| Message ID | 1436243785-24105-3-git-send-email-gioh.kim@lge.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jul 7, 2015 at 7:36 AM, Gioh Kim <gioh.kim@lge.com> wrote: > From: Gioh Kim <gurugio@hanmail.net> > > Add framework to register callback functions and check page mobility. > There are some modes for page isolation so that isolate interface > has arguments of page address and isolation mode while putback > interface has only page address as argument. > > Signed-off-by: Gioh Kim <gioh.kim@lge.com> > --- > fs/proc/page.c | 3 ++ > include/linux/compaction.h | 76 ++++++++++++++++++++++++++++++++++ > include/linux/fs.h | 2 + > include/linux/page-flags.h | 19 +++++++++ > include/uapi/linux/kernel-page-flags.h | 1 + > 5 files changed, 101 insertions(+) > > diff --git a/fs/proc/page.c b/fs/proc/page.c > index 7eee2d8..a4f5a00 100644 > --- a/fs/proc/page.c > +++ b/fs/proc/page.c > @@ -146,6 +146,9 @@ u64 stable_page_flags(struct page *page) > if (PageBalloon(page)) > u |= 1 << KPF_BALLOON; > > + if (PageMobile(page)) > + u |= 1 << KPF_MOBILE; > + > u |= kpf_copy_bit(k, KPF_LOCKED, PG_locked); > > u |= kpf_copy_bit(k, KPF_SLAB, PG_slab); > diff --git a/include/linux/compaction.h b/include/linux/compaction.h > index aa8f61c..c375a89 100644 > --- a/include/linux/compaction.h > +++ b/include/linux/compaction.h > @@ -1,6 +1,9 @@ > #ifndef _LINUX_COMPACTION_H > #define _LINUX_COMPACTION_H > > +#include <linux/page-flags.h> > +#include <linux/pagemap.h> > + > /* Return values for compact_zone() and try_to_compact_pages() */ > /* compaction didn't start as it was deferred due to past failures */ > #define COMPACT_DEFERRED 0 > @@ -51,6 +54,66 @@ extern void compaction_defer_reset(struct zone *zone, int order, > bool alloc_success); > extern bool compaction_restarting(struct zone *zone, int order); > > +static inline bool mobile_page(struct page *page) > +{ > + return page->mapping && page->mapping->a_ops && Dereferncing mapping->a_ops isn't safe without page-lock and isn't required: all mappings always have ->a_ops. > + (PageMobile(page) || PageBalloon(page)); > +} > + > +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) > +{ > + bool ret; > + > + /* > + * Avoid burning cycles with pages that are yet under __free_pages(), > + * or just got freed under us. > + * > + * In case we 'win' a race for a mobile page being freed under us and > + * raise its refcount preventing __free_pages() from doing its job > + * the put_page() at the end of this block will take care of > + * release this page, thus avoiding a nasty leakage. > + */ > + if (likely(get_page_unless_zero(page))) { > + /* > + * As mobile pages are not isolated from LRU lists, concurrent > + * compaction threads can race against page migration functions > + * as well as race against the releasing a page. > + * > + * In order to avoid having an already isolated mobile page > + * being (wrongly) re-isolated while it is under migration, > + * or to avoid attempting to isolate pages being released, > + * lets be sure we have the page lock > + * before proceeding with the mobile page isolation steps. > + */ > + if (likely(trylock_page(page))) { > + if (mobile_page(page) && > + page->mapping->a_ops->isolatepage) { > + ret = page->mapping->a_ops->isolatepage(page, > + mode); > + unlock_page(page); > + return ret; > + } > + unlock_page(page); > + } > + put_page(page); > + } > + return false; > +} > + > +static inline void putback_mobilepage(struct page *page) > +{ > + /* > + * 'lock_page()' stabilizes the page and prevents races against > + * concurrent isolation threads attempting to re-isolate it. > + */ > + lock_page(page); > + if (mobile_page(page) && page->mapping->a_ops->putbackpage) { It seems "if (page->mapping && page->mapping->a_ops->putbackpage)" should be enough: we already seen that page as mobile. > + page->mapping->a_ops->putbackpage(page); > + /* drop the extra ref count taken for mobile page isolation */ > + put_page(page); > + } > + unlock_page(page); call put_page() after unlock and do that always -- putback must drop page reference from caller. lock_page(page); if (page->mapping && page->mapping->a_ops->putbackpage) page->mapping->a_ops->putbackpage(page); unlock_page(); put_page(page); > +} > #else > static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, > unsigned int order, int alloc_flags, > @@ -83,6 +146,19 @@ static inline bool compaction_deferred(struct zone *zone, int order) > return true; > } > > +static inline bool mobile_page(struct page *page) > +{ > + return false; > +} > + > +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) > +{ > + return false; > +} > + > +static inline void putback_mobilepage(struct page *page) > +{ > +} > #endif /* CONFIG_COMPACTION */ > > #if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 35ec87e..33c9aa5 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -395,6 +395,8 @@ struct address_space_operations { > */ > int (*migratepage) (struct address_space *, > struct page *, struct page *, enum migrate_mode); > + bool (*isolatepage) (struct page *, isolate_mode_t); > + void (*putbackpage) (struct page *); > int (*launder_page) (struct page *); > int (*is_partially_uptodate) (struct page *, unsigned long, > unsigned long); > diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h > index f34e040..abef145 100644 > --- a/include/linux/page-flags.h > +++ b/include/linux/page-flags.h > @@ -582,6 +582,25 @@ static inline void __ClearPageBalloon(struct page *page) > atomic_set(&page->_mapcount, -1); > } > > +#define PAGE_MOBILE_MAPCOUNT_VALUE (-255) > + > +static inline int PageMobile(struct page *page) > +{ > + return atomic_read(&page->_mapcount) == PAGE_MOBILE_MAPCOUNT_VALUE; > +} > + > +static inline void __SetPageMobile(struct page *page) > +{ > + VM_BUG_ON_PAGE(atomic_read(&page->_mapcount) != -1, page); > + atomic_set(&page->_mapcount, PAGE_MOBILE_MAPCOUNT_VALUE); > +} > + > +static inline void __ClearPageMobile(struct page *page) > +{ > + VM_BUG_ON_PAGE(!PageMobile(page), page); > + atomic_set(&page->_mapcount, -1); > +} > + > /* > * If network-based swap is enabled, sl*b must keep track of whether pages > * were allocated from pfmemalloc reserves. > diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h > index a6c4962..d50d9e8 100644 > --- a/include/uapi/linux/kernel-page-flags.h > +++ b/include/uapi/linux/kernel-page-flags.h > @@ -33,6 +33,7 @@ > #define KPF_THP 22 > #define KPF_BALLOON 23 > #define KPF_ZERO_PAGE 24 > +#define KPF_MOBILE 25 > > > #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */ > -- > 2.1.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
One more note below. On Tue, Jul 7, 2015 at 7:36 AM, Gioh Kim <gioh.kim@lge.com> wrote: > From: Gioh Kim <gurugio@hanmail.net> > > Add framework to register callback functions and check page mobility. > There are some modes for page isolation so that isolate interface > has arguments of page address and isolation mode while putback > interface has only page address as argument. > > Signed-off-by: Gioh Kim <gioh.kim@lge.com> > --- > fs/proc/page.c | 3 ++ > include/linux/compaction.h | 76 ++++++++++++++++++++++++++++++++++ > include/linux/fs.h | 2 + > include/linux/page-flags.h | 19 +++++++++ > include/uapi/linux/kernel-page-flags.h | 1 + > 5 files changed, 101 insertions(+) > > diff --git a/fs/proc/page.c b/fs/proc/page.c > index 7eee2d8..a4f5a00 100644 > --- a/fs/proc/page.c > +++ b/fs/proc/page.c > @@ -146,6 +146,9 @@ u64 stable_page_flags(struct page *page) > if (PageBalloon(page)) > u |= 1 << KPF_BALLOON; > > + if (PageMobile(page)) > + u |= 1 << KPF_MOBILE; > + > u |= kpf_copy_bit(k, KPF_LOCKED, PG_locked); > > u |= kpf_copy_bit(k, KPF_SLAB, PG_slab); > diff --git a/include/linux/compaction.h b/include/linux/compaction.h > index aa8f61c..c375a89 100644 > --- a/include/linux/compaction.h > +++ b/include/linux/compaction.h > @@ -1,6 +1,9 @@ > #ifndef _LINUX_COMPACTION_H > #define _LINUX_COMPACTION_H > > +#include <linux/page-flags.h> > +#include <linux/pagemap.h> > + > /* Return values for compact_zone() and try_to_compact_pages() */ > /* compaction didn't start as it was deferred due to past failures */ > #define COMPACT_DEFERRED 0 > @@ -51,6 +54,66 @@ extern void compaction_defer_reset(struct zone *zone, int order, > bool alloc_success); > extern bool compaction_restarting(struct zone *zone, int order); > > +static inline bool mobile_page(struct page *page) > +{ > + return page->mapping && page->mapping->a_ops && > + (PageMobile(page) || PageBalloon(page)); > +} > + > +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) > +{ > + bool ret; > + > + /* > + * Avoid burning cycles with pages that are yet under __free_pages(), > + * or just got freed under us. > + * > + * In case we 'win' a race for a mobile page being freed under us and > + * raise its refcount preventing __free_pages() from doing its job > + * the put_page() at the end of this block will take care of > + * release this page, thus avoiding a nasty leakage. > + */ > + if (likely(get_page_unless_zero(page))) { > + /* > + * As mobile pages are not isolated from LRU lists, concurrent > + * compaction threads can race against page migration functions > + * as well as race against the releasing a page. > + * > + * In order to avoid having an already isolated mobile page > + * being (wrongly) re-isolated while it is under migration, > + * or to avoid attempting to isolate pages being released, > + * lets be sure we have the page lock > + * before proceeding with the mobile page isolation steps. > + */ > + if (likely(trylock_page(page))) { > + if (mobile_page(page) && > + page->mapping->a_ops->isolatepage) { > + ret = page->mapping->a_ops->isolatepage(page, > + mode); > + unlock_page(page); Here you leak page reference if isolatepage() fails. > + return ret; > + } > + unlock_page(page); > + } > + put_page(page); > + } > + return false; > +} > + > +static inline void putback_mobilepage(struct page *page) > +{ > + /* > + * 'lock_page()' stabilizes the page and prevents races against > + * concurrent isolation threads attempting to re-isolate it. > + */ > + lock_page(page); > + if (mobile_page(page) && page->mapping->a_ops->putbackpage) { > + page->mapping->a_ops->putbackpage(page); > + /* drop the extra ref count taken for mobile page isolation */ > + put_page(page); > + } > + unlock_page(page); > +} > #else > static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, > unsigned int order, int alloc_flags, > @@ -83,6 +146,19 @@ static inline bool compaction_deferred(struct zone *zone, int order) > return true; > } > > +static inline bool mobile_page(struct page *page) > +{ > + return false; > +} > + > +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) > +{ > + return false; > +} > + > +static inline void putback_mobilepage(struct page *page) > +{ > +} > #endif /* CONFIG_COMPACTION */ > > #if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 35ec87e..33c9aa5 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -395,6 +395,8 @@ struct address_space_operations { > */ > int (*migratepage) (struct address_space *, > struct page *, struct page *, enum migrate_mode); > + bool (*isolatepage) (struct page *, isolate_mode_t); > + void (*putbackpage) (struct page *); > int (*launder_page) (struct page *); > int (*is_partially_uptodate) (struct page *, unsigned long, > unsigned long); > diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h > index f34e040..abef145 100644 > --- a/include/linux/page-flags.h > +++ b/include/linux/page-flags.h > @@ -582,6 +582,25 @@ static inline void __ClearPageBalloon(struct page *page) > atomic_set(&page->_mapcount, -1); > } > > +#define PAGE_MOBILE_MAPCOUNT_VALUE (-255) > + > +static inline int PageMobile(struct page *page) > +{ > + return atomic_read(&page->_mapcount) == PAGE_MOBILE_MAPCOUNT_VALUE; > +} > + > +static inline void __SetPageMobile(struct page *page) > +{ > + VM_BUG_ON_PAGE(atomic_read(&page->_mapcount) != -1, page); > + atomic_set(&page->_mapcount, PAGE_MOBILE_MAPCOUNT_VALUE); > +} > + > +static inline void __ClearPageMobile(struct page *page) > +{ > + VM_BUG_ON_PAGE(!PageMobile(page), page); > + atomic_set(&page->_mapcount, -1); > +} > + > /* > * If network-based swap is enabled, sl*b must keep track of whether pages > * were allocated from pfmemalloc reserves. > diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h > index a6c4962..d50d9e8 100644 > --- a/include/uapi/linux/kernel-page-flags.h > +++ b/include/uapi/linux/kernel-page-flags.h > @@ -33,6 +33,7 @@ > #define KPF_THP 22 > #define KPF_BALLOON 23 > #define KPF_ZERO_PAGE 24 > +#define KPF_MOBILE 25 > > > #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */ > -- > 2.1.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
>> @@ -51,6 +54,66 @@ extern void compaction_defer_reset(struct zone *zone, int order, >> bool alloc_success); >> extern bool compaction_restarting(struct zone *zone, int order); >> >> +static inline bool mobile_page(struct page *page) >> +{ >> + return page->mapping && page->mapping->a_ops && > > Dereferncing mapping->a_ops isn't safe without page-lock and isn't required: > all mappings always have ->a_ops. > I got it. >> +static inline void putback_mobilepage(struct page *page) >> +{ >> + /* >> + * 'lock_page()' stabilizes the page and prevents races against >> + * concurrent isolation threads attempting to re-isolate it. >> + */ >> + lock_page(page); >> + if (mobile_page(page) && page->mapping->a_ops->putbackpage) { > > It seems "if (page->mapping && page->mapping->a_ops->putbackpage)" > should be enough: we already seen that page as mobile. Ditto. > >> + page->mapping->a_ops->putbackpage(page); >> + /* drop the extra ref count taken for mobile page isolation */ >> + put_page(page); >> + } >> + unlock_page(page); > > call put_page() after unlock and do that always -- putback must drop > page reference from caller. > > lock_page(page); > if (page->mapping && page->mapping->a_ops->putbackpage) > page->mapping->a_ops->putbackpage(page); > unlock_page(); > put_page(page); > Ditto. >> +} >> #else >> static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, >> unsigned int order, int alloc_flags, >> @@ -83,6 +146,19 @@ static inline bool compaction_deferred(struct zone *zone, int order) >> return true; >> } >> >> +static inline bool mobile_page(struct page *page) >> +{ >> + return false; >> +} >> + >> +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) >> +{ >> + return false; >> +} >> + >> +static inline void putback_mobilepage(struct page *page) >> +{ >> +} >> #endif /* CONFIG_COMPACTION */ >> >> #if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) >> diff --git a/include/linux/fs.h b/include/linux/fs.h >> index 35ec87e..33c9aa5 100644 >> --- a/include/linux/fs.h >> +++ b/include/linux/fs.h >> @@ -395,6 +395,8 @@ struct address_space_operations { >> */ >> int (*migratepage) (struct address_space *, >> struct page *, struct page *, enum migrate_mode); >> + bool (*isolatepage) (struct page *, isolate_mode_t); >> + void (*putbackpage) (struct page *); >> int (*launder_page) (struct page *); >> int (*is_partially_uptodate) (struct page *, unsigned long, >> unsigned long); >> diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h >> index f34e040..abef145 100644 >> --- a/include/linux/page-flags.h >> +++ b/include/linux/page-flags.h >> @@ -582,6 +582,25 @@ static inline void __ClearPageBalloon(struct page *page) >> atomic_set(&page->_mapcount, -1); >> } >> >> +#define PAGE_MOBILE_MAPCOUNT_VALUE (-255) >> + >> +static inline int PageMobile(struct page *page) >> +{ >> + return atomic_read(&page->_mapcount) == PAGE_MOBILE_MAPCOUNT_VALUE; >> +} >> + >> +static inline void __SetPageMobile(struct page *page) >> +{ >> + VM_BUG_ON_PAGE(atomic_read(&page->_mapcount) != -1, page); >> + atomic_set(&page->_mapcount, PAGE_MOBILE_MAPCOUNT_VALUE); >> +} >> + >> +static inline void __ClearPageMobile(struct page *page) >> +{ >> + VM_BUG_ON_PAGE(!PageMobile(page), page); >> + atomic_set(&page->_mapcount, -1); >> +} >> + >> /* >> * If network-based swap is enabled, sl*b must keep track of whether pages >> * were allocated from pfmemalloc reserves. >> diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h >> index a6c4962..d50d9e8 100644 >> --- a/include/uapi/linux/kernel-page-flags.h >> +++ b/include/uapi/linux/kernel-page-flags.h >> @@ -33,6 +33,7 @@ >> #define KPF_THP 22 >> #define KPF_BALLOON 23 >> #define KPF_ZERO_PAGE 24 >> +#define KPF_MOBILE 25 >> >> >> #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */ >> -- >> 2.1.4 >> > I fixed the code as your comments and I found patch 3/5 and 4/5 could not be applied separately. So I merge them and report new [PATCH]. I appreciate your reviews. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/proc/page.c b/fs/proc/page.c index 7eee2d8..a4f5a00 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -146,6 +146,9 @@ u64 stable_page_flags(struct page *page) if (PageBalloon(page)) u |= 1 << KPF_BALLOON; + if (PageMobile(page)) + u |= 1 << KPF_MOBILE; + u |= kpf_copy_bit(k, KPF_LOCKED, PG_locked); u |= kpf_copy_bit(k, KPF_SLAB, PG_slab); diff --git a/include/linux/compaction.h b/include/linux/compaction.h index aa8f61c..c375a89 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -1,6 +1,9 @@ #ifndef _LINUX_COMPACTION_H #define _LINUX_COMPACTION_H +#include <linux/page-flags.h> +#include <linux/pagemap.h> + /* Return values for compact_zone() and try_to_compact_pages() */ /* compaction didn't start as it was deferred due to past failures */ #define COMPACT_DEFERRED 0 @@ -51,6 +54,66 @@ extern void compaction_defer_reset(struct zone *zone, int order, bool alloc_success); extern bool compaction_restarting(struct zone *zone, int order); +static inline bool mobile_page(struct page *page) +{ + return page->mapping && page->mapping->a_ops && + (PageMobile(page) || PageBalloon(page)); +} + +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) +{ + bool ret; + + /* + * Avoid burning cycles with pages that are yet under __free_pages(), + * or just got freed under us. + * + * In case we 'win' a race for a mobile page being freed under us and + * raise its refcount preventing __free_pages() from doing its job + * the put_page() at the end of this block will take care of + * release this page, thus avoiding a nasty leakage. + */ + if (likely(get_page_unless_zero(page))) { + /* + * As mobile pages are not isolated from LRU lists, concurrent + * compaction threads can race against page migration functions + * as well as race against the releasing a page. + * + * In order to avoid having an already isolated mobile page + * being (wrongly) re-isolated while it is under migration, + * or to avoid attempting to isolate pages being released, + * lets be sure we have the page lock + * before proceeding with the mobile page isolation steps. + */ + if (likely(trylock_page(page))) { + if (mobile_page(page) && + page->mapping->a_ops->isolatepage) { + ret = page->mapping->a_ops->isolatepage(page, + mode); + unlock_page(page); + return ret; + } + unlock_page(page); + } + put_page(page); + } + return false; +} + +static inline void putback_mobilepage(struct page *page) +{ + /* + * 'lock_page()' stabilizes the page and prevents races against + * concurrent isolation threads attempting to re-isolate it. + */ + lock_page(page); + if (mobile_page(page) && page->mapping->a_ops->putbackpage) { + page->mapping->a_ops->putbackpage(page); + /* drop the extra ref count taken for mobile page isolation */ + put_page(page); + } + unlock_page(page); +} #else static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order, int alloc_flags, @@ -83,6 +146,19 @@ static inline bool compaction_deferred(struct zone *zone, int order) return true; } +static inline bool mobile_page(struct page *page) +{ + return false; +} + +static inline bool isolate_mobilepage(struct page *page, isolate_mode_t mode) +{ + return false; +} + +static inline void putback_mobilepage(struct page *page) +{ +} #endif /* CONFIG_COMPACTION */ #if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) diff --git a/include/linux/fs.h b/include/linux/fs.h index 35ec87e..33c9aa5 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -395,6 +395,8 @@ struct address_space_operations { */ int (*migratepage) (struct address_space *, struct page *, struct page *, enum migrate_mode); + bool (*isolatepage) (struct page *, isolate_mode_t); + void (*putbackpage) (struct page *); int (*launder_page) (struct page *); int (*is_partially_uptodate) (struct page *, unsigned long, unsigned long); diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index f34e040..abef145 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -582,6 +582,25 @@ static inline void __ClearPageBalloon(struct page *page) atomic_set(&page->_mapcount, -1); } +#define PAGE_MOBILE_MAPCOUNT_VALUE (-255) + +static inline int PageMobile(struct page *page) +{ + return atomic_read(&page->_mapcount) == PAGE_MOBILE_MAPCOUNT_VALUE; +} + +static inline void __SetPageMobile(struct page *page) +{ + VM_BUG_ON_PAGE(atomic_read(&page->_mapcount) != -1, page); + atomic_set(&page->_mapcount, PAGE_MOBILE_MAPCOUNT_VALUE); +} + +static inline void __ClearPageMobile(struct page *page) +{ + VM_BUG_ON_PAGE(!PageMobile(page), page); + atomic_set(&page->_mapcount, -1); +} + /* * If network-based swap is enabled, sl*b must keep track of whether pages * were allocated from pfmemalloc reserves. diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h index a6c4962..d50d9e8 100644 --- a/include/uapi/linux/kernel-page-flags.h +++ b/include/uapi/linux/kernel-page-flags.h @@ -33,6 +33,7 @@ #define KPF_THP 22 #define KPF_BALLOON 23 #define KPF_ZERO_PAGE 24 +#define KPF_MOBILE 25 #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */