> On Aug 24, 2016, at 11:43 PM, Dong Young Yoon <dyoon@xxxxxxxxx> wrote: > > Hi, > > My name is Dong Young and I am a PhD student at the University of Michigan. > Recently, we have been working on a research topic related to RDMA and had an observation where there is a race condition between RDMA atomic operations (e.g., fetch-and-add) and RDMA 1-sided writes. > We would like to verity whether what we observed is actually true (i.e., no atomicity guaranteed between RDMA atomic operation and RDMA read/write). Hi Dong, If you post an atomic operation followed by RDMA read/write, you need a fence between the two, because the second one might start processing before the first one has completed processing. In order to do that, you need to set the IBV_SEND_FENCE in the send_flags of the wr. > Is it really true? I have also contacted other fellow researchers who worked on RDMA, but they do not seem to be 100% sure on this matter. > Thank you so much in advance for your help. > > Thanks, > Dong Young-- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > 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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
