move mm_struct and vm_area_struct (c92ff1bd) · Commits · 戴 / test

include/linux/mm.h

+0 −63

Original line number	Diff line number	Diff line
		@@ -50,69 +50,6 @@ extern int sysctl_legacy_va_layout;
		* mmap() functions).
		*/

		/*
		* This struct defines a memory VMM memory area. There is one of these
		* per VM-area/task. A VM area is any part of the process virtual memory
		* space that has a special rule for the page-fault handlers (ie a shared
		* library, the executable area etc).
		*/
		struct vm_area_struct {
		struct mm_struct * vm_mm; /* The address space we belong to. */
		unsigned long vm_start; /* Our start address within vm_mm. */
		unsigned long vm_end; /* The first byte after our end address
		within vm_mm. */

		/* linked list of VM areas per task, sorted by address */
		struct vm_area_struct *vm_next;

		pgprot_t vm_page_prot; /* Access permissions of this VMA. */
		unsigned long vm_flags; /* Flags, listed below. */

		struct rb_node vm_rb;

		/*
		* For areas with an address space and backing store,
		* linkage into the address_space->i_mmap prio tree, or
		* linkage to the list of like vmas hanging off its node, or
		* linkage of vma in the address_space->i_mmap_nonlinear list.
		*/
		union {
		struct {
		struct list_head list;
		void parent; / aligns with prio_tree_node parent */
		struct vm_area_struct *head;
		} vm_set;

		struct raw_prio_tree_node prio_tree_node;
		} shared;

		/*
		* A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma
		* list, after a COW of one of the file pages. A MAP_SHARED vma
		* can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack
		* or brk vma (with NULL file) can only be in an anon_vma list.
		*/
		struct list_head anon_vma_node; /* Serialized by anon_vma->lock */
		struct anon_vma anon_vma; / Serialized by page_table_lock */

		/* Function pointers to deal with this struct. */
		struct vm_operations_struct * vm_ops;

		/* Information about our backing store: */
		unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
		units, not PAGE_CACHE_SIZE */
		struct file * vm_file; /* File we map to (can be NULL). */
		void * vm_private_data; /* was vm_pte (shared mem) */
		unsigned long vm_truncate_count;/* truncate_count or restart_addr */

		#ifndef CONFIG_MMU
		atomic_t vm_usage; /* refcount (VMAs shared if !MMU) */
		#endif
		#ifdef CONFIG_NUMA
		struct mempolicy vm_policy; / NUMA policy for the VMA */
		#endif
		};

		extern struct kmem_cache *vm_area_cachep;

		/*

include/linux/mm_types.h

+144 −0

Original line number	Diff line number	Diff line
		#ifndef _LINUX_MM_TYPES_H
		#define _LINUX_MM_TYPES_H

		#include <linux/auxvec.h> /* For AT_VECTOR_SIZE */
		#include <linux/types.h>
		#include <linux/threads.h>
		#include <linux/list.h>
		#include <linux/spinlock.h>
		#include <linux/prio_tree.h>
		#include <linux/rbtree.h>
		#include <linux/rwsem.h>
		#include <linux/completion.h>
		#include <asm/page.h>
		#include <asm/mmu.h>

		struct address_space;

		#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
		typedef atomic_long_t mm_counter_t;
		#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
		typedef unsigned long mm_counter_t;
		#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */

		/*
		* Each physical page in the system has a struct page associated with
		* it to keep track of whatever it is we are using the page for at the
		@@ -80,4 +93,135 @@ struct page {
		#endif /* WANT_PAGE_VIRTUAL */
		};

		/*
		* This struct defines a memory VMM memory area. There is one of these
		* per VM-area/task. A VM area is any part of the process virtual memory
		* space that has a special rule for the page-fault handlers (ie a shared
		* library, the executable area etc).
		*/
		struct vm_area_struct {
		struct mm_struct * vm_mm; /* The address space we belong to. */
		unsigned long vm_start; /* Our start address within vm_mm. */
		unsigned long vm_end; /* The first byte after our end address
		within vm_mm. */

		/* linked list of VM areas per task, sorted by address */
		struct vm_area_struct *vm_next;

		pgprot_t vm_page_prot; /* Access permissions of this VMA. */
		unsigned long vm_flags; /* Flags, listed below. */

		struct rb_node vm_rb;

		/*
		* For areas with an address space and backing store,
		* linkage into the address_space->i_mmap prio tree, or
		* linkage to the list of like vmas hanging off its node, or
		* linkage of vma in the address_space->i_mmap_nonlinear list.
		*/
		union {
		struct {
		struct list_head list;
		void parent; / aligns with prio_tree_node parent */
		struct vm_area_struct *head;
		} vm_set;

		struct raw_prio_tree_node prio_tree_node;
		} shared;

		/*
		* A file's MAP_PRIVATE vma can be in both i_mmap tree and anon_vma
		* list, after a COW of one of the file pages. A MAP_SHARED vma
		* can only be in the i_mmap tree. An anonymous MAP_PRIVATE, stack
		* or brk vma (with NULL file) can only be in an anon_vma list.
		*/
		struct list_head anon_vma_node; /* Serialized by anon_vma->lock */
		struct anon_vma anon_vma; / Serialized by page_table_lock */

		/* Function pointers to deal with this struct. */
		struct vm_operations_struct * vm_ops;

		/* Information about our backing store: */
		unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
		units, not PAGE_CACHE_SIZE */
		struct file * vm_file; /* File we map to (can be NULL). */
		void * vm_private_data; /* was vm_pte (shared mem) */
		unsigned long vm_truncate_count;/* truncate_count or restart_addr */

		#ifndef CONFIG_MMU
		atomic_t vm_usage; /* refcount (VMAs shared if !MMU) */
		#endif
		#ifdef CONFIG_NUMA
		struct mempolicy vm_policy; / NUMA policy for the VMA */
		#endif
		};

		struct mm_struct {
		struct vm_area_struct * mmap; /* list of VMAs */
		struct rb_root mm_rb;
		struct vm_area_struct * mmap_cache; /* last find_vma result */
		unsigned long (get_unmapped_area) (struct file filp,
		unsigned long addr, unsigned long len,
		unsigned long pgoff, unsigned long flags);
		void (unmap_area) (struct mm_struct mm, unsigned long addr);
		unsigned long mmap_base; /* base of mmap area */
		unsigned long task_size; /* size of task vm space */
		unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
		unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
		pgd_t * pgd;
		atomic_t mm_users; /* How many users with user space? */
		atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
		int map_count; /* number of VMAs */
		struct rw_semaphore mmap_sem;
		spinlock_t page_table_lock; /* Protects page tables and some counters */

		struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung
		* together off init_mm.mmlist, and are protected
		* by mmlist_lock
		*/

		/* Special counters, in some configurations protected by the
		* page_table_lock, in other configurations by being atomic.
		*/
		mm_counter_t _file_rss;
		mm_counter_t _anon_rss;

		unsigned long hiwater_rss; /* High-watermark of RSS usage */
		unsigned long hiwater_vm; /* High-water virtual memory usage */

		unsigned long total_vm, locked_vm, shared_vm, exec_vm;
		unsigned long stack_vm, reserved_vm, def_flags, nr_ptes;
		unsigned long start_code, end_code, start_data, end_data;
		unsigned long start_brk, brk, start_stack;
		unsigned long arg_start, arg_end, env_start, env_end;

		unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */

		cpumask_t cpu_vm_mask;

		/* Architecture-specific MM context */
		mm_context_t context;

		/* Swap token stuff */
		/*
		* Last value of global fault stamp as seen by this process.
		* In other words, this value gives an indication of how long
		* it has been since this task got the token.
		* Look at mm/thrash.c
		*/
		unsigned int faultstamp;
		unsigned int token_priority;
		unsigned int last_interval;

		unsigned long flags; /* Must use atomic bitops to access the bits */

		/* coredumping support */
		int core_waiters;
		struct completion *core_startup_done, core_done;

		/* aio bits */
		rwlock_t ioctx_list_lock;
		struct kioctx *ioctx_list;
		};

		#endif /* _LINUX_MM_TYPES_H */

include/linux/sched.h

+1 −73

Original line number	Diff line number	Diff line
		#ifndef _LINUX_SCHED_H
		#define _LINUX_SCHED_H

		#include <linux/auxvec.h> /* For AT_VECTOR_SIZE */

		/*
		* cloning flags:
		*/
		@@ -58,12 +56,12 @@ struct sched_param {
		#include <linux/cpumask.h>
		#include <linux/errno.h>
		#include <linux/nodemask.h>
		#include <linux/mm_types.h>

		#include <asm/system.h>
		#include <asm/semaphore.h>
		#include <asm/page.h>
		#include <asm/ptrace.h>
		#include <asm/mmu.h>
		#include <asm/cputime.h>

		#include <linux/smp.h>
		@@ -319,7 +317,6 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
		#define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
		#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
		#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
		typedef atomic_long_t mm_counter_t;

		#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
		/*
		@@ -331,7 +328,6 @@ typedef atomic_long_t mm_counter_t;
		#define add_mm_counter(mm, member, value) (mm)->_##member += (value)
		#define inc_mm_counter(mm, member) (mm)->_##member++
		#define dec_mm_counter(mm, member) (mm)->_##member--
		typedef unsigned long mm_counter_t;

		#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */

		@@ -368,74 +364,6 @@ extern int get_dumpable(struct mm_struct *mm);
		#define MMF_DUMP_FILTER_DEFAULT \
		((1 << MMF_DUMP_ANON_PRIVATE) \| (1 << MMF_DUMP_ANON_SHARED))

		struct mm_struct {
		struct vm_area_struct * mmap; /* list of VMAs */
		struct rb_root mm_rb;
		struct vm_area_struct * mmap_cache; /* last find_vma result */
		unsigned long (get_unmapped_area) (struct file filp,
		unsigned long addr, unsigned long len,
		unsigned long pgoff, unsigned long flags);
		void (unmap_area) (struct mm_struct mm, unsigned long addr);
		unsigned long mmap_base; /* base of mmap area */
		unsigned long task_size; /* size of task vm space */
		unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
		unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
		pgd_t * pgd;
		atomic_t mm_users; /* How many users with user space? */
		atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
		int map_count; /* number of VMAs */
		struct rw_semaphore mmap_sem;
		spinlock_t page_table_lock; /* Protects page tables and some counters */

		struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung
		* together off init_mm.mmlist, and are protected
		* by mmlist_lock
		*/

		/* Special counters, in some configurations protected by the
		* page_table_lock, in other configurations by being atomic.
		*/
		mm_counter_t _file_rss;
		mm_counter_t _anon_rss;

		unsigned long hiwater_rss; /* High-watermark of RSS usage */
		unsigned long hiwater_vm; /* High-water virtual memory usage */

		unsigned long total_vm, locked_vm, shared_vm, exec_vm;
		unsigned long stack_vm, reserved_vm, def_flags, nr_ptes;
		unsigned long start_code, end_code, start_data, end_data;
		unsigned long start_brk, brk, start_stack;
		unsigned long arg_start, arg_end, env_start, env_end;

		unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */

		cpumask_t cpu_vm_mask;

		/* Architecture-specific MM context */
		mm_context_t context;

		/* Swap token stuff */
		/*
		* Last value of global fault stamp as seen by this process.
		* In other words, this value gives an indication of how long
		* it has been since this task got the token.
		* Look at mm/thrash.c
		*/
		unsigned int faultstamp;
		unsigned int token_priority;
		unsigned int last_interval;

		unsigned long flags; /* Must use atomic bitops to access the bits */

		/* coredumping support */
		int core_waiters;
		struct completion *core_startup_done, core_done;

		/* aio bits */
		rwlock_t ioctx_list_lock;
		struct kioctx *ioctx_list;
		};

		struct sighand_struct {
		atomic_t count;
		struct k_sigaction action[_NSIG];

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