On Tue, 14 Jan 2020 09:16:17 +0000 Li Xinhai <lixinhai.lxh@xxxxxxxxx> wrote:
> Checking hstate at early phase when isolating page, instead of during
> unmap and move phase, to avoid useless isolation.
>
> ...
>
> --- a/include/linux/mempolicy.h
> +++ b/include/linux/mempolicy.h
> @@ -185,10 +185,9 @@ static inline bool vma_migratable(struct vm_area_struct *vma)
> if (vma_is_dax(vma))
> return false;
>
> -#ifndef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
> - if (vma->vm_flags & VM_HUGETLB)
> + if (is_vm_hugetlb_page(vma) &&
> + !hugepage_migration_supported(hstate_vma(vma)))
> return false;
> -#endif
>
> /*
> * Migration allocates pages in the highest zone. If we cannot
x86_64 allmodconfig:
In file included from ./include/linux/hugetlb.h:26:0,
from arch/x86/mm/fault.c:15:
./include/linux/mempolicy.h: In function vma_migratable:
./include/linux/mempolicy.h:190:4: error: implicit declaration of function hugepage_migration_supported; did you mean thp_migration_supported? [-Werror=implicit-function-declaration]
!hugepage_migration_supported(hstate_vma(vma)))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
the obvious fix didn't work.
