On Mon, Nov 21, 2022 at 06:11:50PM +0100, Vlastimil Babka wrote: > 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(-) For the series Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> -- Sincerely yours, Mike.
