On Fri, 19 Feb 1999, Erik E. Fair wrote:

> Out of curiosity, what additional "modify" operations will still be
> permitted with the vnode unlocked? Or will they block on the vnode's return
> from the backing store like the original operation that caused the fetch
> from store in the first place?

Any modify operation which exclusivly touches resident data will be
permitted to proceed.

This behavior will have the effect of possibly re-ordering operations, but
since the kernel doesn't guarantee the ordering anyway, we're fine.

Take care,

Bill