From: Christoph Hellwig <hch@xxxxxx> And drop bits that are outdated or replaced by top-level Documentation. Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- librdmacm/README => Documentation/librdmacm.md | 27 ++++++-------------------- 1 file changed, 6 insertions(+), 21 deletions(-) rename librdmacm/README => Documentation/librdmacm.md (65%) diff --git a/librdmacm/README b/Documentation/librdmacm.md similarity index 65% rename from librdmacm/README rename to Documentation/librdmacm.md index e1f222740144..817383661c06 100644 --- a/librdmacm/README +++ b/Documentation/librdmacm.md @@ -1,19 +1,5 @@ -This README is for userspace RDMA cm library. +# Device files - -Building -======== -To make this directory, run: -./autogen.sh && ./configure && make && make install - -Typically the autogen and configure steps only need be done the first -time unless configure.in or Makefile.am changes. - -Libraries are installed by default at /usr/local/lib. - - -Device files -============ The userspace CMA uses a single device file regardless of the number of adapters or ports present. @@ -31,17 +17,16 @@ or you can create it manually mknod /dev/infiniband/rdma_cm c 231 255 -Common issues -============= +# Common issues Using multiple interfaces - The librdmacm does support multiple interfaces. To make use +: The librdmacm does support multiple interfaces. To make use of multiple interfaces, however, you need to instruct linux to only send ARP reples on the interface targetted in the ARP request. This can be done using a command similar to the following: - sysctl -w net.ipv4.conf.all.arp_ignore=2 + sysctl -w net.ipv4.conf.all.arp_ignore=2 Without this change, it's possible for linux to resopnd to ARP requests on a different interface (IP address) than the IP @@ -50,12 +35,12 @@ Using multiple interfaces device. Using loopback - The librdmacm relies on ARP to resolve IP address to RDMA +: The librdmacm relies on ARP to resolve IP address to RDMA addresses. To support loopback connections between different ports on the same system, ARP must be enabled for local resolution: - sysctl net.ipv4.conf.all.accept_local=1 + sysctl net.ipv4.conf.all.accept_local=1 Without this setting, loopback connections may timeout during address resolution. -- 2.1.4 -- 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