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Re: [PATCH 0/9] Containers (V9): Generic Process Containers [message #12471 is a reply to message #12470]

Mon, 30 April 2007 17:09

Paul Menage
Messages: 642
Registered: September 2006

Senior Member

On 4/30/07, Srivatsa Vaddagiri <vatsa@in.ibm.com> wrote:
> On Sun, Apr 29, 2007 at 02:37:21AM -0700, Paul Jackson wrote:
> > It builds and boots and mounts the cpuset file system ok.
> > But trying to write the 'mems' file hangs the system hard.
>
> Basically we are attempting a read_lock(&tasklist_lock) in
> container_task_count() after taking write_lock_irq(&tasklist_lock) in
> update_nodemask()!

Paul, is there any reason why we need to do a write_lock() on
tasklist_lock if we're just trying to block fork, or is it just
historical accident? Wouldn't it be fine to do a read_lock()?

Paul

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[Message index]

		[PATCH 0/9] Containers (V9): Generic Process Containers By: Paul Menage on Fri, 27 April 2007 10:46
		[PATCH 9/9] Containers (V9): Simple debug info subsystem By: Paul Menage on Fri, 27 April 2007 10:46
		[PATCH 3/9] Containers (V9): Add tasks file interface By: Paul Menage on Fri, 27 April 2007 10:46
		Re: [PATCH 3/9] Containers (V9): Add tasks file interface By: Balbir Singh on Tue, 01 May 2007 18:12
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Paul Menage on Tue, 01 May 2007 20:37
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Srivatsa Vaddagiri on Wed, 02 May 2007 03:17
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Paul Menage on Wed, 02 May 2007 03:25
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Srivatsa Vaddagiri on Wed, 02 May 2007 03:38
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Balbir Singh on Tue, 08 May 2007 14:51
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Paul Menage on Thu, 10 May 2007 21:21
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Balbir Singh on Fri, 11 May 2007 02:31
		Re: [ckrm-tech] [PATCH 3/9] Containers (V9): Add tasks file interface By: Balbir Singh on Wed, 02 May 2007 03:58
		[PATCH 1/9] Containers (V9): Basic container framework By: Paul Menage on Fri, 27 April 2007 10:46
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Paul Jackson on Sun, 29 April 2007 03:12
		Re: [PATCH 1/9] Containers (V9): Basic container framework By: Paul Menage on Tue, 01 May 2007 17:46
		Re: [PATCH 1/9] Containers (V9): Basic container framework By: Balbir Singh on Tue, 01 May 2007 17:40
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Paul Jackson on Tue, 01 May 2007 18:40
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Balbir Singh on Wed, 02 May 2007 03:44
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Paul Jackson on Wed, 02 May 2007 06:12
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Balbir Singh on Thu, 10 May 2007 04:09
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Paul Jackson on Thu, 10 May 2007 04:47
		Re: [ckrm-tech] [PATCH 1/9] Containers (V9): Basic container framework By: Balbir Singh on Thu, 10 May 2007 04:49
		[PATCH 7/9] Containers (V9): Make cpusets a client of containers By: Paul Menage on Fri, 27 April 2007 10:46
		[PATCH 4/9] Containers (V9): Add fork/exit hooks By: Paul Menage on Fri, 27 April 2007 10:46
		[PATCH 8/9] Containers (V9): Share css_group arrays between tasks with same container memberships By: Paul Menage on Fri, 27 April 2007 10:46
		[PATCH 6/9] Containers (V9): Add procfs interface By: Paul Menage on Fri, 27 April 2007 10:46
		[PATCH 2/9] Containers (V9): Example CPU accounting subsystem By: Paul Menage on Fri, 27 April 2007 10:46
		Re: [PATCH 2/9] Containers (V9): Example CPU accounting subsystem By: Balbir Singh on Tue, 01 May 2007 17:52
		Re: [PATCH 0/9] Containers (V9): Generic Process Containers By: Paul Jackson on Sun, 29 April 2007 01:47
		Re: [PATCH 0/9] Containers (V9): Generic Process Containers By: Paul Jackson on Sun, 29 April 2007 09:37
		Re: [PATCH 0/9] Containers (V9): Generic Process Containers By: Srivatsa Vaddagiri on Mon, 30 April 2007 17:04
		Re: [PATCH 0/9] Containers (V9): Generic Process Containers By: Paul Menage on Mon, 30 April 2007 17:09
		Re: [PATCH 0/9] Containers (V9): Generic Process Containers By: Srivatsa Vaddagiri on Mon, 30 April 2007 17:59
		Re: [PATCH 0/9] Containers (V9): Generic Process Containers By: Christoph Hellwig on Mon, 30 April 2007 17:23
		Re: [ckrm-tech] [PATCH 0/9] Containers (V9): Generic Process Containers By: Srivatsa Vaddagiri on Mon, 30 April 2007 18:09

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