Re: [linux-usb-devel] Re: RFC: [2.6 patch] let BLK_DEV_UB depend on EMBEDDED

From: David Brownell
Date: Mon Dec 20 2004 - 11:09:05 EST

On Sunday 19 December 2004 11:06 pm, Pete Zaitcev wrote:
> On Sun, 19 Dec 2004 22:43:05 -0800, David Brownell <david-b@xxxxxxxxxxx> wrote:
> > It also seems to mean significantly slower access (at high speed)
> > for the most standard devices. That doesn't seem like a win,
> > though I suspect fixing it should be as simple as switching over
> > to use the USB scatterlist calls (which usb-storage uses) ...
> They do not allow asynchronous operation, last time I checked.

You could add an async mode ... heck, even the hack of dedicating
a kernel thread to that task ("psuedo-async" within "ub") would
give much more reasonable throughput.

- Dave
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