On Tue, 17 Aug 1999, Michael Hancock wrote:
> As I recall most of FBSD's default routines are also error routines, if
> the exceptions were a problem it would would be trivial to fix.
>
> I think fixing resource allocation/deallocation for things like vnodes,
> cnbufs, and locks are a higher priority for now. There are examples such
> as in detached threading where it might make sense for the detached child
> to be responsible for releasing resources allocated to it by the parent,
> but in stacking this model is very messy and unnatural. This is why the
> purpose of VOP_ABORTOP appears to be to release cnbufs but this is really
> just an ugly side effect. With stacking the code that allocates should be
> the code that deallocates. Substitute, "code" with "layer" to be more
> correct.
>
> I fixed a lot of the vnode and locking cases, unfortunately the ones that
> remain are probably ugly cases where you have to reacquire locks that had
> to be unlocked somewhere in the executing layer. See VOP_RENAME for an
> example. Compare the number of WILLRELEs in vnode_if.src in FreeBSD and
> NetBSD, ideally there'd be none.
I've compared the two, and making the NetBSD number match the FreeBSD
number is one of my goals. :-)
Any suggestions, or just plod&fix?
Take care,
Bill
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