Author: rmacklem Date: Wed May 1 22:50:45 2013 New Revision: 250162 URL: http://svnweb.freebsd.org/changeset/base/250162
Log: Document the fact that an NFSv4 mount against a volume on the same host can result in a hung NFS server and is not recommended. This is a content change. MFC after: 2 weeks Modified: head/usr.sbin/nfsd/nfsv4.4 Modified: head/usr.sbin/nfsd/nfsv4.4 ============================================================================== --- head/usr.sbin/nfsd/nfsv4.4 Wed May 1 22:47:47 2013 (r250161) +++ head/usr.sbin/nfsd/nfsv4.4 Wed May 1 22:50:45 2013 (r250162) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 23, 2012 +.Dd May 1, 2013 .Dt NFSV4 4 .Os .Sh NAME @@ -287,6 +287,13 @@ and daemons at boot time via the ``nfsuserd_flags'' and ``nfscbd_flags'' .Xr rc.conf 5 variables. +.Pp +NFSv4 mount(s) against exported volume(s) on the same host are not recommended, +since this can result in a hung NFS server. +It occurs when an nfsd thread tries to do an NFSv4 VOP_RECLAIM()/Close RPC +as part of acquiring a new vnode. +If all other nfsd threads are blocked waiting for lock(s) held by this nfsd +thread, then there isn't an nfsd thread to service the Close RPC. .Sh FILES .Bl -tag -width /var/db/nfs-stablerestart.bak -compact .It Pa /var/db/nfs-stablerestart _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
