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3d0130cbcc
It turns out that calling virNodeGetCPUMap(conn, NULL, NULL, 0) is both useful, and with Viktor's patches, common enough to optimize. Since this interface hasn't been released yet, we can change the RPC call. A bit more background on the optimization - learning the cpu count is a single file read (/sys/devices/system/cpu/possible), but learning the number of online cpus can possibly trigger a file read per cpu, depending on the age of the kernel, and all wasted if the caller passed NULL for both arguments. * src/nodeinfo.c (nodeGetCPUMap): Avoid bitmap when not needed. * src/remote/remote_protocol.x (remote_node_get_cpu_map_args): Supply two separate flags for needed arguments. * src/remote/remote_driver.c (remoteNodeGetCPUMap): Update caller. * daemon/remote.c (remoteDispatchNodeGetCPUMap): Likewise. * src/remote_protocol-structs: Regenerate.