| #ifndef _LINUX_MM_TYPES_TASK_H |
| #define _LINUX_MM_TYPES_TASK_H |
| |
| /* |
| * Here are the definitions of the MM data types that are embedded in 'struct task_struct'. |
| * |
| * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/threads.h> |
| #include <linux/atomic.h> |
| #include <linux/cpumask.h> |
| |
| #include <asm/page.h> |
| |
| #define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS) |
| #define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \ |
| IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK)) |
| #define ALLOC_SPLIT_PTLOCKS (SPINLOCK_SIZE > BITS_PER_LONG/8) |
| |
| /* |
| * The per task VMA cache array: |
| */ |
| #define VMACACHE_BITS 2 |
| #define VMACACHE_SIZE (1U << VMACACHE_BITS) |
| #define VMACACHE_MASK (VMACACHE_SIZE - 1) |
| |
| struct vmacache { |
| u32 seqnum; |
| struct vm_area_struct *vmas[VMACACHE_SIZE]; |
| }; |
| |
| enum { |
| MM_FILEPAGES, /* Resident file mapping pages */ |
| MM_ANONPAGES, /* Resident anonymous pages */ |
| MM_SWAPENTS, /* Anonymous swap entries */ |
| MM_SHMEMPAGES, /* Resident shared memory pages */ |
| NR_MM_COUNTERS |
| }; |
| |
| #if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU) |
| #define SPLIT_RSS_COUNTING |
| /* per-thread cached information, */ |
| struct task_rss_stat { |
| int events; /* for synchronization threshold */ |
| int count[NR_MM_COUNTERS]; |
| }; |
| #endif /* USE_SPLIT_PTE_PTLOCKS */ |
| |
| struct mm_rss_stat { |
| atomic_long_t count[NR_MM_COUNTERS]; |
| }; |
| |
| struct page_frag { |
| struct page *page; |
| #if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536) |
| __u32 offset; |
| __u32 size; |
| #else |
| __u16 offset; |
| __u16 size; |
| #endif |
| }; |
| |
| /* Track pages that require TLB flushes */ |
| struct tlbflush_unmap_batch { |
| #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH |
| /* |
| * Each bit set is a CPU that potentially has a TLB entry for one of |
| * the PFNs being flushed. See set_tlb_ubc_flush_pending(). |
| */ |
| struct cpumask cpumask; |
| |
| /* True if any bit in cpumask is set */ |
| bool flush_required; |
| |
| /* |
| * If true then the PTE was dirty when unmapped. The entry must be |
| * flushed before IO is initiated or a stale TLB entry potentially |
| * allows an update without redirtying the page. |
| */ |
| bool writable; |
| #endif |
| }; |
| |
| #endif /* _LINUX_MM_TYPES_TASK_H */ |