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Re: [PATCH v5 2/2] decrement static keys on real destroy time [message #46406 is a reply to message #46399]

Thu, 17 May 2012 17:02

akpm
Messages: 224
Registered: March 2007

Senior Member

On Thu, 17 May 2012 13:52:13 +0400 Glauber Costa <glommer@parallels.com> wrote:

> Andrew is right. It seems we will need that mutex after all. Just this
> is not a race, and neither something that should belong in the
> static_branch interface.

Well, a mutex is one way. Or you could do something like

if (!test_and_set_bit(CGPROTO_ACTIVATED, &cg_proto->flags))
static_key_slow_inc(&memcg_socket_limit_enabled);

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[Message index]

		[PATCH v5 0/2] fix static_key disabling problem in memcg By: Glauber Costa on Fri, 11 May 2012 20:11
		[PATCH v5 1/2] Always free struct memcg through schedule_work() By: Glauber Costa on Fri, 11 May 2012 20:11
		Re: [PATCH v5 1/2] Always free struct memcg through schedule_work() By: KAMEZAWA Hiroyuki on Mon, 14 May 2012 00:56
		[PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Fri, 11 May 2012 20:11
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: KAMEZAWA Hiroyuki on Mon, 14 May 2012 00:59
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Wed, 16 May 2012 06:03
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Wed, 16 May 2012 07:04
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: KAMEZAWA Hiroyuki on Wed, 16 May 2012 08:28
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Wed, 16 May 2012 08:30
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Wed, 16 May 2012 08:37
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Li Zefan on Mon, 14 May 2012 01:38
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Wed, 16 May 2012 07:03
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: akpm on Wed, 16 May 2012 20:57
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Tejun Heo on Mon, 14 May 2012 18:12
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: akpm on Wed, 16 May 2012 21:06
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Thu, 17 May 2012 03:06
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: akpm on Thu, 17 May 2012 05:37
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Thu, 17 May 2012 09:52
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: KAMEZAWA Hiroyuki on Thu, 17 May 2012 10:18
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Thu, 17 May 2012 10:22
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: KAMEZAWA Hiroyuki on Thu, 17 May 2012 10:27
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Tejun Heo on Thu, 17 May 2012 15:19
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: akpm on Thu, 17 May 2012 17:02
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: akpm on Wed, 16 May 2012 21:13
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: KAMEZAWA Hiroyuki on Thu, 17 May 2012 00:07
		Re: [PATCH v5 2/2] decrement static keys on real destroy time By: Glauber Costa on Thu, 17 May 2012 03:09

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