Re: [PATCH] Speed up the cdrw packet writing driver

[Andrew Morton]

Peter Osterlund <petero2@xxxxxxxxx> wrote:
>
> > Are you saying that your requests are so huge that each one has 1000 BIOs? 
> > That would be odd, for an IDE interface.
> 
> No, the thing is that the packet driver doesn't create requests at
> all. It stuffs incoming bio's in the rbtree, then the worker thread
> collects bio's from the rbtree for the same "zone" on the disc (each
> zone is 64kb on a CDRW and 32KB on a DVD). The driver then creates a
> new bio with the same size as the zone size and submits it to the real
> CD/DVD device.

Good lord.  I assume there's a good reason for this?
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