diff --git a/Documentation/admin-guide/mm/pagemap.rst b/Documentation/admin-guide/mm/pagemap.rst index 3f7bade2c231e0eb402dcc4be4be4d0560ccf46f..340a5aee9b80268cf5c3c0e05962a5df97f77bcd 100644 --- a/Documentation/admin-guide/mm/pagemap.rst +++ b/Documentation/admin-guide/mm/pagemap.rst @@ -75,9 +75,10 @@ number of times a page is mapped. 20. NOPAGE 21. KSM 22. THP - 23. BALLOON + 23. OFFLINE 24. ZERO_PAGE 25. IDLE + 26. PGTABLE * ``/proc/kpagecgroup``. This file contains a 64-bit inode number of the memory cgroup each page is charged to, indexed by PFN. Only available when @@ -118,8 +119,8 @@ Short descriptions to the page flags identical memory pages dynamically shared between one or more processes 22 - THP contiguous pages which construct transparent hugepages -23 - BALLOON - balloon compaction page +23 - OFFLINE + page is logically offline 24 - ZERO_PAGE zero page for pfn_zero or huge_zero page 25 - IDLE @@ -128,6 +129,8 @@ Short descriptions to the page flags Note that this flag may be stale in case the page was accessed via a PTE. To make sure the flag is up-to-date one has to read ``/sys/kernel/mm/page_idle/bitmap`` first. +26 - PGTABLE + page is in use as a page table IO related page flags --------------------- diff --git a/fs/proc/page.c b/fs/proc/page.c index 64293df0faa3bcdb57f1680bc9cd3fdd53aea951..9169ef17cb7776dc7750df618e9a55ce62770ec6 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -154,8 +154,8 @@ u64 stable_page_flags(struct page *page) else if (page_count(page) == 0 && is_free_buddy_page(page)) u |= 1 << KPF_BUDDY; - if (PageBalloon(page)) - u |= 1 << KPF_BALLOON; + if (PageOffline(page)) + u |= 1 << KPF_OFFLINE; if (PageTable(page)) u |= 1 << KPF_PGTABLE; diff --git a/include/linux/balloon_compaction.h b/include/linux/balloon_compaction.h index 53051f3d8f2561207c4da0d4e12aa1d7e5a0470b..fe6a91d6426d978a4f3b3ec57274ced0dda1b2c0 100644 --- a/include/linux/balloon_compaction.h +++ b/include/linux/balloon_compaction.h @@ -103,7 +103,7 @@ extern int balloon_page_migrate(struct address_space *mapping, static inline void balloon_page_insert(struct balloon_dev_info *balloon, struct page *page) { - __SetPageBalloon(page); + __SetPageOffline(page); __SetPageMovable(page, balloon->inode->i_mapping); set_page_private(page, (unsigned long)balloon); list_add(&page->lru, &balloon->pages); @@ -119,7 +119,7 @@ static inline void balloon_page_insert(struct balloon_dev_info *balloon, */ static inline void balloon_page_delete(struct page *page) { - __ClearPageBalloon(page); + __ClearPageOffline(page); __ClearPageMovable(page); set_page_private(page, 0); /* @@ -149,13 +149,13 @@ static inline gfp_t balloon_mapping_gfp_mask(void) static inline void balloon_page_insert(struct balloon_dev_info *balloon, struct page *page) { - __SetPageBalloon(page); + __SetPageOffline(page); list_add(&page->lru, &balloon->pages); } static inline void balloon_page_delete(struct page *page) { - __ClearPageBalloon(page); + __ClearPageOffline(page); list_del(&page->lru); } diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 0516a98e85b3f3fb82286306d406a6ba047b88a8..abf698297a068ed78cc13af7bf4ea09e58300ce8 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -688,7 +688,7 @@ PAGEFLAG_FALSE(DoubleMap) #define PAGE_TYPE_BASE 0xf0000000 /* Reserve 0x0000007f to catch underflows of page_mapcount */ #define PG_buddy 0x00000080 -#define PG_balloon 0x00000100 +#define PG_offline 0x00000100 #define PG_kmemcg 0x00000200 #define PG_table 0x00000400 @@ -718,10 +718,13 @@ static __always_inline void __ClearPage##uname(struct page *page) \ PAGE_TYPE_OPS(Buddy, buddy) /* - * PageBalloon() is true for pages that are on the balloon page list - * (see mm/balloon_compaction.c). + * PageOffline() indicates that the page is logically offline although the + * containing section is online. (e.g. inflated in a balloon driver or + * not onlined when onlining the section). + * The content of these pages is effectively stale. Such pages should not + * be touched (read/write/dump/save) except by their owner. */ -PAGE_TYPE_OPS(Balloon, balloon) +PAGE_TYPE_OPS(Offline, offline) /* * If kmemcg is enabled, the buddy allocator will set PageKmemcg() on diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h index 21b9113c69da4bb608bf23b58446fde24d682b08..6f2f2720f3ac2697ebcad1e0f963bf350bc14676 100644 --- a/include/uapi/linux/kernel-page-flags.h +++ b/include/uapi/linux/kernel-page-flags.h @@ -32,7 +32,7 @@ #define KPF_KSM 21 #define KPF_THP 22 -#define KPF_BALLOON 23 +#define KPF_OFFLINE 23 #define KPF_ZERO_PAGE 24 #define KPF_IDLE 25 #define KPF_PGTABLE 26 diff --git a/tools/vm/page-types.c b/tools/vm/page-types.c index 1ff3a6c0367b087ee4d84e0fa3b0ed0e2752d2b3..6f64b2b9323429e3dd31629c5eb2b7ef82ff0de4 100644 --- a/tools/vm/page-types.c +++ b/tools/vm/page-types.c @@ -133,7 +133,7 @@ static const char * const page_flag_names[] = { [KPF_NOPAGE] = "n:nopage", [KPF_KSM] = "x:ksm", [KPF_THP] = "t:thp", - [KPF_BALLOON] = "o:balloon", + [KPF_OFFLINE] = "o:offline", [KPF_PGTABLE] = "g:pgtable", [KPF_ZERO_PAGE] = "z:zero_page", [KPF_IDLE] = "i:idle_page",