Synchronous mount vs NFS exported

[Dmitry Morozovsky]

On Sat, 23 Sep 2006, Dmitry Pryanishnikov wrote:

DP>   I've noticed a strange interdependency between FS mount options (RELENG_6
DP> as of 20-Aug). I'm using "rw,sync" options in my /etc/fstab for the root
DP> partition. W/o NFS export of it, 'mount' output looks good:
DP> 
DP> /dev/ad0s4a on / (ufs, local, synchronous)
DP> 
DP> However, when I export this partition with "-alldirs -ro" options, mount
DP> stops to show "synchronous":
DP> 
DP> /dev/ad0s4a on / (ufs, NFS exported, local)
DP> 
DP> Is it just a bug in 'mount' output, or is "synchronous" option indeed
DP> silently removed during the NFS export of FS?

I did notice disappearing noatime option after NFS exporting, but did not dig 
it enough no find the source and impacts.

Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
------------------------------------------------------------------------