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/* SPDX-License-Identifier: GPL-2.0 */ #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 #include #include #include #include #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH #include #endif #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 { u64 seqnum; struct vm_area_struct *vmas[VMACACHE_SIZE]; }; /* * When updating this, please also update struct resident_page_types[] in * kernel/fork.c */ 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 /* * The arch code makes the following promise: generic code can modify a * PTE, then call arch_tlbbatch_add_mm() (which internally provides all * needed barriers), then call arch_tlbbatch_flush(), and the entries * will be flushed on all CPUs by the time that arch_tlbbatch_flush() * returns. */ struct arch_t