[mpich2-dev] [Fwd: strong ordering for data registered memory]

[Terry Dontje]

Forgive me if this is the wrong email alias to send this email, please 
direct me to the correct alias if this isn't the right one.

Sun's IB group has asked me to forward the following email to MPI 
implementors to see if anyone have any comments on this email.

thanks,

--td
> Subject:
> strong ordering for data registered memory
> From:
> David Brean <David.Brean at Sun.COM>
> Date:
> Tue, 10 Nov 2009 15:19:26 -0500
>
> To:
> linux-rdma <linux-rdma at vger.kernel.org>
>
>
> Some time ago there was an email sent to this group with the subject 
> "weak ordering for data registered memory".  I don't recall any action 
> resulting from this thread.  So, I have a question.  If a bit were 
> defined to specify "strong ordering", perhaps as a "access" flag (see 
> ibv_access_flags) and used with ibv_reg_mr(), would that be sufficient 
> for (1) client applications that need a HW "guarantee" of writing the 
> last byte of an RDMA last and (2) platform implementations that need 
> to deliver that feature?
>
> -David
>
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