Date: Sun, 8 Dec 2013 00:59:05 +0000 (UTC) From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r259089 - head/sbin/mount_nfs Message-ID: <201312080059.rB80x50a008668@svn.freebsd.org>
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Author: rmacklem Date: Sun Dec 8 00:59:04 2013 New Revision: 259089 URL: http://svnweb.freebsd.org/changeset/base/259089 Log: Document the noncontigwr NFS mount option. This is a content change. MFC after: 3 weeks Modified: head/sbin/mount_nfs/mount_nfs.8 Modified: head/sbin/mount_nfs/mount_nfs.8 ============================================================================== --- head/sbin/mount_nfs/mount_nfs.8 Sun Dec 8 00:08:03 2013 (r259088) +++ head/sbin/mount_nfs/mount_nfs.8 Sun Dec 8 00:59:04 2013 (r259089) @@ -28,7 +28,7 @@ .\" @(#)mount_nfs.8 8.3 (Berkeley) 3/29/95 .\" $FreeBSD$ .\" -.Dd July 8, 2013 +.Dd December 7, 2013 .Dt MOUNT_NFS 8 .Os .Sh NAME @@ -257,6 +257,19 @@ servers on the client. Note that this option will only be honored when performing the initial mount, it will be silently ignored if used while updating the mount options. +.It Cm noncontigwr +This mount option allows the NFS client to +combine non-contiguous byte ranges being written +such that the dirty byte range becomes a superset of the bytes +that are dirty. +This reduces the number of writes significantly for software +builds. +The merging of byte ranges isn't done if the file has been file +locked, since most applications modifying a file from multiple +clients will use file locking. +As such, this option could result in a corrupted file for the +rare case of an application modifying the file from multiple +clients concurrently without using file locking. .It Cm principal For the RPCSEC_GSS security flavors, such as krb5, krb5i and krb5p, this option sets the name of the host based principal name expected
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