Export a list of VM objects in the system via a sysctl. The list can be

examined via 'vmstat -o'.  It can be used to determine which files are
using physical pages of memory and how much each is using.

Differential Revision:	https://reviews.freebsd.org/D2277
Reviewed by:	alc, kib
MFC after:	2 weeks
Sponsored by:	Norse Corp, Inc. (forward porting to HEAD/10)

1 files changed, 21 insertions, 0 deletions

diff --git a/sys/sys/user.h b/sys/sys/user.h
index c3b3bc5..e831a37 100644
--- a/sys/sys/user.h
+++ b/sys/sys/user.h
@@ -486,6 +486,27 @@ struct kinfo_vmentry {
 };
 
 /*
+ * The "vm.objects" sysctl provides a list of all VM objects in the system
+ * via an array of these entries.
+ */
+struct kinfo_vmobject {
+	int	kvo_structsize;			/* Variable size of record. */
+	int	kvo_type;			/* Object type: KVME_TYPE_*. */
+	uint64_t kvo_size;			/* Object size in pages. */
+	uint64_t kvo_vn_fileid;			/* inode number if vnode. */
+	uint32_t kvo_vn_fsid;			/* dev_t of vnode location. */
+	int	kvo_ref_count;			/* Reference count. */
+	int	kvo_shadow_count;		/* Shadow count. */
+	int	kvo_memattr;			/* Memory attribute. */
+	uint64_t kvo_resident;			/* Number of resident pages. */
+	uint64_t kvo_active;			/* Number of active pages. */
+	uint64_t kvo_inactive;			/* Number of inactive pages. */
+	uint64_t _kvo_qspare[8];
+	uint32_t _kvo_ispare[8];
+	char	kvo_path[PATH_MAX];		/* Pathname, if any. */
+};
+
+/*
  * The KERN_PROC_KSTACK sysctl allows a process to dump the kernel stacks of
  * another process as a series of entries.  Each stack is represented by a
  * series of symbol names and offsets as generated by stack_sbuf_print(9).