[GIT PULL] slab updates for 7.3

Hi Linus,

please pull the latest slab updates from:

  git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-7.3

There's a semantic conflict with changes in char-misc that will break Rust
build due to a change of kvfree_call_rcu() parameter type. In linux-next this
was solved by this fixup applied as part of the merge commit of whichever of the
trees is merged later:

https://lore.kernel.org/all/[email protected]/

Thanks,
Vlastimil

======================================

- Addition of kfree_rcu_nolock() that can be used from contexts where spinning
  on a lock might be unsafe, such as a BPF program attached to an arbitrary
  function, or in NMI context. This complements the existing kfree_nolock()
  support. (Harry Yoo)

- Runtime instead of compile-time slabobj_ext sizing. Avoids wasting memory
  when memory allocation profiling is compiled but not enabled, with initial
  partial support to also avoid wasting memory for objcg pointers when those
  are not needed, while profiling is enabled. (Vlastimil Babka)

- Various non-urgent fixes, cleanups and optimizations. (Hao Li, Hongling Zeng,
  Li RongQing, Li Xiasong, Seongjun Hong, Shengming Hu)

----------------------------------------------------------------
The following changes since commit 5ff172f6c94d282d83cb88bdfec5f647ad9c6105:

  slab: silence sparse warning with type-based partitioning (2026-07-21 11:28:21 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-7.3

for you to fetch changes up to 564ed40708ebc60a78f280944799cbe8e3401816:

  Merge branch 'slab/for-7.3/kfree_rcu_nolock' into slab/for-next (2026-08-24 15:01:27 +0200)

----------------------------------------------------------------
slab changes for 7.3

----------------------------------------------------------------
Hao Li (1):
      mm/slub: deduplicate NUMA policy calculation in allocation paths

Harry Yoo (Oracle) (8):
      mm/slab, slub_kunit: register kprobe to trigger _nolock APIs
      mm/slab: handle the !allow_spin case in kfree_rcu_sheaf()
      mm/slab: use call_rcu() in unknown context if irqs are enabled
      mm/slab: extend deferred free mechanism to handle rcu sheaves
      mm/slab: allow kfree_rcu_sheaf() on PREEMPT_RT
      mm/slab: introduce struct kvfree_rcu_head for kvfree_rcu batching
      mm/slab: introduce kfree_rcu_nolock()
      slub_kunit: extend the test for kfree_rcu_nolock()

Hongling Zeng (1):
      mm/slub: add comment explaining intentional kobject handling in sysfs_slab_add

Li RongQing (1):
      mm/mempool: Untangle CONFIG_SLUB_DEBUG_ON abuse and switch to static key

Li Xiasong (1):
      mm/slub: fix missing debugfs entries for caches created before sysfs init

Seongjun Hong (2):
      slab: remove unused SL_CPU slab_stat_type
      docs: ABI: sysfs-kernel-slab: mark cpu_partial attributes deprecated

Shengming Hu (1):
      mm/slub: prevent pfmemalloc objects from entering the barn

Vlastimil Babka (SUSE) (18):
      mm/slab: extract __free_to_pcs_batch() from free_to_pcs_bulk()
      mm/slab: simplify freeing remote objects in free_to_pcs_bulk()
      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: stop exporting kvfree_rcu_barrier[_on_cache]()
      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
      Merge branch 'slab/for-7.3/objext_split' into slab/for-next
      Merge branch 'slab/for-7.3/kfree_rcu_nolock' into slab/for-next

 Documentation/ABI/testing/sysfs-kernel-slab     |  18 +-
 Documentation/admin-guide/kernel-parameters.txt |   5 +
 Documentation/mm/allocation-profiling.rst       |   7 +
 include/linux/memcontrol.h                      |  13 -
 include/linux/rcupdate.h                        |  32 +-
 include/linux/slab.h                            |  19 +-
 include/linux/types.h                           |  10 +
 include/trace/events/rcu.h                      |   2 +-
 lib/tests/slub_kunit.c                          | 190 +++++--
 mm/kfence/core.c                                |  12 -
 mm/kfence/kfence.h                              |   3 -
 mm/kfence/kfence_test.c                         |   2 +-
 mm/memcontrol.c                                 |  37 +-
 mm/mempool.c                                    |  35 +-
 mm/slab.h                                       | 245 +++++++--
 mm/slab_common.c                                | 111 +++-
 mm/slub.c                                       | 660 ++++++++++++++----------
 17 files changed, 940 insertions(+), 461 deletions(-)