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Message-Id: <a9e010ca5d299e18d740c7c52290ecb6a014dde6.1660805030.git.baolin.wang@linux.alibaba.com>
Date: Thu, 18 Aug 2022 15:37:44 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: sj@...nel.org, akpm@...ux-foundation.org
Cc: baolin.wang@...ux.alibaba.com, muchun.song@...ux.dev,
mike.kravetz@...cle.com, damon@...ts.linux.dev, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] mm/damon: replace pmd_huge() with pmd_trans_huge() for THP
The pmd_huge() is usually used to indicate if a pmd level hugetlb,
however a pmd mapped huge page can only be THP in damon_mkold_pmd_entry()
or damon_young_pmd_entry(), so replacing pmd_huge() with pmd_trans_huge()
in this case to make code more readable according to the discussion [1].
[1] https://lore.kernel.org/all/098c1480-416d-bca9-cedb-ca495df69b64@linux.alibaba.com/
Signed-off-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
---
- New patch in v2.
---
mm/damon/vaddr.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index 1d16c6c..cc04d46 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -302,14 +302,14 @@ static int damon_mkold_pmd_entry(pmd_t *pmd, unsigned long addr,
pte_t *pte;
spinlock_t *ptl;
- if (pmd_huge(*pmd)) {
+ if (pmd_trans_huge(*pmd)) {
ptl = pmd_lock(walk->mm, pmd);
if (!pmd_present(*pmd)) {
spin_unlock(ptl);
return 0;
}
- if (pmd_huge(*pmd)) {
+ if (pmd_trans_huge(*pmd)) {
damon_pmdp_mkold(pmd, walk->mm, addr);
spin_unlock(ptl);
return 0;
@@ -434,14 +434,14 @@ static int damon_young_pmd_entry(pmd_t *pmd, unsigned long addr,
struct damon_young_walk_private *priv = walk->private;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- if (pmd_huge(*pmd)) {
+ if (pmd_trans_huge(*pmd)) {
ptl = pmd_lock(walk->mm, pmd);
if (!pmd_present(*pmd)) {
spin_unlock(ptl);
return 0;
}
- if (!pmd_huge(*pmd)) {
+ if (!pmd_trans_huge(*pmd)) {
spin_unlock(ptl);
goto regular_page;
}
--
1.8.3.1
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