Date: Mon, 06 May 2013 23:58:28 +0200 From: "O. Hartmann" <ohartman@zedat.fu-berlin.de> To: Navdeep Parhar <nparhar@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: multiple NFS mounts with bg,retrycount=0 Message-ID: <1367877508.2552.12.camel@thor.walstatt.dyndns.org> In-Reply-To: <5187ECE6.2030205@gmail.com> References: <5187ECE6.2030205@gmail.com>
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[-- Attachment #1 --] On Mon, 2013-05-06 at 10:48 -0700, Navdeep Parhar wrote: > I updated a FreeBSD 9-STABLE system to r250290 and noticed an NFS oddity > -- fstab entries that specify a retrycnt are mounted multiple times. > > I have this in /etc/fstab: > xxxx:/remote/yyyy /local/zzzz nfs rw,bg,retrycnt=0 0 0 > > And this in /etc/rc.conf: > rpcbind_enable="YES" > nfs_client_enable="YES" > nfs_server_enable="YES" > nfsv4_server_enable="YES" > nfsuserd_flags="-domain XXXXXX" > rpc_lockd_enable="YES" > rpc_statd_enable="YES" > > If I run mount immediately after the system boots up I don't see > anything mounted on /local/zzzz. If I wait a minute or so and recheck I > see two identical mounts on /local/zzzz. > > # mount | grep /local > xxxx:/remote/yyyy on /local/zzzz (nfs) > xxxx:/remote/yyyy on /local/zzzz (nfs) > > It is almost as if the system tried to mount the remote FS, failed, and > then forked multiple (?) processes to retry the operation, and all of > them succeed later. Unfortunately, I can't reboot the system for a > couple of days so I can't go looking for mount_nfs processes right after > a fresh boot. > > Regards, > Navdeep I see the very same here on FreeBSD 10.0-CURRENT boxes (two boxes acting as NFSv4 server). The clients (all FBSD 10, one 9.1-STABLE) have two(!) identical mounts of the very same filesystem. /etc/fstab does contain the mount option "bg", but not "retrycnt=0". This behaviour happens on ALL FBSD 10.0-CURRENT boxes I administer (10.0-CURRENT #0 r250275: Sun May 5 18:40:17 CEST 2013 amd64). Regards, Oliver [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (FreeBSD) iQEcBAABAgAGBQJRiCd/AAoJEOgBcD7A/5N8Fw4H/1KAm5Mfc1VUzmCQdvbKychW 6ErqU8gjL67YTGVheCJXC/6pCyQ3eKSzzoXclQIMgysqwdNMNbC5K7Ad/bvgM0Mt +WLhd1WMSKIKr6/KRFwRU8Kc1c+blEZffdMi7eq0lQtKmHrgyKLX7uklGROUylui TSGmv6/5mxcthIGQBdehptpuVeswJAr6piTzNUZGyVU68JKM58WZflRzwOTyN0pP hFfrY1xOlZxGoPGJ4AFX9lZLWY/VU/lcsfA/h6g/m+DSk9h58PgOcQ0dDdvp7diz Sh10kA60vOIdD+7m3k5Hp0B+8bY5778tXCrNKf2nU7lIo8JzAsPLjkczRlkLN68= =164N -----END PGP SIGNATURE-----
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