From: zhongjiang <zhongjiang@huawei.com>
To: kirill.shutemov@linux.intel.com, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, zhongjiang@huawei.com
Subject: [PATCH] mm: fix account pmd page to the process
Date: Thu, 16 Jun 2016 19:28:54 +0800 [thread overview]
Message-ID: <1466076534-23963-1-git-send-email-zhongjiang@huawei.com> (raw)
From: zhong jiang <zhongjiang@huawei.com>
when a process acquire a pmd table shared by other process, we
increase the account to current process. otherwise, a race result
in other tasks have set the pud entry. so it no need to increase it.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
mm/hugetlb.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 19d0d08..3b025c5 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4189,10 +4189,9 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
if (pud_none(*pud)) {
pud_populate(mm, pud,
(pmd_t *)((unsigned long)spte & PAGE_MASK));
- } else {
+ } else
put_page(virt_to_page(spte));
- mm_inc_nr_pmds(mm);
- }
+
spin_unlock(ptl);
out:
pte = (pte_t *)pmd_alloc(mm, pud, addr);
--
1.8.3.1
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next reply other threads:[~2016-06-16 11:24 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 11:28 zhongjiang [this message]
[not found] <1466163941-12952-1-git-send-email-zhongjiang@huawei.com>
2016-06-17 12:01 ` [PATCH] mm: fix account pmd page to the process zhong jiang
-- strict thread matches above, loose matches on Subject: below --
2016-06-17 11:56 zhongjiang
2016-06-17 12:21 ` Michal Hocko
2016-06-17 13:04 ` zhong jiang
2016-06-16 11:36 zhongjiang
2016-06-16 15:42 ` Michal Hocko
2016-06-16 15:43 ` Michal Hocko
2016-06-16 16:05 ` Mike Kravetz
2016-06-16 16:31 ` Michal Hocko
2016-06-16 16:47 ` Mike Kravetz
2016-06-17 12:25 ` Kirill A. Shutemov
2016-06-17 13:00 ` Michal Hocko
2016-06-17 14:25 ` Kirill A. Shutemov
2016-06-17 15:39 ` Mike Kravetz
2016-06-18 5:07 ` zhong jiang
2016-06-17 11:18 ` zhong jiang
[not found] <1466076175-23444-1-git-send-email-zhongjiang@huawei.com>
2016-06-16 11:30 ` zhong jiang
2016-06-16 11:17 zhongjiang
2016-06-16 11:16 zhongjiang
2016-06-16 11:13 zhongjiang
2016-06-16 7:47 zhongjiang
2016-06-15 14:48 zhongjiang
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