Re: [PATCH v3 2/2] mm/slub: refactor deactivate_slab()

[Roman Gushchin]

On Mon, Mar 07, 2022 at 07:40:56AM +0000, Hyeonggon Yoo wrote:
> Simplify deactivate_slab() by unlocking n->list_lock and retrying
> cmpxchg_double() when cmpxchg_double() fails, and perform
> add_{partial,full} only when it succeed.
> 
> Releasing and taking n->list_lock again here is not harmful as SLUB
> avoids deactivating slabs as much as possible.
> 
> [ vbabka@xxxxxxx: perform add_{partial,full} when cmpxchg_double()
>   succeed.
> 
>   count deactivating full slabs even if debugging flag is not set. ]
> 
> Signed-off-by: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>

Reviewed-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>

Thanks!