Date: Sun, 9 Aug 2015 22:29:11 +0000 (UTC) From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r286559 - stable/9/sbin/umount Message-ID: <201508092229.t79MTBF7070338@repo.freebsd.org>
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Author: rmacklem Date: Sun Aug 9 22:29:10 2015 New Revision: 286559 URL: https://svnweb.freebsd.org/changeset/base/286559 Log: MFC: r284531 Document that a forced dismount of an NFSv3 mount when the NLM (rpc.lockd) is running can crash the system. Unfortunately this is not easy to fix, but I have left PR#200585 open. Modified: stable/9/sbin/umount/umount.8 Directory Properties: stable/9/sbin/umount/ (props changed) Modified: stable/9/sbin/umount/umount.8 ============================================================================== --- stable/9/sbin/umount/umount.8 Sun Aug 9 22:07:52 2015 (r286558) +++ stable/9/sbin/umount/umount.8 Sun Aug 9 22:29:10 2015 (r286559) @@ -28,7 +28,7 @@ .\" @(#)umount.8 8.2 (Berkeley) 5/8/95 .\" $FreeBSD$ .\" -.Dd May 31, 2011 +.Dd June 17, 2015 .Dt UMOUNT 8 .Os .Sh NAME @@ -81,6 +81,9 @@ The root file system cannot be forcibly For NFS, a forced dismount can take up to 1 minute or more to complete against an unresponsive server and may throw away data not yet written to the server for this case. +Also, doing a forced dismount of an NFSv3 mount when +.Xr rpc.lockd 8 +is running is unsafe and can result in a crash. .It Fl h Ar host Only file systems mounted from the specified host will be unmounted.
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