Re: bug in md write barrier support?

[Jens Axboe]

On Thu, Sep 09 2004, Arjan van de Ven wrote:
> 
> > 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.

Depends on your angle, I think it breaks the principle of least
surprise.

-- 
Jens Axboe

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