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

[Harry Yoo]

On 6/27/26 2:11 AM, Vlastimil Babka (SUSE) wrote:
> Minimally I'd now want to only do that size bumping when allocation
> profiling is enabled. Ideally that means both configured in and not booted
> with "never".
>
> We probably should have done that already in 280ea9c3154b2.

I think we did already.

obj_exts allocation triggered by memcg has __GFP_ACCOUNT, kmalloc type
is KMALLOC_CGROUP, and so is_kmalloc_normal() should return false?

Perhaps a comment above !is_kmalloc_normal() check would be nice.

> Because AFAIU
> memcg-only obj_exts array don't have this issue
> (or maybe they do have the > [1] issue? Harry?).

memcg-only obj_exts array doesn't have this issue and [1].

Because obj_exts are not accounted and so we can't allocate obj_exts
from KMALLOC_CGROUP.

-- 
Cheers,
Harry / Hyeonggon

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