[1/1] hugetlb_vmemmap: use folio argument for hugetlb_vmemmap_* functions
Commit Message
Most function calls in hugetlb.c are made with folio arguments.
This brings hugetlb_vmemmap calls inline with them by using folio
instead of head struct page. Head struct page is still needed
within these functions.
The set/clear/test functions for hugepages are also changed to
folio versions.
Signed-off-by: Usama Arif <usama.arif@bytedance.com>
---
mm/hugetlb.c | 10 +++++-----
mm/hugetlb_vmemmap.c | 42 ++++++++++++++++++++++--------------------
mm/hugetlb_vmemmap.h | 8 ++++----
3 files changed, 31 insertions(+), 29 deletions(-)
Comments
On 2023/10/9 23:18, Usama Arif wrote:
> Most function calls in hugetlb.c are made with folio arguments.
> This brings hugetlb_vmemmap calls inline with them by using folio
> instead of head struct page. Head struct page is still needed
> within these functions.
>
> The set/clear/test functions for hugepages are also changed to
> folio versions.
>
> Signed-off-by: Usama Arif <usama.arif@bytedance.com>
> ---
> mm/hugetlb.c | 10 +++++-----
> mm/hugetlb_vmemmap.c | 42 ++++++++++++++++++++++--------------------
> mm/hugetlb_vmemmap.h | 8 ++++----
> 3 files changed, 31 insertions(+), 29 deletions(-)
>
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index b12f5fd295bb..73803d62066a 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -1606,7 +1606,7 @@ static void __update_and_free_hugetlb_folio(struct hstate *h,
> * is no longer identified as a hugetlb page. hugetlb_vmemmap_restore
> * can only be passed hugetlb pages and will BUG otherwise.
> */
> - if (clear_dtor && hugetlb_vmemmap_restore(h, &folio->page)) {
> + if (clear_dtor && hugetlb_vmemmap_restore(h, folio)) {
> spin_lock_irq(&hugetlb_lock);
> /*
> * If we cannot allocate vmemmap pages, just refuse to free the
> @@ -1749,7 +1749,7 @@ static void bulk_vmemmap_restore_error(struct hstate *h,
> * quit processing the list to retry the bulk operation.
> */
> list_for_each_entry_safe(folio, t_folio, folio_list, lru)
> - if (hugetlb_vmemmap_restore(h, &folio->page)) {
> + if (hugetlb_vmemmap_restore(h, folio)) {
> list_del(&folio->lru);
> spin_lock_irq(&hugetlb_lock);
> add_hugetlb_folio(h, folio, true);
> @@ -1907,7 +1907,7 @@ static void init_new_hugetlb_folio(struct hstate *h, struct folio *folio)
> static void __prep_new_hugetlb_folio(struct hstate *h, struct folio *folio)
> {
> init_new_hugetlb_folio(h, folio);
> - hugetlb_vmemmap_optimize(h, &folio->page);
> + hugetlb_vmemmap_optimize(h, folio);
> }
>
> static void prep_new_hugetlb_folio(struct hstate *h, struct folio *folio, int nid)
> @@ -2312,7 +2312,7 @@ int dissolve_free_huge_page(struct page *page)
> * Attempt to allocate vmemmmap here so that we can take
> * appropriate action on failure.
> */
> - rc = hugetlb_vmemmap_restore(h, &folio->page);
> + rc = hugetlb_vmemmap_restore(h, folio);
> if (!rc) {
> update_and_free_hugetlb_folio(h, folio, false);
> } else {
> @@ -3721,7 +3721,7 @@ static int demote_free_hugetlb_folio(struct hstate *h, struct folio *folio)
> * passed hugetlb folios and will BUG otherwise.
> */
> if (folio_test_hugetlb(folio)) {
> - rc = hugetlb_vmemmap_restore(h, &folio->page);
> + rc = hugetlb_vmemmap_restore(h, folio);
> if (rc) {
> /* Allocation of vmemmmap failed, we can not demote folio */
> spin_lock_irq(&hugetlb_lock);
> diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
> index d2999c303031..84b5ac93b9e5 100644
> --- a/mm/hugetlb_vmemmap.c
> +++ b/mm/hugetlb_vmemmap.c
> @@ -495,14 +495,15 @@ EXPORT_SYMBOL(hugetlb_optimize_vmemmap_key);
> static bool vmemmap_optimize_enabled = IS_ENABLED(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON);
> core_param(hugetlb_free_vmemmap, vmemmap_optimize_enabled, bool, 0);
>
> -static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, unsigned long flags)
> +static int __hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio, unsigned long flags)
> {
> int ret;
> + struct page *head = &folio->page;
> unsigned long vmemmap_start = (unsigned long)head, vmemmap_end;
> unsigned long vmemmap_reuse;
>
> VM_WARN_ON_ONCE(!PageHuge(head));
> - if (!HPageVmemmapOptimized(head))
> + if (!folio_test_hugetlb_vmemmap_optimized(folio))
> return 0;
>
> vmemmap_end = vmemmap_start + hugetlb_vmemmap_size(h);
> @@ -518,7 +519,7 @@ static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head,
> */
> ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse, flags);
> if (!ret) {
> - ClearHPageVmemmapOptimized(head);
> + folio_clear_hugetlb_vmemmap_optimized(folio);
> static_branch_dec(&hugetlb_optimize_vmemmap_key);
> }
>
> @@ -530,14 +531,14 @@ static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head,
> * hugetlb_vmemmap_optimize()) vmemmap pages which
> * will be reallocated and remapped.
> * @h: struct hstate.
> - * @head: the head page whose vmemmap pages will be restored.
> + * @folio: the folio whose vmemmap pages will be restored.
> *
> - * Return: %0 if @head's vmemmap pages have been reallocated and remapped,
> + * Return: %0 if @folio's vmemmap pages have been reallocated and remapped,
> * negative error code otherwise.
> */
> -int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head)
> +int hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio)
I'd like to rename this to hugetlb_vmemmap_restore_folio to be consistent
with hugetlb_vmemmap_restore_folios.
> {
> - return __hugetlb_vmemmap_restore(h, head, 0);
> + return __hugetlb_vmemmap_restore(h, folio, 0);
> }
>
> /**
> @@ -563,7 +564,7 @@ long hugetlb_vmemmap_restore_folios(const struct hstate *h,
>
> list_for_each_entry_safe(folio, t_folio, folio_list, lru) {
> if (folio_test_hugetlb_vmemmap_optimized(folio)) {
> - ret = __hugetlb_vmemmap_restore(h, &folio->page,
> + ret = __hugetlb_vmemmap_restore(h, folio,
> VMEMMAP_REMAP_NO_TLB_FLUSH);
> if (ret)
> break;
> @@ -641,11 +642,12 @@ static bool vmemmap_should_optimize(const struct hstate *h, const struct page *h
> }
>
> static int __hugetlb_vmemmap_optimize(const struct hstate *h,
> - struct page *head,
> + struct folio *folio,
> struct list_head *vmemmap_pages,
> unsigned long flags)
> {
> int ret = 0;
> + struct page *head = &folio->page;
> unsigned long vmemmap_start = (unsigned long)head, vmemmap_end;
> unsigned long vmemmap_reuse;
>
> @@ -665,7 +667,7 @@ static int __hugetlb_vmemmap_optimize(const struct hstate *h,
> * If there is an error during optimization, we will immediately FLUSH
> * the TLB and clear the flag below.
> */
> - SetHPageVmemmapOptimized(head);
> + folio_set_hugetlb_vmemmap_optimized(folio);
>
> vmemmap_end = vmemmap_start + hugetlb_vmemmap_size(h);
> vmemmap_reuse = vmemmap_start;
> @@ -681,27 +683,27 @@ static int __hugetlb_vmemmap_optimize(const struct hstate *h,
> vmemmap_pages, flags);
> if (ret) {
> static_branch_dec(&hugetlb_optimize_vmemmap_key);
> - ClearHPageVmemmapOptimized(head);
> + folio_clear_hugetlb_vmemmap_optimized(folio);
> }
>
> return ret;
> }
>
> /**
> - * hugetlb_vmemmap_optimize - optimize @head page's vmemmap pages.
> + * hugetlb_vmemmap_optimize - optimize @folio's vmemmap pages.
> * @h: struct hstate.
> - * @head: the head page whose vmemmap pages will be optimized.
> + * @folio: the folio whose vmemmap pages will be optimized.
> *
> - * This function only tries to optimize @head's vmemmap pages and does not
> + * This function only tries to optimize @folio's vmemmap pages and does not
> * guarantee that the optimization will succeed after it returns. The caller
> - * can use HPageVmemmapOptimized(@head) to detect if @head's vmemmap pages
> - * have been optimized.
> + * can use folio_test_hugetlb_vmemmap_optimized(@folio) to detect if @folio's
> + * vmemmap pages have been optimized.
> */
> -void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head)
> +void hugetlb_vmemmap_optimize(const struct hstate *h, struct folio *folio)
The same as here. Otherwise, LGTM. Please free to add:
Reviewed-by: Muchun Song <songmuchun@bytedance.com> in you next edition.
Thanks.
> {
> LIST_HEAD(vmemmap_pages);
>
> - __hugetlb_vmemmap_optimize(h, head, &vmemmap_pages, 0);
> + __hugetlb_vmemmap_optimize(h, folio, &vmemmap_pages, 0);
> free_vmemmap_page_list(&vmemmap_pages);
> }
>
> @@ -745,7 +747,7 @@ void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_l
> flush_tlb_all();
>
> list_for_each_entry(folio, folio_list, lru) {
> - int ret = __hugetlb_vmemmap_optimize(h, &folio->page,
> + int ret = __hugetlb_vmemmap_optimize(h, folio,
> &vmemmap_pages,
> VMEMMAP_REMAP_NO_TLB_FLUSH);
>
> @@ -761,7 +763,7 @@ void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_l
> flush_tlb_all();
> free_vmemmap_page_list(&vmemmap_pages);
> INIT_LIST_HEAD(&vmemmap_pages);
> - __hugetlb_vmemmap_optimize(h, &folio->page,
> + __hugetlb_vmemmap_optimize(h, folio,
> &vmemmap_pages,
> VMEMMAP_REMAP_NO_TLB_FLUSH);
> }
> diff --git a/mm/hugetlb_vmemmap.h b/mm/hugetlb_vmemmap.h
> index a0dcf49f46ba..6a06dccd7ffa 100644
> --- a/mm/hugetlb_vmemmap.h
> +++ b/mm/hugetlb_vmemmap.h
> @@ -18,11 +18,11 @@
> #define HUGETLB_VMEMMAP_RESERVE_PAGES (HUGETLB_VMEMMAP_RESERVE_SIZE / sizeof(struct page))
>
> #ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
> -int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head);
> +int hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio);
> long hugetlb_vmemmap_restore_folios(const struct hstate *h,
> struct list_head *folio_list,
> struct list_head *non_hvo_folios);
> -void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head);
> +void hugetlb_vmemmap_optimize(const struct hstate *h, struct folio *folio);
> void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_list);
>
> static inline unsigned int hugetlb_vmemmap_size(const struct hstate *h)
> @@ -43,7 +43,7 @@ static inline unsigned int hugetlb_vmemmap_optimizable_size(const struct hstate
> return size > 0 ? size : 0;
> }
> #else
> -static inline int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head)
> +static inline int hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio)
> {
> return 0;
> }
> @@ -56,7 +56,7 @@ static long hugetlb_vmemmap_restore_folios(const struct hstate *h,
> return 0;
> }
>
> -static inline void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head)
> +static inline void hugetlb_vmemmap_optimize(const struct hstate *h, struct folio *folio)
> {
> }
>
@@ -1606,7 +1606,7 @@ static void __update_and_free_hugetlb_folio(struct hstate *h,
* is no longer identified as a hugetlb page. hugetlb_vmemmap_restore
* can only be passed hugetlb pages and will BUG otherwise.
*/
- if (clear_dtor && hugetlb_vmemmap_restore(h, &folio->page)) {
+ if (clear_dtor && hugetlb_vmemmap_restore(h, folio)) {
spin_lock_irq(&hugetlb_lock);
/*
* If we cannot allocate vmemmap pages, just refuse to free the
@@ -1749,7 +1749,7 @@ static void bulk_vmemmap_restore_error(struct hstate *h,
* quit processing the list to retry the bulk operation.
*/
list_for_each_entry_safe(folio, t_folio, folio_list, lru)
- if (hugetlb_vmemmap_restore(h, &folio->page)) {
+ if (hugetlb_vmemmap_restore(h, folio)) {
list_del(&folio->lru);
spin_lock_irq(&hugetlb_lock);
add_hugetlb_folio(h, folio, true);
@@ -1907,7 +1907,7 @@ static void init_new_hugetlb_folio(struct hstate *h, struct folio *folio)
static void __prep_new_hugetlb_folio(struct hstate *h, struct folio *folio)
{
init_new_hugetlb_folio(h, folio);
- hugetlb_vmemmap_optimize(h, &folio->page);
+ hugetlb_vmemmap_optimize(h, folio);
}
static void prep_new_hugetlb_folio(struct hstate *h, struct folio *folio, int nid)
@@ -2312,7 +2312,7 @@ int dissolve_free_huge_page(struct page *page)
* Attempt to allocate vmemmmap here so that we can take
* appropriate action on failure.
*/
- rc = hugetlb_vmemmap_restore(h, &folio->page);
+ rc = hugetlb_vmemmap_restore(h, folio);
if (!rc) {
update_and_free_hugetlb_folio(h, folio, false);
} else {
@@ -3721,7 +3721,7 @@ static int demote_free_hugetlb_folio(struct hstate *h, struct folio *folio)
* passed hugetlb folios and will BUG otherwise.
*/
if (folio_test_hugetlb(folio)) {
- rc = hugetlb_vmemmap_restore(h, &folio->page);
+ rc = hugetlb_vmemmap_restore(h, folio);
if (rc) {
/* Allocation of vmemmmap failed, we can not demote folio */
spin_lock_irq(&hugetlb_lock);
@@ -495,14 +495,15 @@ EXPORT_SYMBOL(hugetlb_optimize_vmemmap_key);
static bool vmemmap_optimize_enabled = IS_ENABLED(CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON);
core_param(hugetlb_free_vmemmap, vmemmap_optimize_enabled, bool, 0);
-static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head, unsigned long flags)
+static int __hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio, unsigned long flags)
{
int ret;
+ struct page *head = &folio->page;
unsigned long vmemmap_start = (unsigned long)head, vmemmap_end;
unsigned long vmemmap_reuse;
VM_WARN_ON_ONCE(!PageHuge(head));
- if (!HPageVmemmapOptimized(head))
+ if (!folio_test_hugetlb_vmemmap_optimized(folio))
return 0;
vmemmap_end = vmemmap_start + hugetlb_vmemmap_size(h);
@@ -518,7 +519,7 @@ static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head,
*/
ret = vmemmap_remap_alloc(vmemmap_start, vmemmap_end, vmemmap_reuse, flags);
if (!ret) {
- ClearHPageVmemmapOptimized(head);
+ folio_clear_hugetlb_vmemmap_optimized(folio);
static_branch_dec(&hugetlb_optimize_vmemmap_key);
}
@@ -530,14 +531,14 @@ static int __hugetlb_vmemmap_restore(const struct hstate *h, struct page *head,
* hugetlb_vmemmap_optimize()) vmemmap pages which
* will be reallocated and remapped.
* @h: struct hstate.
- * @head: the head page whose vmemmap pages will be restored.
+ * @folio: the folio whose vmemmap pages will be restored.
*
- * Return: %0 if @head's vmemmap pages have been reallocated and remapped,
+ * Return: %0 if @folio's vmemmap pages have been reallocated and remapped,
* negative error code otherwise.
*/
-int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head)
+int hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio)
{
- return __hugetlb_vmemmap_restore(h, head, 0);
+ return __hugetlb_vmemmap_restore(h, folio, 0);
}
/**
@@ -563,7 +564,7 @@ long hugetlb_vmemmap_restore_folios(const struct hstate *h,
list_for_each_entry_safe(folio, t_folio, folio_list, lru) {
if (folio_test_hugetlb_vmemmap_optimized(folio)) {
- ret = __hugetlb_vmemmap_restore(h, &folio->page,
+ ret = __hugetlb_vmemmap_restore(h, folio,
VMEMMAP_REMAP_NO_TLB_FLUSH);
if (ret)
break;
@@ -641,11 +642,12 @@ static bool vmemmap_should_optimize(const struct hstate *h, const struct page *h
}
static int __hugetlb_vmemmap_optimize(const struct hstate *h,
- struct page *head,
+ struct folio *folio,
struct list_head *vmemmap_pages,
unsigned long flags)
{
int ret = 0;
+ struct page *head = &folio->page;
unsigned long vmemmap_start = (unsigned long)head, vmemmap_end;
unsigned long vmemmap_reuse;
@@ -665,7 +667,7 @@ static int __hugetlb_vmemmap_optimize(const struct hstate *h,
* If there is an error during optimization, we will immediately FLUSH
* the TLB and clear the flag below.
*/
- SetHPageVmemmapOptimized(head);
+ folio_set_hugetlb_vmemmap_optimized(folio);
vmemmap_end = vmemmap_start + hugetlb_vmemmap_size(h);
vmemmap_reuse = vmemmap_start;
@@ -681,27 +683,27 @@ static int __hugetlb_vmemmap_optimize(const struct hstate *h,
vmemmap_pages, flags);
if (ret) {
static_branch_dec(&hugetlb_optimize_vmemmap_key);
- ClearHPageVmemmapOptimized(head);
+ folio_clear_hugetlb_vmemmap_optimized(folio);
}
return ret;
}
/**
- * hugetlb_vmemmap_optimize - optimize @head page's vmemmap pages.
+ * hugetlb_vmemmap_optimize - optimize @folio's vmemmap pages.
* @h: struct hstate.
- * @head: the head page whose vmemmap pages will be optimized.
+ * @folio: the folio whose vmemmap pages will be optimized.
*
- * This function only tries to optimize @head's vmemmap pages and does not
+ * This function only tries to optimize @folio's vmemmap pages and does not
* guarantee that the optimization will succeed after it returns. The caller
- * can use HPageVmemmapOptimized(@head) to detect if @head's vmemmap pages
- * have been optimized.
+ * can use folio_test_hugetlb_vmemmap_optimized(@folio) to detect if @folio's
+ * vmemmap pages have been optimized.
*/
-void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head)
+void hugetlb_vmemmap_optimize(const struct hstate *h, struct folio *folio)
{
LIST_HEAD(vmemmap_pages);
- __hugetlb_vmemmap_optimize(h, head, &vmemmap_pages, 0);
+ __hugetlb_vmemmap_optimize(h, folio, &vmemmap_pages, 0);
free_vmemmap_page_list(&vmemmap_pages);
}
@@ -745,7 +747,7 @@ void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_l
flush_tlb_all();
list_for_each_entry(folio, folio_list, lru) {
- int ret = __hugetlb_vmemmap_optimize(h, &folio->page,
+ int ret = __hugetlb_vmemmap_optimize(h, folio,
&vmemmap_pages,
VMEMMAP_REMAP_NO_TLB_FLUSH);
@@ -761,7 +763,7 @@ void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_l
flush_tlb_all();
free_vmemmap_page_list(&vmemmap_pages);
INIT_LIST_HEAD(&vmemmap_pages);
- __hugetlb_vmemmap_optimize(h, &folio->page,
+ __hugetlb_vmemmap_optimize(h, folio,
&vmemmap_pages,
VMEMMAP_REMAP_NO_TLB_FLUSH);
}
@@ -18,11 +18,11 @@
#define HUGETLB_VMEMMAP_RESERVE_PAGES (HUGETLB_VMEMMAP_RESERVE_SIZE / sizeof(struct page))
#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
-int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head);
+int hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio);
long hugetlb_vmemmap_restore_folios(const struct hstate *h,
struct list_head *folio_list,
struct list_head *non_hvo_folios);
-void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head);
+void hugetlb_vmemmap_optimize(const struct hstate *h, struct folio *folio);
void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_list);
static inline unsigned int hugetlb_vmemmap_size(const struct hstate *h)
@@ -43,7 +43,7 @@ static inline unsigned int hugetlb_vmemmap_optimizable_size(const struct hstate
return size > 0 ? size : 0;
}
#else
-static inline int hugetlb_vmemmap_restore(const struct hstate *h, struct page *head)
+static inline int hugetlb_vmemmap_restore(const struct hstate *h, struct folio *folio)
{
return 0;
}
@@ -56,7 +56,7 @@ static long hugetlb_vmemmap_restore_folios(const struct hstate *h,
return 0;
}
-static inline void hugetlb_vmemmap_optimize(const struct hstate *h, struct page *head)
+static inline void hugetlb_vmemmap_optimize(const struct hstate *h, struct folio *folio)
{
}