Hi Kefu, For RCU, I get the following facts, 1. For readers, no block, and support multiple readers concurrently. 2. For writers, it is blocked until all readers go out of reader-side critical session. If there are multiple concurrent writers need spin lock to synchronize all the writers. Are there multi concurrent writers for config or OSDMap? Do you think it is acceptable in seastar version since need spin lock for multiple concurrent writers? Thanks! -Chunmei -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
