kern/136470: Cannot mount / in read-only, over NFS

[Alex Keda]

>Number:         136470
>Category:       kern
>Synopsis:       Cannot mount / in read-only, over NFS
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jul 08 18:00:13 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Alex Keda
>Release:        7.2
>Organization:
USSR
>Environment:
FreeBSD a-ryabov.grand-prix 7.2-RELEASE-p2 FreeBSD 7.2-RELEASE-p2 #0: Thu Jul  2 15:37:28 UTC 2009     lissyara at router.local:/usr/obj/usr/src/sys/NFSBOOT  i386

>Description:
I have this settings (machine booting over PXE->NFS)

a-ryabov# grep root /etc/rc.conf
# rootfs in read-only
root_rw_mount="NO"
a-ryabov#  

a-ryabov# grep "ro " /etc/fstab
192.168.130.254:/shares/tftp/7.2/gp     /               nfs     ro 0 0
a-ryabov# 

But, after boot:
a-ryabov# mount | grep tftp
192.168.130.254:/shares/tftp/7.2/gp on / (nfs)

When I using 4.11 - all be OK - root fs mounted read-only
>How-To-Repeat:
boot over LAN (using PXE)
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: