Hi, this continues the discussion from [1]. Reasons to remove SLOB are outlined there and no-one has objected so far. The last patch of this series therefore deprecates CONFIG_SLOB and updates all the defconfigs using CONFIG_SLOB=y in the tree. There is a k210 board with 8MB RAM where switching to SLUB caused issues [2] and the lkp bot wasn't also happy about code bloat [3]. To address both, this series introduces CONFIG_SLUB_TINY to perform some rather low-hanging fruit modifications to SLUB to reduce its memory overhead. This seems to have been successful at least in the k210 case [4]. I consider this as an acceptable tradeoff for getting rid of SLOB. The series is also available in git: https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/log/?h=slub-tiny-v1r2 [1] https://lore.kernel.org/all/b35c3f82-f67b-2103-7d82-7a7ba7521439@xxxxxxx/ [2] https://lore.kernel.org/all/a5bba3ca-da19-293c-c01b-a28291533466@xxxxxxxxxxxxxxxxxx/ [3] https://lore.kernel.org/all/Y25E9cJbhDAKi1vd@99bb1221be19/ [4] https://lore.kernel.org/all/6a1883c4-4c3f-545a-90e8-2cd805bcf4ae@xxxxxxxxxxxxxxxxxx/ Vlastimil Babka (12): mm, slab: ignore hardened usercopy parameters when disabled mm, slub: add CONFIG_SLUB_TINY mm, slub: disable SYSFS support with CONFIG_SLUB_TINY mm, slub: retain no free slabs on partial list with CONFIG_SLUB_TINY mm, slub: lower the default slub_max_order with CONFIG_SLUB_TINY mm, slub: don't create kmalloc-rcl caches with CONFIG_SLUB_TINY mm, slab: ignore SLAB_RECLAIM_ACCOUNT with CONFIG_SLUB_TINY mm, slub: refactor free debug processing mm, slub: split out allocations from pre/post hooks mm, slub: remove percpu slabs with CONFIG_SLUB_TINY mm, slub: don't aggressively inline with CONFIG_SLUB_TINY mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED arch/arm/configs/clps711x_defconfig | 3 +- arch/arm/configs/collie_defconfig | 3 +- arch/arm/configs/multi_v4t_defconfig | 3 +- arch/arm/configs/omap1_defconfig | 3 +- arch/arm/configs/pxa_defconfig | 3 +- arch/arm/configs/tct_hammer_defconfig | 3 +- arch/arm/configs/xcep_defconfig | 3 +- arch/openrisc/configs/or1ksim_defconfig | 3 +- arch/openrisc/configs/simple_smp_defconfig | 3 +- arch/riscv/configs/nommu_k210_defconfig | 3 +- .../riscv/configs/nommu_k210_sdcard_defconfig | 3 +- arch/riscv/configs/nommu_virt_defconfig | 3 +- arch/sh/configs/rsk7201_defconfig | 3 +- arch/sh/configs/rsk7203_defconfig | 3 +- arch/sh/configs/se7206_defconfig | 3 +- arch/sh/configs/shmin_defconfig | 3 +- arch/sh/configs/shx3_defconfig | 3 +- include/linux/slab.h | 8 + include/linux/slub_def.h | 6 +- kernel/configs/tiny.config | 5 +- mm/Kconfig | 38 +- mm/Kconfig.debug | 2 +- mm/slab_common.c | 16 +- mm/slub.c | 415 ++++++++++++------ 24 files changed, 377 insertions(+), 164 deletions(-) -- 2.38.1
