Re: bug in md write barrier support?

[Arjan van de Ven]

> Precisely, it's always possible to just drop queueing depth to zero at
> that point. If I2O really does reorder around the cache flush (this
> seems broken...),

why does this seem broken? semantics of "cache flush guarantees that all
io submitted prior to it hits the spindle" are quite sane imo; no
guarantee of later submitted IO.. compare the unix "sync" command; same
level of semantics.

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