Outstanding I/O after 10 seconds

[Poul-Henning Kamp]

In message <20040924171245.Q549 at pcle2.cc.univie.ac.at>, Lukas Ertl writes:
>Hi there,
>
>I've now seen several times the following messages:
>
>WARNING: Final close of geom_dev(da9s1a) still has outstanding I/O after 
>10 seconds. Completing close anyway, panic may happen later.
>
>This happens when I run benchmarks on the specified device (like rawio). 
>The strange thing is that when I look at what triggers this message, then 
>cp->nstart is one less than cp->nend, like there was an additional 
>g_io_deliver() on a bio.
>
>Any ideas why cp->nend would be larger than cp->nstart?

A bug.  A very serious bug.  Likely a double biodone().

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