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From: Andrew Morton <akpm@linux-foundation.org>
To: Li Xinhai <lixinhai.lxh@gmail.com>
Cc: linux-mm@kvack.org, Michal Hocko <mhocko@suse.com>,
	Mike Kravetz <mike.kravetz@oracle.com>
Subject: Re: [PATCH 1/2] mm/mempolicy: Checking hstate for hugetlbfs page in vma_migratable
Date: Tue, 14 Jan 2020 17:25:05 -0800
Message-ID: <20200114172505.3e4391c9ae9b949a1a90e78b@linux-foundation.org> (raw)
In-Reply-To: <1578993378-10860-1-git-send-email-lixinhai.lxh@gmail.com>

On Tue, 14 Jan 2020 09:16:17 +0000 Li Xinhai <lixinhai.lxh@gmail.com> 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.


      parent reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14  9:16 Li Xinhai
2020-01-14  9:16 ` [PATCH 2/2] mm/mempolicy: Skip walking HUGETLB vma if MPOL_MF_STRICT is specified alone Li Xinhai
2020-01-14 14:09   ` Li Xinhai
2020-01-14 18:27     ` Yang Shi
2020-01-15  1:07     ` Mike Kravetz
2020-01-15  1:24       ` Yang Shi
2020-01-15  4:28         ` Mike Kravetz
2020-01-15  5:23           ` Yang Shi
2020-01-15  7:36             ` Li Xinhai
2020-01-15 17:16               ` Yang Shi
2020-01-15 21:07       ` Mike Kravetz
2020-01-15 21:30         ` Yang Shi
2020-01-15 21:45           ` Mike Kravetz
2020-01-15 21:59             ` Yang Shi
2020-01-16  8:07               ` HORIGUCHI NAOYA(堀口 直也)
2020-01-16 15:32                 ` Li Xinhai
2020-01-16  7:59         ` Michal Hocko
2020-01-16 19:22           ` Mike Kravetz
2020-01-17  2:32             ` Yang Shi
2020-01-17  2:38             ` Li Xinhai
2020-01-17  7:57               ` Michal Hocko
2020-01-17 12:05                 ` Li Xinhai
2020-01-17 15:20                   ` Michal Hocko
2020-01-17 15:46                     ` Li Xinhai
2020-01-20 12:45                       ` Michal Hocko
2020-01-21 14:15                         ` Li Xinhai
2020-01-21 14:53                           ` Michal Hocko
2020-01-22 13:55                             ` Li Xinhai
2020-01-14 19:12 ` [PATCH 1/2] mm/mempolicy: Checking hstate for hugetlbfs page in vma_migratable Mike Kravetz
2020-01-15  1:25 ` Andrew Morton [this message]

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