Re: [PATCH powerpc 2/2] kfree the cache name of pgtable cache if SLUB is used

On Wed, 2012-07-04 at 16:40 +0400, Glauber Costa wrote:

On 07/04/2012 01:00 PM, Li Zhong wrote:

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On Tue, 2012-07-03 at 15:36 -0500, Christoph Lameter wrote:

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Looking through the emails it seems that there is an issue with alias
strings. 

To be more precise, there seems no big issue currently. I just wanted to
make following usage of kmem_cache_create (SLUB) possible:

	name = some string kmalloced
	kmem_cache_create(name, ...)
	kfree(name);

Out of curiosity: Why?
This is not (currently) possible with the other allocators (may change
with christoph's unification patches), so you would be making your code
slub-dependent.

For slub itself, I think it's not good that: in some cases, the name
string could be kfreed ( if it was kmalloced ) immediately after calling
the cache create; in some other case, the name string needs to be kept
valid until some init calls finished. 

I agree with you that it would make the code slub-dependent, so I'm now
working on the consistency of the other allocators regarding this name
string duplicating thing.