bin/151321: mount_nfs won't recognize readahead

[Simon Walton]

>Number:         151321
>Category:       bin
>Synopsis:       mount_nfs won't recognize readahead
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Oct 08 19:10:04 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Simon Walton
>Release:        8.1
>Organization:
>Environment:
FreeBSD mongo 8.1-RELEASE FreeBSD 8.1-RELEASE #1: Thu Oct  7 18:25:36 PDT 2010
>Description:
Mount_nfs won't recognize any form of the readahead parameter:

mongo# mount_nfs -a 2 m-6:/mnt/dodo /cdrom
-a deprecated, use -o readhead=<value>
mount_nfs: /cdrom, mount option <readahead> is unknown: Invalid argument
mongo# mount_nfs -o readahead=2 m-6:/mnt/dodo /cdrom
mount_nfs: /cdrom, mount option <readahead> is unknown: Invalid argument
mongo# mount_nfs -o readhead=2 m-6:/mnt/dodo /cdrom
mount_nfs: /cdrom, mount option <readhead> is unknown: Invalid argument

The mount operation is unsuccessful in all cases.

In previous releases this option was a significant performance increase
for us.

>How-To-Repeat:
mount_nfs -o readahead=2 ...

>Fix:


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