Differential D34722 Diff 122104 sys/vm/vm_page.h

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sys/vm/vm_page.h

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	* object/vm_page_t because there is no knowledge of their pte			* object/vm_page_t because there is no knowledge of their pte
	* mappings, and such pages are also not on any PQ queue.			* mappings, and such pages are also not on any PQ queue.
	*			*
	*/			*/
	#define VPO_KMEM_EXEC 0x01 /* kmem mapping allows execution */			#define VPO_KMEM_EXEC 0x01 /* kmem mapping allows execution */
	#define VPO_SWAPSLEEP 0x02 /* waiting for swap to finish */			#define VPO_SWAPSLEEP 0x02 /* waiting for swap to finish */
	#define VPO_UNMANAGED 0x04 /* no PV management for page */			#define VPO_UNMANAGED 0x04 /* no PV management for page */
	#define VPO_SWAPINPROG 0x08 /* swap I/O in progress on page */			#define VPO_SWAPINPROG 0x08 /* swap I/O in progress on page */
				#ifdef BHYVE_SNAPSHOT
				#define VPO_VMM_DIRTY 0x80 /* dirty bit used for bhyve migration */
				#endif

	/*			/*
	* Busy page implementation details.			* Busy page implementation details.
	* The algorithm is taken mostly by rwlock(9) and sx(9) locks implementation,			* The algorithm is taken mostly by rwlock(9) and sx(9) locks implementation,
	* even if the support for owner identity is removed because of size			* even if the support for owner identity is removed because of size
	* constraints. Checks on lock recursion are then not possible, while the			* constraints. Checks on lock recursion are then not possible, while the
	* lock assertions effectiveness is someway reduced.			* lock assertions effectiveness is someway reduced.
	*/			*/
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	void vm_page_xunbusy_hard(vm_page_t m);			void vm_page_xunbusy_hard(vm_page_t m);
	void vm_page_xunbusy_hard_unchecked(vm_page_t m);			void vm_page_xunbusy_hard_unchecked(vm_page_t m);
	void vm_page_set_validclean (vm_page_t, int, int);			void vm_page_set_validclean (vm_page_t, int, int);
	void vm_page_clear_dirty(vm_page_t, int, int);			void vm_page_clear_dirty(vm_page_t, int, int);
	void vm_page_set_invalid(vm_page_t, int, int);			void vm_page_set_invalid(vm_page_t, int, int);
	void vm_page_valid(vm_page_t m);			void vm_page_valid(vm_page_t m);
	int vm_page_is_valid(vm_page_t, int, int);			int vm_page_is_valid(vm_page_t, int, int);
	void vm_page_test_dirty(vm_page_t);			void vm_page_test_dirty(vm_page_t);
				#ifdef BHYVE_SNAPSHOT
				bool vm_page_test_vmm_dirty(vm_page_t m);
				#endif
	vm_page_bits_t vm_page_bits(int base, int size);			vm_page_bits_t vm_page_bits(int base, int size);
	void vm_page_zero_invalid(vm_page_t m, boolean_t setvalid);			void vm_page_zero_invalid(vm_page_t m, boolean_t setvalid);
	void vm_page_free_pages_toq(struct spglist *free, bool update_wire_count);			void vm_page_free_pages_toq(struct spglist *free, bool update_wire_count);

	void vm_page_dirty_KBI(vm_page_t m);			void vm_page_dirty_KBI(vm_page_t m);
	void vm_page_lock_KBI(vm_page_t m, const char *file, int line);			void vm_page_lock_KBI(vm_page_t m, const char *file, int line);
	void vm_page_unlock_KBI(vm_page_t m, const char *file, int line);			void vm_page_unlock_KBI(vm_page_t m, const char *file, int line);
	int vm_page_trylock_KBI(vm_page_t m, const char *file, int line);			int vm_page_trylock_KBI(vm_page_t m, const char *file, int line);
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	vm_page_dirty(vm_page_t m)			vm_page_dirty(vm_page_t m)
	{			{

	/* Use vm_page_dirty_KBI() under INVARIANTS to save memory. */			/* Use vm_page_dirty_KBI() under INVARIANTS to save memory. */
	#if (defined(KLD_MODULE) && !defined(KLD_TIED)) \|\| defined(INVARIANTS)			#if (defined(KLD_MODULE) && !defined(KLD_TIED)) \|\| defined(INVARIANTS)
	vm_page_dirty_KBI(m);			vm_page_dirty_KBI(m);
	#else			#else
	m->dirty = VM_PAGE_BITS_ALL;			m->dirty = VM_PAGE_BITS_ALL;
				#ifdef BHYVE_SNAPSHOT
				m->oflags \|= VPO_VMM_DIRTY;
				#endif
	#endif			#endif
	}			}

	/*			/*
	* vm_page_undirty:			* vm_page_undirty:
	*			*
	* Set page to not be dirty. Note: does not clear pmap modify bits			* Set page to not be dirty. Note: does not clear pmap modify bits
	*/			*/
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