, 16 August 2006 15:42
		Re: [RFC][PATCH 7/7] UBC: proc interface By: Greg KH on Wed, 16 August 2006 17:13
		Re: [RFC][PATCH 7/7] UBC: proc interface By: dev on Thu, 17 August 2006 13:41
		Re: [RFC][PATCH 7/7] UBC: proc interface By: Greg KH on Thu, 17 August 2006 15:40
		Re: Re: [RFC][PATCH 7/7] UBC: proc interface By: kir on Thu, 17 August 2006 16:12
		Re: [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Wed, 16 August 2006 19:06
		Re: [RFC][PATCH] UBC: user resource beancounters By: Rohit Seth on Wed, 16 August 2006 18:53
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Thu, 17 August 2006 00:15
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Srivatsa Vaddagiri on Thu, 17 August 2006 11:02
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: dev on Thu, 17 August 2006 13:53
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Thu, 17 August 2006 19:55
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 18 August 2006 19:39
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: dev on Mon, 21 August 2006 13:21
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Mon, 21 August 2006 21:45
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Mon, 21 August 2006 22:01
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Mon, 21 August 2006 22:44
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Rohit Seth on Tue, 22 August 2006 01:45
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Tue, 22 August 2006 09:42
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Arjan van de Ven on Tue, 22 August 2006 09:57
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Tue, 22 August 2006 10:54
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Rohit Seth on Thu, 24 August 2006 01:31
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Tue, 22 August 2006 18:55
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Rohit Seth on Thu, 24 August 2006 01:44
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Thu, 24 August 2006 02:04
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Thu, 24 August 2006 10:49
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Thu, 24 August 2006 23:48
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Kyle Moffett on Thu, 24 August 2006 23:55
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 25 August 2006 18:21
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Fri, 25 August 2006 20:25
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 25 August 2006 21:37
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Fri, 25 August 2006 22:30
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 25 August 2006 22:59
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Rohit Seth on Thu, 24 August 2006 17:27
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Thu, 24 August 2006 23:52
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: dev on Fri, 25 August 2006 11:10
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 25 August 2006 18:47
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Fri, 25 August 2006 20:32
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 25 August 2006 22:23
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Alan Cox on Fri, 25 August 2006 22:51
		Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters By: Chandra Seetharaman on Fri, 25 August 2006 23:00

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