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Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree [message #46333 is a reply to message #46332]

Fri, 11 May 2012 18:06

Christoph Lameter
Messages: 123
Registered: September 2006

Senior Member

On Fri, 11 May 2012, Glauber Costa wrote:

> > Adding a VM_BUG_ON may be useful to make sure that kmem_cache_free is
> > always passed the correct slab cache.
>
> Well, problem is , it isn't always passed the "correct" slab cache.
> At least not after this series, since we'll have child caches associated with
> the main cache.
>
> So we'll pass, for instance, kmem_cache_free(dentry_cache...), but will in
> fact free from the memcg copy of the dentry cache.

Urg. But then please only do this for the MEMCG case and add a fat big
warning in kmem_cache_free.

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[Message index]

		[PATCH v2 00/29] kmem limitation for memcg By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 03/29] memcg: Always free struct memcg through schedule_work() By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 07/29] memcg: Reclaim when more than one page needed. By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 09/29] memcg: change defines to an enum By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 01/29] slab: dup name string By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 01/29] slab: dup name string By: David Rientjes on Tue, 15 May 2012 22:04
		Re: [PATCH v2 01/29] slab: dup name string By: Glauber Costa on Wed, 16 May 2012 06:12
		[PATCH v2 10/29] res_counter: don't force return value checking in res_counter_charge_nofail By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 02/29] slub: fix slab_state for slub By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 02/29] slub: fix slab_state for slub By: Christoph Lameter on Fri, 11 May 2012 17:51
		Re: [PATCH v2 02/29] slub: fix slab_state for slub By: David Rientjes on Tue, 15 May 2012 21:55
		Re: [PATCH v2 02/29] slub: fix slab_state for slub By: Glauber Costa on Wed, 16 May 2012 06:10
		Re: [PATCH v2 02/29] slub: fix slab_state for slub By: Glauber Costa on Thu, 17 May 2012 10:14
		[PATCH v2 06/29] memcg: Make it possible to use the stock for more than one page. By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 17:53
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 17:57
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 18:06
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 18:11
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 18:17
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 18:20
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 18:32
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 18:42
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 18:56
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 18:58
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 19:09
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 19:11
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Christoph Lameter on Fri, 11 May 2012 19:20
		Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree By: Glauber Costa on Fri, 11 May 2012 19:24
		[PATCH v2 12/29] kmem slab accounting basic infrastructure By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 05/29] slab: rename gfpflags to allocflags By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 05/29] slab: rename gfpflags to allocflags By: Christoph Lameter on Fri, 11 May 2012 17:54
		Re: [PATCH v2 05/29] slab: rename gfpflags to allocflags By: David Rientjes on Tue, 15 May 2012 21:57
		[PATCH v2 11/29] cgroups: ability to stop res charge propagation on bounded ancestor By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 11/29] cgroups: ability to stop res charge propagation on bounded ancestor By: KAMEZAWA Hiroyuki on Tue, 15 May 2012 02:59
		Re: [PATCH v2 11/29] cgroups: ability to stop res charge propagation on bounded ancestor By: Glauber Costa on Wed, 16 May 2012 06:16
		[PATCH v2 08/29] slab: use obj_size field of struct kmem_cache when not debugging By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 13/29] slab/slub: struct memcg_params By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 14/29] slub: consider a memcg parameter in kmem_create_cache By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 15/29] slab: pass memcg parameter to kmem_cache_create By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 16/29] slub: create duplicate cache By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 25/29] memcg: Track all the memcg children of a kmem_cache. By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 17/29] slab: create duplicate cache By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 26/29] memcg: Per-memcg memory.kmem.slabinfo file. By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 18/29] memcg: kmem controller charge/uncharge infrastructure By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 18/29] memcg: kmem controller charge/uncharge infrastructure By: KAMEZAWA Hiroyuki on Tue, 15 May 2012 02:57
		Re: [PATCH v2 18/29] memcg: kmem controller charge/uncharge infrastructure By: Glauber Costa on Wed, 16 May 2012 06:42
		Re: [PATCH v2 18/29] memcg: kmem controller charge/uncharge infrastructure By: KAMEZAWA Hiroyuki on Wed, 16 May 2012 08:18
		Re: [PATCH v2 18/29] memcg: kmem controller charge/uncharge infrastructure By: Glauber Costa on Wed, 16 May 2012 08:25
		Re: [PATCH v2 18/29] memcg: kmem controller charge/uncharge infrastructure By: KAMEZAWA Hiroyuki on Wed, 16 May 2012 09:15
		[PATCH v2 19/29] skip memcg kmem allocations in specified code regions By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 19/29] skip memcg kmem allocations in specified code regions By: KAMEZAWA Hiroyuki on Tue, 15 May 2012 02:46
		Re: [PATCH v2 19/29] skip memcg kmem allocations in specified code regions By: Glauber Costa on Wed, 16 May 2012 06:19
		Re: [PATCH v2 19/29] skip memcg kmem allocations in specified code regions By: KAMEZAWA Hiroyuki on Wed, 16 May 2012 07:55
		[PATCH v2 20/29] slub: charge allocation to a memcg By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 21/29] slab: per-memcg accounting of slab caches By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 22/29] memcg: disable kmem code when not in use. By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 23/29] memcg: destroy memcg caches By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 24/29] memcg/slub: shrink dead caches By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 27/29] slub: create slabinfo file for memcg By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 28/29] slub: track all children of a kmem cache By: Glauber Costa on Fri, 11 May 2012 17:44
		[PATCH v2 29/29] Documentation: add documentation for slab tracker for memcg By: Glauber Costa on Fri, 11 May 2012 17:44
		Re: [PATCH v2 00/29] kmem limitation for memcg By: Glauber Costa on Fri, 11 May 2012 18:05

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