Hi Herbert.
On Fri, Jun 22, 2007 at 03:28:44PM +0800, Herbert Xu ([EMAIL PROTECTED]) wrote:
> > + * Actually I need to think about how to handle the case, when queue is
> > full.
> > + * So far error (-EINVAL) is returned.
> > + */
>
> OK you need to provide a software queue here. Since you already
> have a hardware queue, you may choose to have a queue with a
> (advisory) maximum length of zero. However, a queue is still
> necessary since requests with the MAY_BACKLOG flag must never
> be discarded.
>
> This is (or will be) used by users such as dm-crypt that must be
> able to add at least one request but can throttle themselves
> afterwards .
What will prevent crypto user from filling that queue with crypto
requests more and more when hardware is not capable to work with such
rate?
--
Evgeniy Polyakov
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