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This > means that even if the user wanted to, they could never use a remote NIC > without also having memory on that NIC's socket. > > For example, if we change examples/skeleton/basicfwd.c to have > SOCKET_ID_ANY as the socket_id parameter for Rx and Tx rings, we should > be able to run the app cross-numa e.g. as below, where the two PCI > devices are on socket 1, and core 1 is on socket 0: > > ./build/examples/dpdk-skeleton -l 1 --legacy-mem --socket-mem=1024,0 \ > -a a8:00.0 -a b8:00.0 > > This fails however, with the error: > > ETHDEV: failed to allocate private data > PCI_BUS: Requested device 0000:a8:00.0 cannot be used > > We can remove this restriction by doing a fallback call to general > rte_malloc after a call to rte_malloc_socket fails. This should be safe > to do because the later ethdev calls to setup Rx/Tx queues all take a > socket_id parameter, which can be used by applications to enforce the > requirement for local-only memory for a device, if so desired. [If > device-local memory is present it will be used as before, while if not > present the rte_eth_dev_configure call will now pass, but the subsequent > queue setup calls requesting local memory will fail]. > > Fixes: e489007a411c ("ethdev: add generic create/destroy ethdev APIs") > Fixes: dcd5c8112bc3 ("ethdev: add PCI driver helpers") > Cc: stable@dpdk.org > > Signed-off-by: Bruce Richardson > Signed-off-by: Padraig Connolly > Reviewed-by: Ferruh Yigit Applied to dpdk-next-net/main, thanks.