summaryrefslogtreecommitdiffstats
path: root/sys/vm/vm_page.h
diff options
context:
space:
mode:
Diffstat (limited to 'sys/vm/vm_page.h')
-rw-r--r--sys/vm/vm_page.h38
1 files changed, 31 insertions, 7 deletions
diff --git a/sys/vm/vm_page.h b/sys/vm/vm_page.h
index 4bb6034..da7fd89 100644
--- a/sys/vm/vm_page.h
+++ b/sys/vm/vm_page.h
@@ -235,20 +235,22 @@ extern struct vpglocks pa_lock[];
#endif
#define vm_page_queue_free_mtx vm_page_queue_free_lock.data
+
/*
* These are the flags defined for vm_page.
*
- * aflags are updated by atomic accesses. Use the vm_page_aflag_set()
+ * aflags are updated by atomic accesses. Use the vm_page_aflag_set()
* and vm_page_aflag_clear() functions to set and clear the flags.
*
* PGA_REFERENCED may be cleared only if the object containing the page is
- * locked.
+ * locked. It is set by both the MI and MD VM layers.
*
* PGA_WRITEABLE is set exclusively on managed pages by pmap_enter(). When it
- * does so, the page must be VPO_BUSY.
+ * does so, the page must be VPO_BUSY. The MI VM layer must never access this
+ * flag directly. Instead, it should call pmap_page_is_write_mapped().
*
* PGA_EXECUTABLE may be set by pmap routines, and indicates that a page has
- * at least one executable mapping. It is not consumed by the VM layer.
+ * at least one executable mapping. It is not consumed by the MI VM layer.
*/
#define PGA_WRITEABLE 0x01 /* page may be mapped writeable */
#define PGA_REFERENCED 0x02 /* page has been referenced */
@@ -260,12 +262,12 @@ extern struct vpglocks pa_lock[];
*/
#define PG_CACHED 0x01 /* page is cached */
#define PG_FREE 0x02 /* page is free */
-#define PG_FICTITIOUS 0x04 /* physical page doesn't exist (O) */
+#define PG_FICTITIOUS 0x04 /* physical page doesn't exist */
#define PG_ZERO 0x08 /* page is zeroed */
#define PG_MARKER 0x10 /* special queue marker page */
#define PG_SLAB 0x20 /* object pointer is actually a slab */
#define PG_WINATCFLS 0x40 /* flush dirty page on inactive q */
-#define PG_NODUMP 0x80 /* don't include this page in the dump */
+#define PG_NODUMP 0x80 /* don't include this page in a dump */
/*
* Misc constants.
@@ -356,7 +358,6 @@ void vm_page_hold(vm_page_t mem);
void vm_page_unhold(vm_page_t mem);
void vm_page_free(vm_page_t m);
void vm_page_free_zero(vm_page_t m);
-void vm_page_dirty(vm_page_t m);
void vm_page_wakeup(vm_page_t m);
void vm_pageq_remove(vm_page_t m);
@@ -408,6 +409,7 @@ void vm_page_cowfault (vm_page_t);
int vm_page_cowsetup(vm_page_t);
void vm_page_cowclear (vm_page_t);
+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_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);
@@ -423,6 +425,28 @@ void vm_page_object_lock_assert(vm_page_t m);
#endif
/*
+ * vm_page_dirty:
+ *
+ * Set all bits in the page's dirty field.
+ *
+ * The object containing the specified page must be locked if the
+ * call is made from the machine-independent layer.
+ *
+ * See vm_page_clear_dirty_mask().
+ */
+static __inline void
+vm_page_dirty(vm_page_t m)
+{
+
+ /* Use vm_page_dirty_KBI() under INVARIANTS to save memory. */
+#if defined(KLD_MODULE) || defined(INVARIANTS)
+ vm_page_dirty_KBI(m);
+#else
+ m->dirty = VM_PAGE_BITS_ALL;
+#endif
+}
+
+/*
* vm_page_sleep_if_busy:
*
* Sleep and release the page queues lock if VPO_BUSY is set or,
OpenPOWER on IntegriCloud