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From: Ivan Voras <ivoras@FreeBSD.org>
Date: Mon, 2 Nov 2009 16:56:59 +0000 (UTC)
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Subject: svn commit: r198811 - head/sys/vm
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Author: ivoras
Date: Mon Nov  2 16:56:59 2009
New Revision: 198811
URL: http://svn.freebsd.org/changeset/base/198811

Log:
  Add sysctl documentation strings. The descriptions are derived
  from tuning(7). One of the descriptions references tuning(7) because
  it is too complex to adequatly describe here (it is not a simple
  boolean sysctl) and users should be warned to that.
  
  Reviewed by:	alc, kib
  Approved by:	gnn (mentor)

Modified:
  head/sys/vm/swap_pager.c

Modified: head/sys/vm/swap_pager.c
==============================================================================
--- head/sys/vm/swap_pager.c	Mon Nov  2 16:55:33 2009	(r198810)
+++ head/sys/vm/swap_pager.c	Mon Nov  2 16:56:59 2009	(r198811)
@@ -155,11 +155,15 @@ int swap_pager_avail;
 static int swdev_syscall_active = 0; /* serialize swap(on|off) */
 
 static vm_ooffset_t swap_total;
-SYSCTL_QUAD(_vm, OID_AUTO, swap_total, CTLFLAG_RD, &swap_total, 0, "");
+SYSCTL_QUAD(_vm, OID_AUTO, swap_total, CTLFLAG_RD, &swap_total, 0, 
+    "Total amount of available swap storage.");
 static vm_ooffset_t swap_reserved;
-SYSCTL_QUAD(_vm, OID_AUTO, swap_reserved, CTLFLAG_RD, &swap_reserved, 0, "");
+SYSCTL_QUAD(_vm, OID_AUTO, swap_reserved, CTLFLAG_RD, &swap_reserved, 0, 
+    "Amount of swap storage needed to back all allocated anonymous memory.");
 static int overcommit = 0;
-SYSCTL_INT(_vm, OID_AUTO, overcommit, CTLFLAG_RW, &overcommit, 0, "");
+SYSCTL_INT(_vm, OID_AUTO, overcommit, CTLFLAG_RW, &overcommit, 0, 
+    "Configure virtual memory overcommit behavior. See tuning(7) "
+    "for details.");
 
 /* bits from overcommit */
 #define	SWAP_RESERVE_FORCE_ON		(1 << 0)