[PATCH 00/12] Introduce CONFIG_SLUB_TINY and deprecate SLOB
Mike Rapoport
rppt at kernel.org
Thu Nov 24 12:30:41 PST 2022
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@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(-)
For the series
Acked-by: Mike Rapoport <rppt at linux.ibm.com>
--
Sincerely yours,
Mike.
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