Orangefs: and adjustment and a fix

If it is not too late for these... the readahead adjustment
was suggested by Matthew Wilcox and looks like how I should
have written it in the first place... the "df fix" was
suggested by Walt Ligon, some Orangefs users have been complaining
about whacky df output...
orangefs: fix orangefs df output.

Complaints about nonsensical orangefs df output prompted Walt Ligon
to send me this change...

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
1 file changed