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Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() [message #5771 is a reply to message #5740]

Wed, 30 August 2006 10:51

Roman Zippel
Messages: 4
Registered: August 2006

Junior Member

Hi,

On Wed, 30 Aug 2006, Oleg Nesterov wrote:

> > Why does this need protection against interrupts?
>
> uidhash_lock can be taken from irq context. For example, delayed_put_task_struct()
> does __put_task_struct()->free_uid().

AFAICT it's called via rcu, does that mean anything released via rcu has
to be protected against interrupts?

bye, Roman

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[Message index]

		[PATCH] BC: resource beancounters (v3) By: dev on Tue, 29 August 2006 14:31
		[PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: dev on Tue, 29 August 2006 14:47
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Roman Zippel on Wed, 30 August 2006 09:59
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Oleg Nesterov on Wed, 30 August 2006 12:01
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Roman Zippel on Wed, 30 August 2006 10:51
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Oleg Nesterov on Wed, 30 August 2006 11:27
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Roman Zippel on Wed, 30 August 2006 11:54
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Dipankar Sarma on Wed, 30 August 2006 16:58
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: Roman Zippel on Wed, 30 August 2006 17:25
		Re: [PATCH 1/7] introduce atomic_dec_and_lock_irqsave() By: paulmck on Thu, 31 August 2006 22:58
		[PATCH 2/7] BC: kconfig By: dev on Tue, 29 August 2006 14:48
		Re: [PATCH 2/7] BC: kconfig By: rdunlap on Wed, 30 August 2006 04:02
		[PATCH 3/7] BC: beancounters core (API) By: dev on Tue, 29 August 2006 14:50
		Re: [ckrm-tech] [PATCH 3/7] BC: beancounters core (API) By: Chandra Seetharaman on Wed, 30 August 2006 18:58
		Re: [ckrm-tech] [PATCH 3/7] BC: beancounters core (API) By: Andrew Morton on Wed, 30 August 2006 19:47
		[PATCH 4/7] BC: context inheriting and changing By: dev on Tue, 29 August 2006 14:51
		Re: [ckrm-tech] [PATCH 4/7] BC: context inheriting and changing By: Chandra Seetharaman on Wed, 30 August 2006 19:11
		[PATCH 5/7] BC: user interface (syscalls) By: dev on Tue, 29 August 2006 14:52
		Re: [ckrm-tech] [PATCH 5/7] BC: user interface (syscalls) By: Chandra Seetharaman on Wed, 30 August 2006 19:15
		[PATCH 6/7] BC: kernel memory (core) By: dev on Tue, 29 August 2006 14:55
		Re: [PATCH 6/7] BC: kernel memory (core) By: Balbir Singh on Tue, 29 August 2006 18:41
		Re: [PATCH 6/7] BC: kernel memory (core) By: dev on Mon, 04 September 2006 12:19
		Re: [PATCH 6/7] BC: kernel memory (core) By: Balbir Singh on Mon, 04 September 2006 15:45
		Re: [ckrm-tech] [PATCH 6/7] BC: kernel memory (core) By: Dave Hansen on Tue, 29 August 2006 20:29
		Re: [ckrm-tech] [PATCH 6/7] BC: kernel memory (core) By: dev on Mon, 04 September 2006 12:20
		Re: [ckrm-tech] [PATCH 6/7] BC: kernel memory (core) By: Dave Hansen on Tue, 05 September 2006 16:21
		Re: [ckrm-tech] [PATCH 6/7] BC: kernel memory (core) By: Chandra Seetharaman on Wed, 30 August 2006 19:25
		[PATCH 7/7] BC: kernel memory (marks) By: dev on Tue, 29 August 2006 14:56

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