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From: Ivan Voras <ivoras@FreeBSD.org>
Date: Tue, 2 Mar 2010 23:57:42 +0000 (UTC)
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Subject: svn commit: r204611 - in head/sys: kern sys
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Author: ivoras
Date: Tue Mar  2 23:57:42 2010
New Revision: 204611
URL: http://svn.freebsd.org/changeset/base/204611

Log:
  Document the VM detection type and sysctl a bit better.

Modified:
  head/sys/kern/subr_param.c
  head/sys/sys/systm.h

Modified: head/sys/kern/subr_param.c
==============================================================================
--- head/sys/kern/subr_param.c	Tue Mar  2 23:53:38 2010	(r204610)
+++ head/sys/kern/subr_param.c	Tue Mar  2 23:57:42 2010	(r204611)
@@ -124,7 +124,7 @@ SYSCTL_ULONG(_kern, OID_AUTO, sgrowsiz, 
     "Amount to grow stack on a stack fault");
 SYSCTL_PROC(_kern, OID_AUTO, vm_guest, CTLFLAG_RD | CTLTYPE_STRING,
     NULL, 0, sysctl_kern_vm_guest, "A",
-    "Virtual machine detected? (none|generic|xen)");
+    "Virtual machine guest detected? (none|generic|xen)");
 
 /*
  * These have to be allocated somewhere; allocating

Modified: head/sys/sys/systm.h
==============================================================================
--- head/sys/sys/systm.h	Tue Mar  2 23:53:38 2010	(r204610)
+++ head/sys/sys/systm.h	Tue Mar  2 23:57:42 2010	(r204611)
@@ -65,6 +65,9 @@ extern int maxusers;		/* system tune hin
 extern int ngroups_max;		/* max # of supplemental groups */
 extern int vm_guest;		/* Running as virtual machine guest? */
 
+/* Detected virtual machine guest types. The intention is to expand
+ * and/or add to the VM_GUEST_VM type if specific VM functionality is
+ * ever implemented (e.g. vendor-specific paravirtualization features). */
 enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN };
 
 #ifdef	INVARIANTS		/* The option is always available */