Hi Herbert. On Fri, Jun 22, 2007 at 03:28:44PM +0800, Herbert Xu (herbert@xxxxxxxxxxxxxxxxxxx) 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 - To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
