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From: "Li Xinhai" <lixinhai.lxh@gmail.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: akpm <akpm@linux-foundation.org>,  mhocko <mhocko@suse.com>,
	 "Mike Kravetz" <mike.kravetz@oracle.com>,
	 yang.shi <yang.shi@linux.alibaba.com>,
	 n-horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: Re: [PATCH 2/2] mm/mempolicy: Skip walking HUGETLB vma if MPOL_MF_STRICT is specified alone
Date: Tue, 14 Jan 2020 22:09:25 +0800
Message-ID: <2020011422092314671410@gmail.com> (raw)
In-Reply-To: <1578993378-10860-2-git-send-email-lixinhai.lxh@gmail.com>

Add cc to
Yang Shi <yang.shi@linux.alibaba.com>
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
, who has been worked on this part

On 2020-01-14 at 17:16 Li Xinhai wrote:
>Checking MPOL_MF_STRICT is ignored for HUGETLB vma according to mbind man
>page:
>
>Notes
>MPOL_MF_STRICT is ignored on huge page mappings.
>
>If MPOL_MF_STRICT is specified alone without any MOVE flag, we should
>indicate, from test_walk, that walking this vma should be skipped even if
>there are misplaced pages.
>
>Signed-off-by: Li Xinhai <lixinhai.lxh@gmail.com>
>Cc: Michal Hocko <mhocko@suse.com>
>Cc: Mike Kravetz <mike.kravetz@oracle.com>
>---
> mm/mempolicy.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
>diff --git a/mm/mempolicy.c b/mm/mempolicy.c
>index 067cf7d..c117b5f 100644
>--- a/mm/mempolicy.c
>+++ b/mm/mempolicy.c
>@@ -656,6 +656,13 @@ static int queue_pages_test_walk(unsigned long start, unsigned long end,
> return 1;
> }
>
>+	/* MPOL_MF_STRICT is ignored for huge page, skip checking
>+	*  misplaced pages
>+	*/
>+	if ((flags & MPOL_MF_VALID) == MPOL_MF_STRICT &&
>+	is_vm_hugetlb_page(vma))
>+	return 1;
>+
> /* queue pages from current vma */
> if (flags & MPOL_MF_VALID)
> return 0;
>--
>1.8.3.1
>

  reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-14  9:16 [PATCH 1/2] mm/mempolicy: Checking hstate for hugetlbfs page in vma_migratable 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 [this message]
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

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