From: Miaohe Lin <linmiaohe@huawei.com>
To: <akpm@linux-foundation.org>
Cc: <riel@redhat.com>, <kirill.shutemov@linux.intel.com>,
<ebru.akagunduz@gmail.com>, <dan.carpenter@oracle.com>,
<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
<linmiaohe@huawei.com>
Subject: [PATCH 3/5] khugepaged: use helper khugepaged_test_exit() in __khugepaged_enter()
Date: Thu, 4 Mar 2021 07:30:11 -0500 [thread overview]
Message-ID: <20210304123013.23560-4-linmiaohe@huawei.com> (raw)
In-Reply-To: <20210304123013.23560-1-linmiaohe@huawei.com>
Commit 4d45e75a9955 ("mm: remove the now-unnecessary mmget_still_valid()
hack") have made khugepaged_test_exit() suitable for check mm->mm_users
against 0. Use this helper here.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/khugepaged.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 287e7ecf978c..e886a8618c33 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -481,7 +481,7 @@ int __khugepaged_enter(struct mm_struct *mm)
return -ENOMEM;
/* __khugepaged_exit() must not run from under us */
- VM_BUG_ON_MM(atomic_read(&mm->mm_users) == 0, mm);
+ VM_BUG_ON_MM(khugepaged_test_exit(mm), mm);
if (unlikely(test_and_set_bit(MMF_VM_HUGEPAGE, &mm->flags))) {
free_mm_slot(mm_slot);
return 0;
--
2.19.1
next prev parent reply other threads:[~2021-03-04 12:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 12:30 [PATCH 0/5] Cleanup and fixup for khugepaged Miaohe Lin
2021-03-04 12:30 ` [PATCH 1/5] khugepaged: remove unneeded return value of khugepaged_collapse_pte_mapped_thps() Miaohe Lin
2021-03-04 12:30 ` [PATCH 2/5] khugepaged: reuse the smp_wmb() inside __SetPageUptodate() Miaohe Lin
2021-03-04 12:30 ` Miaohe Lin [this message]
2021-03-04 12:30 ` [PATCH 4/5] khugepaged: remove unnecessary mem_cgroup_uncharge() in collapse_[file|huge_page] Miaohe Lin
2021-03-05 17:38 ` Kirill A. Shutemov
2021-03-06 3:18 ` Miaohe Lin
2021-03-04 12:30 ` [PATCH 5/5] khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate() Miaohe Lin
2021-03-05 17:40 ` [PATCH 0/5] Cleanup and fixup for khugepaged Kirill A. Shutemov
2021-03-06 2:44 ` Miaohe Lin
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