On Fri, Sep 18, 2015 at 02:27:12PM +0000, Porosanu Alexandru wrote: > > Well, the HW has less than the whole RAM for backlogging requests, it has the # of available backlogging requests slots. > Then it will start dropping, just like in the out-of-mem case. OK I think that's where our misunderstanding is. For a backlogged request you do not give it to the hardware immediately. In fact a request should only be backlogged when the hardware queue is completely full. It should stay in a software queue until the hardware has space for it. When that happens you move it onto the hardware queue and invoke the completion function with err set to -EINPROGRESS. This tells the caller to enqueue that it may enqueue more requests. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- 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
