From owner-freebsd-hardware  Sat Nov 16 14:56:17 1996
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Date: Sun, 17 Nov 1996 09:52:20 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199611162252.JAA30586@godzilla.zeta.org.au>
To: mango@staff.communique.net, phk@critter.tfs.com
Subject: Re: kernel optimization and PCI ...
Cc: freebsd-hardware@freefall.freebsd.org
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>Doing a df forces all metadate to be written, that takes time.  Watch
>with systat(1) and you can see it happen.

It does?  Where?  ffs_statfs seems to just copy some data.  df does a
full sync for non-mounted file systems.

Bruce