Re: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics

[Dmitry Yusupov <dmitry_yus@xxxxxxxxx>]

On Thu, 2005-03-31 at 19:09 +0200, Andrea Arcangeli wrote:
> > Even with all that work it is  not the 100% solution some people on this 
> > thread
> > seem to be lusting for. 
> 
> I thought it was more than enough, all they care about is not to
> deadlock anymore, I don't think anybody cares about the performance of
> the deadlock-scenario.

True. this is all we need to make "soft" iSCSI viable alternative to FC.
Btw, other OSes can do that today.

> I agree with Jamal that his suggestion to use an high-per ring is
> very good (I didn't even know some card supported this feature), so if
> somebody wants the deadlock scenario not to run in "degraded mode", they
> will have to use some more advanced hardware the way Jamal is suggesting
> (or get rid of TCP all together and use TCP/IP offload with the security
> risks it introduces or RDMA or whatever other point to point high perf
> DMA technology like quadrix etc..).

One good example is Neterion 10Gbps card. It supports up to 8 priority
rings. Could someone point me to the API which driver could utilize to
configure ring's priorities with 2.6.x? Thanks.