some comments on ffs sysctls, mainly dirhash

1 files changed, 17 insertions, 1 deletions

diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3
index 4761c1e645c..0c9a91579b7 100644
--- a/lib/libc/gen/sysctl.3
+++ b/lib/libc/gen/sysctl.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sysctl.3,v 1.123 2004/01/08 11:01:17 jmc Exp $
+.\"	$OpenBSD: sysctl.3,v 1.124 2004/01/12 03:45:46 tedu Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -1795,6 +1795,22 @@ Some filesystems may contain settings.
 .It Dv FFS_SD_TICKDELAY No "	integer	yes"
 .It Dv FFS_SD_WORKLIST_PUSH No "	integer	yes"
 .El
+.Bl -tag -width "123456"
+.It Dv FFS_CLUSTERREAD
+Enable combining multiple reads into one request to improve performance.
+.It Dv FFS_CLUSTERWRITE
+Enable combining multiple writes into one request.
+.It Dv FFS_DIRHASH_DIRSIZE
+The minimum size of a directory, in bytes, before it is considered or hashing.
+.It Dv FFS_DIRHASH_MAXMEM
+The maximum amount of memory, in bytes, to be used for storing directory
+hashes.
+.It Dv FFS_DIRHASH_MEM
+The amount of memory currently used by all directory hashes.
+.It Dv FFS_REALLOCBLOCKS
+When enabled, the kernel will attempt to relocate growing files so that they
+are contiguous on disk, reducing fragmentation.
+.El
 .It nfs
 .Bl -column "Third level nameXXX" "struct loadavgXXX" -offset ind
 .It Sy Third level name	Type	Changeable