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Merge tag 'slab-for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab updates from Vlastimil Babka:
- SLOB deprecation and SLUB_TINY
The SLOB allocator adds maintenance burden and stands in the way of
API improvements [1]. Deprecate it by renaming the config option (to
make users notice) to CONFIG_SLOB_DEPRECATED with updated help text.
SLUB should be used instead as SLAB will be the next on the removal
list.
Based on reports from a riscv k210 board with 8MB RAM, add a
CONFIG_SLUB_TINY option to minimize SLUB's memory usage at the
expense of scalability. This has resolved the k210 regression [2] so
in case there are no others (that wouldn't be resolvable by further
tweaks to SLUB_TINY) plan is to remove SLOB in a few cycles.
Existing defconfigs with CONFIG_SLOB are converted to
CONFIG_SLUB_TINY.
- kmalloc() slub_debug redzone improvements
A series from Feng Tang that builds on the tracking or requested size
for kmalloc() allocations (for caches with debugging enabled) added
in 6.1, to make redzone checks consider the requested size and not
the rounded up one, in order to catch more subtle buffer overruns.
Includes new slub_kunit test.
- struct slab fields reordering to accomodate larger rcu_head
RCU folks would like to grow rcu_head with debugging options, which
breaks current struct slab layout's assumptions, so reorganize it to
make this possible.
- Miscellaneous improvements/fixes:
- __alloc_size checking compiler workaround (Kees Cook)
- Optimize and cleanup SLUB's sysfs init (Rasmus Villemoes)
- Make SLAB compatible with PROVE_RAW_LOCK_NESTING (Jiri Kosina)
- Correct SLUB's percpu allocation estimates (Baoquan He)
- Re-enableS LUB's run-time failslab sysfs control (Alexander Atanasov)
- Make tools/vm/slabinfo more user friendly when not run as root (Rong Tao)
- Dead code removal in SLUB (Hyeonggon Yoo)
* tag 'slab-for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab: (31 commits)
mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED
mm, slub: don't aggressively inline with CONFIG_SLUB_TINY
mm, slub: remove percpu slabs with CONFIG_SLUB_TINY
mm, slub: split out allocations from pre/post hooks
mm/slub, kunit: Add a test case for kmalloc redzone check
mm/slub, kunit: add SLAB_SKIP_KFENCE flag for cache creation
mm, slub: refactor free debug processing
mm, slab: ignore SLAB_RECLAIM_ACCOUNT with CONFIG_SLUB_TINY
mm, slub: don't create kmalloc-rcl caches with CONFIG_SLUB_TINY
mm, slub: lower the default slub_max_order with CONFIG_SLUB_TINY
mm, slub: retain no free slabs on partial list with CONFIG_SLUB_TINY
mm, slub: disable SYSFS support with CONFIG_SLUB_TINY
mm, slub: add CONFIG_SLUB_TINY
mm, slab: ignore hardened usercopy parameters when disabled
slab: Remove special-casing of const 0 size allocations
slab: Clean up SLOB vs kmalloc() definition
mm/sl[au]b: rearrange struct slab fields to allow larger rcu_head
mm/migrate: make isolate_movable_page() skip slab pages
mm/slab: move and adjust kernel-doc for kmem_cache_alloc
mm/slub, percpu: correct the calculation of early percpu allocation size
...
893660b0e1