Re: [PATCH for-next V2 0/9] Add completion timestamping support

[Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>]

On 6/10/2015 4:26 AM, Christoph Lameter wrote:
>> >I have no problem with a bare metal interface exposing this.  But pretendin=
>> >g that it's generic and that this is the one and only way that this could b=
>> >e implemented doesn't make it so.
> This is a way it was implemented and its usable. Shooting for pie in the
> sky does not bring us anything. Nor ideas of requirements from a new
> experimental API that does not support the basic features that we need
> and seems to be on its way to mess up the latencies of access to RDMA operations.

Doug,

What's your maintainer say here?

The current proposal has:

1. raw HCA clock completion generation time-stamp for CQEs
2. HCA clock frequency in KHZ
3. mask telling how many bits are relevant from the 64bit time-stamp

This is fairly simple, practical and very much usable to FSI 
applications and users, and can be extended later if someone comes up 
with better/other combination of the frequency/mask. Have a GO?

Or.
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