[RFC,v1,03/11] mm: move definition of num_poisoned_pages_inc/dec to include/linux/mm.h
diff mbox series

Message ID 1541746035-13408-4-git-send-email-n-horiguchi@ah.jp.nec.com
State New
Headers show
Series
  • hwpoison improvement part 1
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Commit Message

Naoya Horiguchi Nov. 9, 2018, 6:47 a.m. UTC
num_poisoned_pages_inc/dec had better be visible to some file like
mm/sparse.c and mm/page_alloc.c (for a subsequent patch). So let's
move it to include/linux/mm.h.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
---
 include/linux/mm.h      | 13 ++++++++++++-
 include/linux/swapops.h | 16 ----------------
 mm/sparse.c             |  2 +-
 3 files changed, 13 insertions(+), 18 deletions(-)

Comments

Anshuman Khandual Nov. 9, 2018, 10:28 a.m. UTC | #1
On 11/09/2018 12:17 PM, Naoya Horiguchi wrote:
> num_poisoned_pages_inc/dec had better be visible to some file like
> mm/sparse.c and mm/page_alloc.c (for a subsequent patch). So let's
> move it to include/linux/mm.h.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> ---
>  include/linux/mm.h      | 13 ++++++++++++-
>  include/linux/swapops.h | 16 ----------------
>  mm/sparse.c             |  2 +-
>  3 files changed, 13 insertions(+), 18 deletions(-)
> 
> diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
> index 59df394..22623ba 100644
> --- v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h
> +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
> @@ -2741,7 +2741,7 @@ extern void shake_page(struct page *p, int access);
>  extern atomic_long_t num_poisoned_pages __read_mostly;
>  extern int soft_offline_page(struct page *page, int flags);
>  
> -
> +#ifdef CONFIG_MEMORY_FAILURE
>  /*
>   * Error handlers for various types of pages.
>   */
> @@ -2777,6 +2777,17 @@ enum mf_action_page_type {
>  	MF_MSG_UNKNOWN,
>  };
>  
> +static inline void num_poisoned_pages_inc(void)
> +{
> +	atomic_long_inc(&num_poisoned_pages);
> +}
> +
> +static inline void num_poisoned_pages_dec(void)
> +{
> +	atomic_long_dec(&num_poisoned_pages);
> +}
> +#endif
> +
>  #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
>  extern void clear_huge_page(struct page *page,
>  			    unsigned long addr_hint,
> diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
> index 4d96166..88137e9 100644
> --- v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h
> +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
> @@ -320,8 +320,6 @@ static inline int is_pmd_migration_entry(pmd_t pmd)
>  
>  #ifdef CONFIG_MEMORY_FAILURE
>  
> -extern atomic_long_t num_poisoned_pages __read_mostly;
> -
>  /*
>   * Support for hardware poisoned pages
>   */
> @@ -336,16 +334,6 @@ static inline int is_hwpoison_entry(swp_entry_t entry)
>  	return swp_type(entry) == SWP_HWPOISON;
>  }
>  
> -static inline void num_poisoned_pages_inc(void)
> -{
> -	atomic_long_inc(&num_poisoned_pages);
> -}
> -
> -static inline void num_poisoned_pages_dec(void)
> -{
> -	atomic_long_dec(&num_poisoned_pages);
> -}
> -
>  #else
>  
>  static inline swp_entry_t make_hwpoison_entry(struct page *page)
> @@ -357,10 +345,6 @@ static inline int is_hwpoison_entry(swp_entry_t swp)
>  {
>  	return 0;
>  }
> -
> -static inline void num_poisoned_pages_inc(void)
> -{
> -}

I hope this was a stray definition and redundant which does not prevent
build in absence of CONFIG_MEMORY_FAILURE.

>  #endif
>  
>  #if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION)
> diff --git v4.19-mmotm-2018-10-30-16-08/mm/sparse.c v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
> index 33307fc..7ada2e5 100644
> --- v4.19-mmotm-2018-10-30-16-08/mm/sparse.c
> +++ v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
> @@ -726,7 +726,7 @@ static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
>  
>  	for (i = 0; i < nr_pages; i++) {
>  		if (PageHWPoison(&memmap[i])) {
> -			atomic_long_sub(1, &num_poisoned_pages);
> +			num_poisoned_pages_dec();
>  			ClearPageHWPoison(&memmap[i]);
>  		}
>  	}
> 

Otherwise looks good.

Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Naoya Horiguchi Nov. 13, 2018, 12:17 a.m. UTC | #2
On Fri, Nov 09, 2018 at 03:58:27PM +0530, Anshuman Khandual wrote:
> 
> 
> On 11/09/2018 12:17 PM, Naoya Horiguchi wrote:
> > num_poisoned_pages_inc/dec had better be visible to some file like
> > mm/sparse.c and mm/page_alloc.c (for a subsequent patch). So let's
> > move it to include/linux/mm.h.
> > 
> > Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> > ---
> >  include/linux/mm.h      | 13 ++++++++++++-
> >  include/linux/swapops.h | 16 ----------------
> >  mm/sparse.c             |  2 +-
> >  3 files changed, 13 insertions(+), 18 deletions(-)
> > 
> > diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
> > index 59df394..22623ba 100644
> > --- v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h
> > +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
> > @@ -2741,7 +2741,7 @@ extern void shake_page(struct page *p, int access);
> >  extern atomic_long_t num_poisoned_pages __read_mostly;
> >  extern int soft_offline_page(struct page *page, int flags);
> >  
> > -
> > +#ifdef CONFIG_MEMORY_FAILURE
> >  /*
> >   * Error handlers for various types of pages.
> >   */
> > @@ -2777,6 +2777,17 @@ enum mf_action_page_type {
> >  	MF_MSG_UNKNOWN,
> >  };
> >  
> > +static inline void num_poisoned_pages_inc(void)
> > +{
> > +	atomic_long_inc(&num_poisoned_pages);
> > +}
> > +
> > +static inline void num_poisoned_pages_dec(void)
> > +{
> > +	atomic_long_dec(&num_poisoned_pages);
> > +}
> > +#endif
> > +
> >  #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
> >  extern void clear_huge_page(struct page *page,
> >  			    unsigned long addr_hint,
> > diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
> > index 4d96166..88137e9 100644
> > --- v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h
> > +++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
> > @@ -320,8 +320,6 @@ static inline int is_pmd_migration_entry(pmd_t pmd)
> >  
> >  #ifdef CONFIG_MEMORY_FAILURE
> >  
> > -extern atomic_long_t num_poisoned_pages __read_mostly;
> > -
> >  /*
> >   * Support for hardware poisoned pages
> >   */
> > @@ -336,16 +334,6 @@ static inline int is_hwpoison_entry(swp_entry_t entry)
> >  	return swp_type(entry) == SWP_HWPOISON;
> >  }
> >  
> > -static inline void num_poisoned_pages_inc(void)
> > -{
> > -	atomic_long_inc(&num_poisoned_pages);
> > -}
> > -
> > -static inline void num_poisoned_pages_dec(void)
> > -{
> > -	atomic_long_dec(&num_poisoned_pages);
> > -}
> > -
> >  #else
> >  
> >  static inline swp_entry_t make_hwpoison_entry(struct page *page)
> > @@ -357,10 +345,6 @@ static inline int is_hwpoison_entry(swp_entry_t swp)
> >  {
> >  	return 0;
> >  }
> > -
> > -static inline void num_poisoned_pages_inc(void)
> > -{
> > -}
> 
> I hope this was a stray definition and redundant which does not prevent
> build in absence of CONFIG_MEMORY_FAILURE.

You're right :)

> >  #endif
> >  
> >  #if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION)
> > diff --git v4.19-mmotm-2018-10-30-16-08/mm/sparse.c v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
> > index 33307fc..7ada2e5 100644
> > --- v4.19-mmotm-2018-10-30-16-08/mm/sparse.c
> > +++ v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
> > @@ -726,7 +726,7 @@ static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
> >  
> >  	for (i = 0; i < nr_pages; i++) {
> >  		if (PageHWPoison(&memmap[i])) {
> > -			atomic_long_sub(1, &num_poisoned_pages);
> > +			num_poisoned_pages_dec();
> >  			ClearPageHWPoison(&memmap[i]);
> >  		}
> >  	}
> > 
> 
> Otherwise looks good.
> 
> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>

Thanks!
Naoya Horiguchi

Patch
diff mbox series

diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
index 59df394..22623ba 100644
--- v4.19-mmotm-2018-10-30-16-08/include/linux/mm.h
+++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/mm.h
@@ -2741,7 +2741,7 @@  extern void shake_page(struct page *p, int access);
 extern atomic_long_t num_poisoned_pages __read_mostly;
 extern int soft_offline_page(struct page *page, int flags);
 
-
+#ifdef CONFIG_MEMORY_FAILURE
 /*
  * Error handlers for various types of pages.
  */
@@ -2777,6 +2777,17 @@  enum mf_action_page_type {
 	MF_MSG_UNKNOWN,
 };
 
+static inline void num_poisoned_pages_inc(void)
+{
+	atomic_long_inc(&num_poisoned_pages);
+}
+
+static inline void num_poisoned_pages_dec(void)
+{
+	atomic_long_dec(&num_poisoned_pages);
+}
+#endif
+
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void clear_huge_page(struct page *page,
 			    unsigned long addr_hint,
diff --git v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
index 4d96166..88137e9 100644
--- v4.19-mmotm-2018-10-30-16-08/include/linux/swapops.h
+++ v4.19-mmotm-2018-10-30-16-08_patched/include/linux/swapops.h
@@ -320,8 +320,6 @@  static inline int is_pmd_migration_entry(pmd_t pmd)
 
 #ifdef CONFIG_MEMORY_FAILURE
 
-extern atomic_long_t num_poisoned_pages __read_mostly;
-
 /*
  * Support for hardware poisoned pages
  */
@@ -336,16 +334,6 @@  static inline int is_hwpoison_entry(swp_entry_t entry)
 	return swp_type(entry) == SWP_HWPOISON;
 }
 
-static inline void num_poisoned_pages_inc(void)
-{
-	atomic_long_inc(&num_poisoned_pages);
-}
-
-static inline void num_poisoned_pages_dec(void)
-{
-	atomic_long_dec(&num_poisoned_pages);
-}
-
 #else
 
 static inline swp_entry_t make_hwpoison_entry(struct page *page)
@@ -357,10 +345,6 @@  static inline int is_hwpoison_entry(swp_entry_t swp)
 {
 	return 0;
 }
-
-static inline void num_poisoned_pages_inc(void)
-{
-}
 #endif
 
 #if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION)
diff --git v4.19-mmotm-2018-10-30-16-08/mm/sparse.c v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
index 33307fc..7ada2e5 100644
--- v4.19-mmotm-2018-10-30-16-08/mm/sparse.c
+++ v4.19-mmotm-2018-10-30-16-08_patched/mm/sparse.c
@@ -726,7 +726,7 @@  static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
 
 	for (i = 0; i < nr_pages; i++) {
 		if (PageHWPoison(&memmap[i])) {
-			atomic_long_sub(1, &num_poisoned_pages);
+			num_poisoned_pages_dec();
 			ClearPageHWPoison(&memmap[i]);
 		}
 	}