#define _VM_VM_PAGE_H_
#include <debug.h>
+#include <vm/vm_options.h>
#include <mach/boolean.h>
#include <mach/vm_prot.h>
#include <mach/vm_param.h>
#include <vm/vm_object.h>
#include <kern/queue.h>
-#include <kern/lock.h>
+#include <kern/locks.h>
#include <kern/macro_help.h>
#include <libkern/OSAtomic.h>
* change that field; holding either lock is sufficient to read.]
*/
+
+#if defined(__LP64__)
+
+/*
+ * in order to make the size of a vm_page_t 64 bytes (cache line size for both arm64 and x86_64)
+ * we'll keep the next_m pointer packed... as long as the kernel virtual space where we allocate
+ * vm_page_t's from doesn't span more then 256 Gbytes, we're safe. There are live tests in the
+ * vm_page_t array allocation and the zone init code to determine if we can safely pack and unpack
+ * pointers from the 2 ends of these spaces
+ */
+typedef uint32_t vm_page_packed_t;
+
+#define VM_PAGE_PACK_PTR(m) (!(m) ? (vm_page_packed_t)0 : ((vm_page_packed_t)((uintptr_t)(((uintptr_t)(m) - (uintptr_t) VM_MIN_KERNEL_AND_KEXT_ADDRESS)) >> 6)))
+#define VM_PAGE_UNPACK_PTR(p) (!(p) ? VM_PAGE_NULL : ((vm_page_t)((((uintptr_t)(p)) << 6) + (uintptr_t) VM_MIN_KERNEL_AND_KEXT_ADDRESS)))
+
+#else
+
+/*
+ * we can't do the packing trick on 32 bit architectures, so
+ * just turn the macros into noops.
+ */
+typedef struct vm_page *vm_page_packed_t;
+
+#define VM_PAGE_PACK_PTR(m) ((vm_page_packed_t)(m))
+#define VM_PAGE_UNPACK_PTR(p) ((vm_page_t)(p))
+
+#endif
+
+
struct vm_page {
queue_chain_t pageq; /* queue info for FIFO */
/* queue or free list (P) */
queue_chain_t listq; /* all pages in same object (O) */
- struct vm_page *next; /* VP bucket link (O) */
- vm_object_t object; /* which object am I in (O&P) */
vm_object_offset_t offset; /* offset into that object (O,P) */
+ vm_object_t object; /* which object am I in (O&P) */
+ vm_page_packed_t next_m; /* VP bucket link (O) */
/*
* The following word of flags is protected
* by the "page queues" lock.
* the free list (P) */
no_cache:1, /* page is not to be cached and should
* be reused ahead of other pages (P) */
- xpmapped:1,
- __unused_pageq_bits:2; /* 2 bits available here */
+
+ __unused_pageq_bits:3; /* 3 bits available here */
ppnum_t phys_page; /* Physical address of page, passed
* to pmap_enter (read-only) */
/* boolean_t */ busy:1, /* page is in transit (O) */
wanted:1, /* someone is waiting for page (O) */
tabled:1, /* page is in VP table (O) */
+ hashed:1, /* page is in vm_page_buckets[]
+ (O) + the bucket lock */
fictitious:1, /* Physical page doesn't exist (O) */
/*
- * IMPORTANT: the "pmapped" bit can be turned on while holding the
- * VM object "shared" lock. See vm_fault_enter().
- * This is OK as long as it's the only bit in this bit field that
- * can be updated without holding the VM object "exclusive" lock.
+ * IMPORTANT: the "pmapped", "xpmapped" and "clustered" bits can be modified while holding the
+ * VM object "shared" lock + the page lock provided through the pmap_lock_phys_page function.
+ * This is done in vm_fault_enter and the CONSUME_CLUSTERED macro.
+ * It's also ok to modify them behind just the VM object "exclusive" lock.
*/
+ clustered:1, /* page is not the faulted page (O) or (O-shared AND pmap_page) */
pmapped:1, /* page has been entered at some
- * point into a pmap (O **shared**) */
+ * point into a pmap (O) or (O-shared AND pmap_page) */
+ xpmapped:1, /* page has been entered with execute permission (O)
+ or (O-shared AND pmap_page) */
+
wpmapped:1, /* page has been entered at some
* point into a pmap for write (O) */
pageout:1, /* page wired & busy for pageout (O) */
cleaning:1, /* Page clean has begun (O) */
precious:1, /* Page is precious; data must be
* returned even if clean (O) */
- clustered:1, /* page is not the faulted page (O) */
overwriting:1, /* Request to unlock has been made
* without having data. (O)
* [See vm_fault_page_overwrite] */
reusable:1,
lopage:1,
slid:1,
- was_dirty:1, /* was this page previously dirty? */
compressor:1, /* page owned by compressor pool */
- __unused_object_bits:7; /* 7 bits available here */
-
-#if __LP64__
- unsigned int __unused_padding; /* Pad structure explicitly
- * to 8-byte multiple for LP64 */
-#endif
+ written_by_kernel:1, /* page was written by kernel (i.e. decompressed) */
+ __unused_object_bits:5; /* 5 bits available here */
};
#define DEBUG_ENCRYPTED_SWAP 1
extern unsigned int vm_page_pageable_internal_count;
extern unsigned int vm_page_pageable_external_count;
extern
+unsigned int vm_page_xpmapped_external_count; /* How many pages are mapped executable? */
+extern
unsigned int vm_page_external_count; /* How many pages are file-backed? */
extern
unsigned int vm_page_internal_count; /* How many pages are anonymous? */
vm_page_t page,
boolean_t remove_from_hash);
+#if CONFIG_IOSCHED
+extern wait_result_t vm_page_sleep(
+ vm_object_t object,
+ vm_page_t m,
+ int interruptible);
+#endif
+
+extern void vm_pressure_response(void);
+
#if CONFIG_JETSAM
extern void memorystatus_pages_update(unsigned int pages_avail);
#define VM_CHECK_MEMORYSTATUS do { \
memorystatus_pages_update( \
- vm_page_external_count + \
+ vm_page_pageable_external_count + \
vm_page_free_count + \
(VM_DYNAMIC_PAGING_ENABLED(memory_manager_default) ? 0 : vm_page_purgeable_count) \
); \
#else /* CONFIG_JETSAM */
-extern void vm_pressure_response(void);
-
#define VM_CHECK_MEMORYSTATUS vm_pressure_response()
(((m)->wanted = TRUE), \
assert_wait((event_t) (m), (interruptible)))
+#if CONFIG_IOSCHED
#define PAGE_SLEEP(o, m, interruptible) \
- (((m)->wanted = TRUE), \
- thread_sleep_vm_object((o), (m), (interruptible)))
+ vm_page_sleep(o, m, interruptible)
+#else
+#define PAGE_SLEEP(o, m, interruptible) \
+ (((m)->wanted = TRUE), \
+ thread_sleep_vm_object((o), (m), (interruptible)))
+#endif
#define PAGE_WAKEUP_DONE(m) \
MACRO_BEGIN \
boolean_t was_pageable; \
\
VM_PAGE_QUEUES_ASSERT(mem, 1); \
- assert(!mem->laundry); \
+ assert(!mem->pageout_queue); \
/* \
* if (mem->pageout_queue) \
* NOTE: VM_PAGE_QUEUES_REMOVE does not deal with removing pages from the pageout queue... \
#define VM_PAGE_CONSUME_CLUSTERED(mem) \
MACRO_BEGIN \
+ pmap_lock_phys_page(mem->phys_page); \
if (mem->clustered) { \
assert(mem->object); \
mem->object->pages_used++; \
mem->clustered = FALSE; \
VM_PAGE_SPECULATIVE_USED_ADD(); \
} \
+ pmap_unlock_phys_page(mem->phys_page); \
MACRO_END
+#define VM_PAGE_COUNT_AS_PAGEIN(mem) \
+ MACRO_BEGIN \
+ DTRACE_VM2(pgin, int, 1, (uint64_t *), NULL); \
+ current_task()->pageins++; \
+ if (mem->object->internal) { \
+ DTRACE_VM2(anonpgin, int, 1, (uint64_t *), NULL); \
+ } else { \
+ DTRACE_VM2(fspgin, int, 1, (uint64_t *), NULL); \
+ } \
+ MACRO_END
+
#define DW_vm_page_unwire 0x01
#define DW_vm_page_wire 0x02
#define DW_move_page 0x1000
#define DW_VM_PAGE_QUEUES_REMOVE 0x2000
#define DW_enqueue_cleaned 0x4000
+#define DW_vm_phantom_cache_update 0x8000
struct vm_page_delayed_work {
vm_page_t dw_m;
extern vm_page_t vm_object_page_grab(vm_object_t);
+#if VM_PAGE_BUCKETS_CHECK
+extern void vm_page_buckets_check(void);
+#endif /* VM_PAGE_BUCKETS_CHECK */
#endif /* _VM_VM_PAGE_H_ */
projects / apple / xnu.git / blobdiff