diff mbox series

[2/3] mm: hugetlb_vmemmap: cleanup hugetlb_free_vmemmap_enabled*

Message ID 20220404074652.68024-3-songmuchun@bytedance.com (mailing list archive)
State New
Headers show
Series cleanup hugetlb_vmemmap | expand

Commit Message

Muchun Song April 4, 2022, 7:46 a.m. UTC 
The word of "free" is not expressive enough to express the feature of optimizing
vmemmap pages associated with each HugeTLB, rename this keywork to "optimeze".
In this patch , cheanup the static key and hugetlb_free_vmemmap_enabled() to make
code more expressive.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
 arch/arm64/mm/flush.c      |  2 +-
 include/linux/page-flags.h | 12 ++++++------
 mm/hugetlb_vmemmap.c       | 10 +++++-----
 mm/memory_hotplug.c        |  2 +-
 4 files changed, 13 insertions(+), 13 deletions(-)

Comments

Mike Kravetz June 1, 2022, 12:01 a.m. UTC | #1 
On 4/4/22 00:46, Muchun Song wrote:
> The word of "free" is not expressive enough to express the feature of optimizing
> vmemmap pages associated with each HugeTLB, rename this keywork to "optimeze".
> In this patch , cheanup the static key and hugetlb_free_vmemmap_enabled() to make
> code more expressive.

Commit message might look better as:

The keyword "free" is not expressive enough to describe the feature of
optimizing vmemmap pages associated with each HugeTLB page.  Rename the
keyword to "optimize".

Rename the static key and hugetlb_free_vmemmap_enabled() to make the code
more expressive.

> 
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
> ---
>  arch/arm64/mm/flush.c      |  2 +-
>  include/linux/page-flags.h | 12 ++++++------
>  mm/hugetlb_vmemmap.c       | 10 +++++-----
>  mm/memory_hotplug.c        |  2 +-
>  4 files changed, 13 insertions(+), 13 deletions(-)

Code changes look fine,

Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
David Hildenbrand June 1, 2022, 9:29 a.m. UTC | #2 
On 04.04.22 09:46, Muchun Song wrote:
> The word of "free" is not expressive enough to express the feature of optimizing
> vmemmap pages associated with each HugeTLB, rename this keywork to "optimeze".
> In this patch , cheanup the static key and hugetlb_free_vmemmap_enabled() to make
> code more expressive.
> 

Reviewed-by: David Hildenbrand <david@redhat.com>
diff mbox series

Patch

diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 1efd01e10cba..d19a13234a81 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -85,7 +85,7 @@  void flush_dcache_page(struct page *page)
 	 * set since the head vmemmap page frame is reused (more details can
 	 * refer to the comments above page_fixed_fake_head()).
 	 */
-	if (hugetlb_free_vmemmap_enabled() && PageHuge(page))
+	if (hugetlb_optimize_vmemmap_enabled() && PageHuge(page))
 		page = compound_head(page);
 
 	if (test_bit(PG_dcache_clean, &page->flags))
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 9f488668a1d7..557d15ef3dc0 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -201,16 +201,16 @@  enum pageflags {
 
 #ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
 DECLARE_STATIC_KEY_MAYBE(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON,
-			 hugetlb_free_vmemmap_enabled_key);
+			 hugetlb_optimize_vmemmap_key);
 
-static __always_inline bool hugetlb_free_vmemmap_enabled(void)
+static __always_inline bool hugetlb_optimize_vmemmap_enabled(void)
 {
 	return static_branch_maybe(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON,
-				   &hugetlb_free_vmemmap_enabled_key);
+				   &hugetlb_optimize_vmemmap_key);
 }
 
 /*
- * If the feature of freeing some vmemmap pages associated with each HugeTLB
+ * If the feature of optimizing vmemmap pages associated with each HugeTLB
  * page is enabled, the head vmemmap page frame is reused and all of the tail
  * vmemmap addresses map to the head vmemmap page frame (furture details can
  * refer to the figure at the head of the mm/hugetlb_vmemmap.c).  In other
@@ -227,7 +227,7 @@  static __always_inline bool hugetlb_free_vmemmap_enabled(void)
  */
 static __always_inline const struct page *page_fixed_fake_head(const struct page *page)
 {
-	if (!hugetlb_free_vmemmap_enabled())
+	if (!hugetlb_optimize_vmemmap_enabled())
 		return page;
 
 	/*
@@ -256,7 +256,7 @@  static inline const struct page *page_fixed_fake_head(const struct page *page)
 	return page;
 }
 
-static inline bool hugetlb_free_vmemmap_enabled(void)
+static inline bool hugetlb_optimize_vmemmap_enabled(void)
 {
 	return false;
 }
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 91b79b9d9e25..f25294973398 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -189,8 +189,8 @@ 
 #define RESERVE_VMEMMAP_SIZE		(RESERVE_VMEMMAP_NR << PAGE_SHIFT)
 
 DEFINE_STATIC_KEY_MAYBE(CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON,
-			hugetlb_free_vmemmap_enabled_key);
-EXPORT_SYMBOL(hugetlb_free_vmemmap_enabled_key);
+			hugetlb_optimize_vmemmap_key);
+EXPORT_SYMBOL(hugetlb_optimize_vmemmap_key);
 
 static int __init hugetlb_vmemmap_early_param(char *buf)
 {
@@ -204,9 +204,9 @@  static int __init hugetlb_vmemmap_early_param(char *buf)
 		return -EINVAL;
 
 	if (!strcmp(buf, "on"))
-		static_branch_enable(&hugetlb_free_vmemmap_enabled_key);
+		static_branch_enable(&hugetlb_optimize_vmemmap_key);
 	else if (!strcmp(buf, "off"))
-		static_branch_disable(&hugetlb_free_vmemmap_enabled_key);
+		static_branch_disable(&hugetlb_optimize_vmemmap_key);
 	else
 		return -EINVAL;
 
@@ -282,7 +282,7 @@  void __init hugetlb_vmemmap_init(struct hstate *h)
 	BUILD_BUG_ON(__NR_USED_SUBPAGE >=
 		     RESERVE_VMEMMAP_SIZE / sizeof(struct page));
 
-	if (!hugetlb_free_vmemmap_enabled())
+	if (!hugetlb_optimize_vmemmap_enabled())
 		return;
 
 	vmemmap_pages = (nr_pages * sizeof(struct page)) >> PAGE_SHIFT;
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 3fb4196094d9..74430f88853d 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1273,7 +1273,7 @@  bool mhp_supports_memmap_on_memory(unsigned long size)
 	 *       populate a single PMD.
 	 */
 	return memmap_on_memory &&
-	       !hugetlb_free_vmemmap_enabled() &&
+	       !hugetlb_optimize_vmemmap_enabled() &&
 	       IS_ENABLED(CONFIG_MHP_MEMMAP_ON_MEMORY) &&
 	       size == memory_block_size_bytes() &&
 	       IS_ALIGNED(vmemmap_size, PMD_SIZE) &&