This series builds on the validation races fix posted previously [1] that became patch 2 here and contains all the details in its description. Thanks to Hyeonggon Yoo's observation, patch 3 removes more slab_lock() usage that became unnecessary after patch 2. This made it possible to further simplify locking code in patches 4 and 5. Since those are related to PREEMPT_RT, I'm CCing relevant people on this series. Changes since v1 [2]: - add acks/reviews from Hyeonggon and David - minor fixes to patch 2 as reported by Hyeonggon - patch 5 reworked to rely on disabled preemption by bit_spin_lock() which should be sufficient without disabled interrupts on RT git version: https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=slub-validate-fix-v2r2 I plan to add this series to slab.git for-next in few days. [1] https://lore.kernel.org/all/20220809140043.9903-1-vbabka@xxxxxxx/ [2] https://lore.kernel.org/all/20220812091426.18418-1-vbabka@xxxxxxx/ Vlastimil Babka (5): mm/slub: move free_debug_processing() further mm/slub: restrict sysfs validation to debug caches and make it safe mm/slub: remove slab_lock() usage for debug operations mm/slub: convert object_map_lock to non-raw spinlock mm/slub: simplify __cmpxchg_double_slab() and slab_[un]lock() mm/slub.c | 417 ++++++++++++++++++++++++++++++++---------------------- 1 file changed, 251 insertions(+), 166 deletions(-) -- 2.37.2
