Re: [PATCH v3 00/13] mm/slab, alloc_tag: reduce obj_ext memory waste

["Vlastimil Babka (SUSE)" <vbabka@kernel.org>]

On 7/27/26 14:53, Vlastimil Babka (SUSE) wrote:
> ---
> Vlastimil Babka (SUSE) (13):
>       mm/slab: skip kfence objects in allocation profiling
>       mm/slab: remove objs_per_slab()
>       mm: move struct slabobj_ext to mm/slab.h
>       mm/slab: make slab_obj_ext() determine object index
>       mm/slab: abstract slabobj_ext.objcg access
>       mm/slab: abstract slabobj_ext.ref access
>       mm/slab: replace slab.stride with obj_exts_in_object
>       mm/slab: change struct slabobj_ext to a union
>       mm/slab: introduce slab_obj_ext_has_codetag()
>       mm/slab: reduce slabobj_ext memory with allocation profiling disabled
>       mm/slab: add cache_ and slab_needs_objcg() helpers
>       mm/slab: stop allocating objcg pointers when unnecessary
>       mm/slab, kfence, memcg: completely remove obj_ext for kfence objects
> 
>  Documentation/mm/allocation-profiling.rst |   7 ++
>  include/linux/memcontrol.h                |  13 --
>  include/linux/slab.h                      |   3 +
>  mm/kfence/core.c                          |  12 --
>  mm/kfence/kfence.h                        |   3 -
>  mm/kfence/kfence_test.c                   |   2 +-
>  mm/memcontrol.c                           |  40 ++++---
>  mm/slab.h                                 | 189 ++++++++++++++++++++++++------
>  mm/slab_common.c                          |  26 +++-
>  mm/slub.c                                 | 184 ++++++++++++++++++-----------
>  10 files changed, 325 insertions(+), 154 deletions(-)
> ---
> base-commit: 5ff172f6c94d282d83cb88bdfec5f647ad9c6105
> change-id: 20260714-b4-objext_split-da82426257d5

Applied (with fixed up 10/13 per sashiko, and 09/13 with a debug check per
Harry). To slab.git slab/for-7.3/objext_split and merged to slab/for-next.