Also in git: https://git.kernel.org/vbabka/h/slab-remove-slob-v2r1 Changes since v1: https://lore.kernel.org/all/20230310103210.22372-1-vbabka@xxxxxxx/ - skbuff patch removed from the series as recommended by net folks - fix up comments in fs/proc/page.c (Hyeonggon) - removed an extra line in mm/Makefile that I missed (Mike) - tweak the Documentation wording (Mike) - added Acks/Reviews - thanks! The SLOB allocator was deprecated in 6.2 so I think we can start exposing the complete removal in for-next (already included as of today) and aim at 6.4 if there are no complaints. Besides code cleanup, the main immediate benefit will be allowing kfree() family of function to work on kmem_cache_alloc() objects (Patch 6), which was incompatible with SLOB. This includes kfree_rcu() so I've updated the comment there to remove the mention of potential future addition of kmem_cache_free_rcu() as there should be no need for that now. Otherwise it's all straightforward removal. After this series, 'git grep slob' or 'git grep SLOB' will have relevant hits in non-mm code: - tomoyo - patch submitted and carried there, doesn't need to wait for this series - skbuff - patch to cleanup now-unnecessary #ifdefs will be posted to netdev after this is merged, as requested, to avoid conflicts - ftrace ring_buffer - patch to remove obsolete comment was submitted The rest of 'git grep SLOB' hits are false positives, or intentional (CREDITS, and mm/Kconfig SLUB_TINY description to help those that will happen to migrate later). Vlastimil Babka (6): mm/slob: remove CONFIG_SLOB mm, page_flags: remove PG_slob_free mm, pagemap: remove SLOB and SLQB from comments and documentation mm/slab: remove CONFIG_SLOB code from slab common code mm/slob: remove slob.c mm/slab: document kfree() as allowed for kmem_cache_alloc() objects Documentation/admin-guide/mm/pagemap.rst | 6 +- Documentation/core-api/memory-allocation.rst | 17 +- fs/proc/page.c | 9 +- include/linux/page-flags.h | 4 - include/linux/rcupdate.h | 6 +- include/linux/slab.h | 39 - init/Kconfig | 2 +- kernel/configs/tiny.config | 1 - mm/Kconfig | 22 - mm/Makefile | 2 - mm/slab.h | 61 -- mm/slab_common.c | 7 +- mm/slob.c | 757 ------------------- tools/mm/page-types.c | 6 +- 14 files changed, 27 insertions(+), 912 deletions(-) delete mode 100644 mm/slob.c -- 2.39.2
