[PATCH net-next v5 0/7] net: skb: isolate skb data area allocations into a separate bucket

[Kees Cook <kees@kernel.org>]

Hi!

This gets the buckets able to handle memcg (GFP_KERNEL_ACCOUNT) with
isolation (since it's common due to AF_UNIX), and GFP_DMA with fall back
(since it's rare). It gave me an excuse to build out bucket kunit tests
too, and that (and LLM review) found a couple other issues that needed
fixing too.

The bulk of this is mm/slab, but the final patch is netdev, which Paolo
acked in v4, so I'm hoping this whole series can go via slab?

Thanks!

-Kees

 v5:
 - 2/7: kmem_buckets_create() and kmem_buckets_create_types() take an
   alignment, where kmem_cache_create() has it; 0 keeps v4's behaviour,
   the alignment of the kmalloc cache being mirrored. All callers pass 0.
   New subject: "mm/slab: Let kmem_buckets_create() take an alignment"
   (Harry)
 - 4/7: test that an explicit alignment is honored.
 - 5/7: export mem_cgroup_kmem_disabled() for KUnit only, fixing a
   modular build of slub_kunit (Harry).
 - 6/7: commit log shows the per-set cost of indexing rows by
   kmalloc_cache_type; test that an explicit alignment reaches the
   accounted row too.
 - 7/7: pass the new alignment argument.
 - Collected tags on 1/7 (Harry, Pedro, Hao) and 7/7 (Paolo).
 - v4..v5 diff: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/diff/?id=dev/v7.3-rc2/skb-buckets/v5&id2=dev/v7.3-rc2/skb-buckets/v4
 v4: https://lore.kernel.org/all/20260921075811.too.775-kees@kernel.org/
 v3: https://lore.kernel.org/all/20260702170728.168755-1-pfalcato@suse.de/


Kees Cook (6):
  mm/slab: Mark the kmem_buckets_create() context as a Context: section
  mm/slab: Let kmem_buckets_create() take an alignment
  mm/slab: Add kmem_buckets_destroy()
  mm/slab: Add tests for the existing kmem_buckets behaviour
  mm/slab: Provide kmalloc type fallback for bucket allocations
  mm/slab: Let a bucket set handle __GFP_ACCOUNT

Pedro Falcato (1):
  net: skb: isolate skb data area allocations into a separate bucket

 include/linux/slab.h   |  66 ++++++-
 mm/slab.h              |  44 ++++-
 ipc/msgutil.c          |   2 +-
 lib/tests/slub_kunit.c | 397 +++++++++++++++++++++++++++++++++++++++++
 mm/memcontrol.c        |   2 +
 mm/slab_common.c       | 173 +++++++++++++++---
 mm/util.c              |   2 +-
 net/core/skbuff.c      |  11 +-
 8 files changed, 663 insertions(+), 34 deletions(-)

-- 
2.34.1