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    Subject[PATCH 00/12] Introduce CONFIG_SLUB_TINY and deprecate SLOB
    Date
    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@suse.cz/
    [2] https://lore.kernel.org/all/a5bba3ca-da19-293c-c01b-a28291533466@opensource.wdc.com/
    [3] https://lore.kernel.org/all/Y25E9cJbhDAKi1vd@99bb1221be19/
    [4] https://lore.kernel.org/all/6a1883c4-4c3f-545a-90e8-2cd805bcf4ae@opensource.wdc.com/

    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

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