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Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree [message #46330 is a reply to message #46307]

Fri, 11 May 2012 17:53

Christoph Lameter
Messages: 123
Registered: September 2006

Senior Member

On Fri, 11 May 2012, Glauber Costa wrote:

> struct page already have this information. If we start chaining
> caches, this information will always be more trustworthy than
> whatever is passed into the function

Other allocators may not have that information and this patch may
cause bugs to go unnoticed if the caller specifies the wrong slab cache.

Adding a VM_BUG_ON may be useful to make sure that kmem_cache_free is
always passed the correct slab cache.

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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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