On Wed, May 10, 2017 at 5:45 PM, Mike Snitzer <snitzer@xxxxxxxxxx> wrote: > On Wed, May 10 2017 at 9:37am -0400, > Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx> wrote: > >> On Wed, May 10, 2017 at 11:49 AM, Neeraj Soni <neersoni@xxxxxxxxxxxxxx> wrote: >> > Hi Keith, >> > >> > Request based dm (dm-req-crypt) is being used for Disk Encryption solution >> > in Android used by Google. Also as i mentioned reverting this fix improves >> > the RR/RW numbers so this proves the request based dm is coming into path >> > and is being used. >> >> Sadly, that is an out of tree module. >> >> Does it still use Qcom specific APIs in its implementation (qcrypto_* funcs)? >> It did the last time I've checked - and the driver that implements >> those is not upstream either... >> >> It makes it difficult to help - which is a shame since I am interested >> in enabling higher performance >> of dm-crypt when using HW based crypto transformation myself. > > I have absolutely no interest in request-based dm-crypt. It is a hack > to work-around limitations in crypto IV generation. I agree. This is why I've said I'm interested in a high performance dm-crypt, not "request based dm-crypt". They are trying to solve the same problem but with the wrong solution and doing so out of upstream. As the parlance of our time seems to go... sad. :-) Cheers, Gilad -- Gilad Ben-Yossef Chief Coffee Drinker "If you take a class in large-scale robotics, can you end up in a situation where the homework eats your dog?" -- Jean-Baptiste Queru
