Re: [PATCH] mm/slub: serve slabobj_ext array from a strictly larger kmalloc cache

[Harry Yoo]

On 7/1/26 1:30 PM, Harry Yoo wrote:
> We can do that in pre-7.2 kernels, by teaching kmalloc_type() and
> kmalloc_slab() select the new KMALLOC_TYPE based on __GFP_NO_OBJ_EXT?
> 
> e.g.) Select the new KMALLOC_TYPE when KMALLOC_NOT_NORMAL_BITS is not
> set AND __GFP_NO_OBJ_EXT is set.

Uh, this is bit subtle though.

In some cases  KMALLOC_DMA == KMALLOC_NORMAL,
KMALLOC_CGROUP == KMALLOC_NORMAL,
or KMALLOC_RECLAIM == KMALLOC_NORMAL.

Just checking KMALLOC_NOT_NORMAL_BITS is misleading.

> This doesn't require kmem_buckets and should be much simpler.

-- 
Cheers,
Harry / Hyeonggon

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