On Fri, Mar 19, 2021 at 03:22:33PM -0400, Rafael Aquini wrote:
> This is a minor addition to the allocator setup options to provide
> a simple way to on demand enable back cache merging for builds
> that by default run with CONFIG_SLAB_MERGE_DEFAULT not set.
>
> Signed-off-by: Rafael Aquini <aqu...@redhat.com>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
> mm/slab_common.c | 8 ++++++++
> 2 files changed, 15 insertions(+)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt
> b/Documentation/admin-guide/kernel-parameters.txt
> index 04545725f187..06519eecbfec 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -4877,6 +4877,10 @@
>
> slram= [HW,MTD]
>
> + slab_merge [MM]
> + Enable merging of slabs with similar size when the
> + kernel is built without CONFIG_SLAB_MERGE_DEFAULT.
> +
> slab_nomerge [MM]
> Disable merging of slabs with similar size. May be
> necessary if there is some reason to distinguish
> @@ -4924,6 +4928,9 @@
> lower than slub_max_order.
> For more information see Documentation/vm/slub.rst.
>
> + slub_merge [MM, SLUB]
> + Same with slab_merge.
> +
> slub_nomerge [MM, SLUB]
> Same with slab_nomerge. This is supported for legacy.
> See slab_nomerge for more information.
> diff --git a/mm/slab_common.c b/mm/slab_common.c
> index 88e833986332..30db72269036 100644
> --- a/mm/slab_common.c
> +++ b/mm/slab_common.c
> @@ -71,11 +71,19 @@ static int __init setup_slab_nomerge(char *str)
> return 1;
> }
>
> +static int __init setup_slab_merge(char *str)
> +{
> + slab_nomerge = false;
> + return 1;
> +}
> +
> #ifdef CONFIG_SLUB
> __setup_param("slub_nomerge", slub_nomerge, setup_slab_nomerge, 0);
> +__setup_param("slub_merge", slub_merge, setup_slab_merge, 0);
> #endif
>
> __setup("slab_nomerge", setup_slab_nomerge);
> +__setup("slab_merge", setup_slab_nomerge);
DOH! I missed the typo here ^^
Sorry.
