2014-09-20 8:24 GMT+02:00 Bart Van Assche <[email protected]>: > > On 09/19/14 18:04, Jinpu Wang wrote: >> >> Another question, in srp_map_finish_fmr, the desc va is set to 0, >> could you point me how SRP protect multiple rdma operation write to >> same addr? or different fmr-rkey will protect this? > > > Hello Jack, > > As you can see in srpt_map_sg_to_ib_sge() in the SRP target driver the > virtual address (db->va) and rkey (db->key) are always used in combination - > the virtual address is never used alone. Please note that this not only holds > for FMR but also for FR. More information can be found in paragraph "10.6.2 > MEMORY REGISTRATION" in the InfiniBand Architecture Specification. > > Bart. >
Hello Bart, Thanks for your informative reply, I will go through InfiniBand Architecture Spec to understand memory registration better. Have a nice weekend! Jack > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
