On Mon, Aug 22, 2016 at 09:20:02PM +0800, Xie Yisheng wrote:
> Arm64 supports different size of gigantic page which can be seen from:
> commit 084bd29810a5 ("ARM64: mm: HugeTLB support.")
> commit 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit")
>
> So I tried to use this function by adding hugepagesz=1G in kernel
> parameters, with CONFIG_CMA=y. However, when I
> echo xx > \
> /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages
> it failed with the following info:
> -bash: echo: write error: Invalid argument
>
> This is a v3 patchset which make gigantic page can be
> allocated and freed at runtime for arch arm64,
> with CONFIG_CMA=y or other related configs is enabled.
>
> You can see the former discussions at:
> https://lkml.org/lkml/2016/8/18/310
> https://lkml.org/lkml/2016/8/21/410
>
> Xie Yisheng (2):
> mm/hugetlb: Introduce ARCH_HAS_GIGANTIC_PAGE
> arm64 Kconfig: Select gigantic page
>
> arch/arm64/Kconfig | 1 +
> arch/s390/Kconfig | 1 +
> arch/x86/Kconfig | 1 +
> fs/Kconfig | 3 ++++
> mm/hugetlb.c | 2 +-
> 5 files changed, 7 insertions(+), 1 deletion(-)
I assume you plan to merge this via -mm/akpm, given that Catalin has
acked the arm64 part?
Will
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