From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brean Subject: strong ordering for data registered memory Date: Tue, 10 Nov 2009 15:19:26 -0500 Message-ID: <4AF9CACE.8070700@Sun.COM> Mime-Version: 1.0 Content-Type: text/plain; CHARSET=US-ASCII; format=flowed Content-Transfer-Encoding: 7BIT Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-rdma List-Id: linux-rdma@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 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html