Rustad, Mark D <mark.d.rus...@intel.com> wrote: > > > Mike, Just to make sure I understand the context, DCB vlan ID + pbits > > and a like setting is targeted for iscsi HW offloads, correct? > > It really isn't targeted for iscsi HW offloads. In fact I don't think there > is any connection at all. It is about honoring the iscsi application > priority established by DCB, whether offloaded or not. >
Mark (added the list), When you say "iscsi application priority" does this eventually should result in the 8021q priority bits set for iscsi sessions or its priority in some other/higher level which relates to DCB/ETS? > > The lldpad daemon processes the LLDP protocol to negotiate DCB settings. It > then communicates the settings down to the drivers, which expose them via > netlink. iscsid accesses that information via netlink to establish a > priority setting when iscsi sessions are created. > When you say "drivers" I assume you refer to the network/ethernet drivers, correct? > As you can see from the description above, the iscsi kernel code plays no > role in setting or controlling the priority. Right now it is all done by > iscsid based on information that it receives from the kernel. > So in high level, how iscsid acts to form that priority for the iscsi session? is it through invoking some setsockopt (e.g SO_PRIORITY or IP_TOS) before handing the iscsi tcp socket to the kernel? > What sort of support are you looking for? > > I'm looking for a way to specify a vlan priority for an iSER (iSCSI RDMA) session for the case of using iser in conjunction with IBoE (Infiniband over Ethernet), unlike the case of iscsi/tcp, the iser session is established from within the kernel under the directive of iscsid. What I can do is patch the iscsi code to deliver trough the iscsi netlink user/kernel comm a priority which it can get from the local 8021q device egress mapping or from DCB. Or. Or. -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to firstname.lastname@example.org. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.