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Re: [RFC][PATCH 6/7] Account for the number of tasks within container [message #10943 is a reply to message #10912]

Thu, 08 March 2007 13:49

Paul Menage
Messages: 642
Registered: September 2006

Senior Member

On 3/6/07, Pavel Emelianov <xemul@sw.ru> wrote:
> The idea is:
>
> Task may be "the entity that allocates the resources" and "the
> entity that is a resource allocated".
>
> When task is the first entity it may move across containers
> (that is implemented in your patches). When task is a resource
> it shouldn't move across containers like files or pages do.
>
> More generally - allocated resources hold reference to original
> container till they die. No resource migration is performed.
>
> Did I express my idea cleanly?

Yes, but I disagree with the premise. The title of your patch is
"Account for the number of tasks within container", but that's not
what the subsystem does, it accounts for the number of forks within
the container that aren't directly accompanied by an exit.

Ideally, resources like files and pages would be able to follow tasks
as well. The reason that files and pages aren't easily migrated from
one container to another is that there could be sharing involved;
figuring out the sharing can be expensive, and it's not clear what to
do if two users are in different containers.

But in the case of a task count, there are no such issues with
sharing, so it seems to me to be more sensible (and more efficient) to
just limit the number of tasks in a container.

i.e. when moving a task into a container or forking a task within a
container, increment the count; when moving a task out of a container
or when it exits, decrement the count.

With your approach, if you were to set the task limit of an empty
container A to 1, and then move a process P from B into A, P would be
able to fork a new child, since the "task count" would be 0 (as P was
being charged to B still). Surely the fact that there's 1 process in A
should prevent P from forking?

Paul

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[Message index]

		[RFC][PATCH 0/7] Resource controllers based on process containers By: xemul on Tue, 06 March 2007 14:42
		[RFC][PATCH 1/7] Resource counters By: xemul on Tue, 06 March 2007 14:47
		Re: [RFC][PATCH 1/7] Resource counters By: Balbir Singh on Wed, 07 March 2007 04:03
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Wed, 07 March 2007 07:17
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Fri, 09 March 2007 16:37
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Sun, 11 March 2007 09:01
		Re: [RFC][PATCH 1/7] Resource counters By: ebiederm on Sun, 11 March 2007 19:00
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Mon, 12 March 2007 01:16
		Re: [RFC][PATCH 1/7] Resource counters By: ebiederm on Tue, 13 March 2007 09:09
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Tue, 13 March 2007 09:27
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Tue, 13 March 2007 15:21
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Tue, 13 March 2007 15:41
		Re: [RFC][PATCH 1/7] Resource counters By: Srivatsa Vaddagiri on Tue, 13 March 2007 16:07
		Re: [RFC][PATCH 1/7] Resource counters By: xemul on Wed, 14 March 2007 07:12
		Re: [RFC][PATCH 1/7] Resource counters By: ebiederm on Thu, 15 March 2007 16:51
		Re: Re: [RFC][PATCH 1/7] Resource counters By: dev on Tue, 13 March 2007 09:36
		Re: [RFC][PATCH 1/7] Resource counters By: Herbert Poetzl on Tue, 13 March 2007 16:32
		[RFC][PATCH 2/7] RSS controller core By: xemul on Tue, 06 March 2007 14:53
		Re: [RFC][PATCH 2/7] RSS controller core By: Andrew Morton on Tue, 06 March 2007 22:00
		Re: [RFC][PATCH 2/7] RSS controller core By: dev on Sun, 11 March 2007 12:13
		Re: [RFC][PATCH 2/7] RSS controller core By: Andrew Morton on Sun, 11 March 2007 12:51
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Sun, 11 March 2007 15:51
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Sun, 11 March 2007 19:34
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 01:00
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Mon, 12 March 2007 18:42
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 22:41
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Mon, 12 March 2007 09:02
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 21:11
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Tue, 13 March 2007 07:17
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 15:05
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Tue, 13 March 2007 15:32
		Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 15:10
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Kirill Korotaev on Mon, 12 March 2007 09:10
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Tue, 13 March 2007 09:26
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 15:30
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 10:06
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Andrew Morton on Tue, 13 March 2007 10:49
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 14:59
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Tue, 13 March 2007 17:05
		Re: [RFC][PATCH 2/7] RSS controller core By: mel on Wed, 14 March 2007 15:38
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: Paul Menage on Sun, 18 March 2007 22:44
		Re: Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Mon, 19 March 2007 17:41
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Fri, 09 March 2007 16:48
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Sun, 11 March 2007 09:08
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Sun, 11 March 2007 14:32
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Sun, 11 March 2007 15:04
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 00:41
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Mon, 12 March 2007 08:31
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Mon, 12 March 2007 09:55
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 12 March 2007 23:43
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Tue, 13 March 2007 01:57
		Re: [RFC][PATCH 2/7] RSS controller core By: Srivatsa Vaddagiri on Tue, 13 March 2007 02:24
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 16:06
		Re: [RFC][PATCH 2/7] RSS controller core By: Balbir Singh on Wed, 07 March 2007 05:37
		Re: [RFC][PATCH 2/7] RSS controller core By: xemul on Wed, 07 March 2007 07:25
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Mon, 12 March 2007 23:02
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Sun, 18 March 2007 16:58
		Re: [RFC][PATCH 2/7] RSS controller core By: akpm on Tue, 13 March 2007 06:04
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Tue, 13 March 2007 17:26
		Re: [RFC][PATCH 2/7] RSS controller core By: Alan Cox on Tue, 13 March 2007 19:09
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Fri, 16 March 2007 00:55
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Fri, 16 March 2007 16:31
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Fri, 16 March 2007 18:54
		Re: [RFC][PATCH 2/7] RSS controller core By: mel on Wed, 14 March 2007 16:47
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Tue, 13 March 2007 20:28
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Tue, 13 March 2007 15:11
		Re: [RFC][PATCH 2/7] RSS controller core By: dev on Tue, 13 March 2007 15:54
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Wed, 14 March 2007 20:42
		Re: [RFC][PATCH 2/7] RSS controller core By: mel on Tue, 20 March 2007 18:57
		Re: [RFC][PATCH 2/7] RSS controller core By: Dave Hansen on Fri, 16 March 2007 19:46
		Re: [RFC][PATCH 2/7] RSS controller core By: ebiederm on Sun, 18 March 2007 17:42
		Re: [RFC][PATCH 2/7] RSS controller core By: Herbert Poetzl on Mon, 19 March 2007 15:48
		controlling mmap()'d vs read/write() pages By: Dave Hansen on Tue, 20 March 2007 16:15
		Re: controlling mmap()'d vs read/write() pages By: ebiederm on Tue, 20 March 2007 21:19
		Re: controlling mmap()'d vs read/write() pages By: Herbert Poetzl on Fri, 23 March 2007 00:51
		Re: controlling mmap()'d vs read/write() pages By: Nick Piggin on Fri, 23 March 2007 05:57
		Re: controlling mmap()'d vs read/write() pages By: ebiederm on Fri, 23 March 2007 10:12
		Re: controlling mmap()'d vs read/write() pages By: Dave Hansen on Fri, 23 March 2007 16:41
		Re: controlling mmap()'d vs read/write() pages By: Herbert Poetzl on Fri, 23 March 2007 18:16
		Re: controlling mmap()'d vs read/write() pages By: Balbir Singh on Wed, 28 March 2007 09:18
		Re: controlling mmap()'d vs read/write() pages By: Nick Piggin on Fri, 23 March 2007 10:47
		Re: controlling mmap()'d vs read/write() pages By: ebiederm on Fri, 23 March 2007 12:21
		Re: controlling mmap()'d vs read/write() pages By: Nick Piggin on Wed, 28 March 2007 07:33
		[RFC][PATCH 3/7] Data structures changes for RSS accounting By: xemul on Tue, 06 March 2007 14:55
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: ebiederm on Sun, 11 March 2007 19:13
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: dev on Mon, 12 March 2007 16:16
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: Dave Hansen on Mon, 12 March 2007 16:48
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: xemul on Mon, 12 March 2007 17:19
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: Balbir Singh on Mon, 12 March 2007 17:21
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: Dave Hansen on Mon, 12 March 2007 17:27
		Re: [RFC][PATCH 3/7] Data structures changes for RSS accounting By: xemul on Tue, 13 March 2007 07:10
		[RFC][PATCH 4/7] RSS accounting hooks over the code By: xemul on Tue, 06 March 2007 14:57
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: xemul on Wed, 14 March 2007 15:43
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Cedric Le Goater on Wed, 14 March 2007 15:37
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Sun, 11 March 2007 19:14
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: dev on Mon, 12 March 2007 16:23
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Dave Hansen on Mon, 12 March 2007 16:50
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: dev on Mon, 12 March 2007 17:07
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Herbert Poetzl on Mon, 12 March 2007 23:54
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Tue, 13 March 2007 09:58
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Tue, 13 March 2007 10:25
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Ethan Solomita on Wed, 28 March 2007 20:15
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Dave Hansen on Mon, 12 March 2007 17:33
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Tue, 13 March 2007 09:43
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: ebiederm on Tue, 13 March 2007 16:01
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Wed, 14 March 2007 03:51
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Balbir Singh on Wed, 14 March 2007 06:42
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Wed, 14 March 2007 06:57
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Balbir Singh on Wed, 14 March 2007 07:48
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Vaidyanathan Srinivas on Wed, 14 March 2007 13:25
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Wed, 14 March 2007 13:49
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: dev on Wed, 14 March 2007 16:16
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Nick Piggin on Thu, 15 March 2007 05:01
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Vaidyanathan Srinivas on Wed, 14 March 2007 14:43
		Re: [RFC][PATCH 4/7] RSS accounting hooks over the code By: Balbir Singh on Thu, 15 March 2007 05:44
		[RFC][PATCH 5/7] Per-container OOM killer and page reclamation By: xemul on Tue, 06 March 2007 15:01
		Re: [RFC][PATCH 5/7] Per-container OOM killer and page reclamation By: Balbir Singh on Fri, 09 March 2007 21:21
		Re: [RFC][PATCH 5/7] Per-container OOM killer and page reclamation By: xemul on Sun, 11 March 2007 08:39
		[RFC][PATCH 6/7] Account for the number of tasks within container By: xemul on Tue, 06 March 2007 15:02
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: Paul Menage on Wed, 07 March 2007 02:00
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: xemul on Wed, 07 March 2007 07:10
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: Paul Menage on Thu, 08 March 2007 13:49
		Re: [RFC][PATCH 6/7] Account for the number of tasks within container By: xemul on Sun, 11 March 2007 08:34
		[RFC][PATCH 7/7] Account for the number of files opened within container By: xemul on Tue, 06 March 2007 15:05
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: Paul Menage on Wed, 07 March 2007 02:02
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: xemul on Wed, 07 March 2007 07:27
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: Balbir Singh on Wed, 07 March 2007 06:52
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: xemul on Wed, 07 March 2007 07:30
		Re: [RFC][PATCH 0/7] Resource controllers based on process containers By: dev on Wed, 07 March 2007 09:30

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