From: Li Xinhai <lixinhai.lxh@gmail.com>
To: linux-mm@kvack.org
Cc: akpm@linux-foundation.org, Michal Hocko <mhocko@suse.com>,
Mike Kravetz <mike.kravetz@oracle.com>
Subject: [PATCH 2/2] mm/mempolicy: Skip walking HUGETLB vma if MPOL_MF_STRICT is specified alone
Date: Tue, 14 Jan 2020 09:16:18 +0000 [thread overview]
Message-ID: <1578993378-10860-2-git-send-email-lixinhai.lxh@gmail.com> (raw)
In-Reply-To: <1578993378-10860-1-git-send-email-lixinhai.lxh@gmail.com>
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
next prev parent reply other threads:[~2020-01-14 9:18 UTC|newest]
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 ` Li Xinhai [this message]
2020-01-14 14:09 ` [PATCH 2/2] mm/mempolicy: Skip walking HUGETLB vma if MPOL_MF_STRICT is specified alone 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
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