As you know, DLM module can use TCP or SCTP protocols to communicate among the cluster. But, according to our testing, SCTP protocol is still considered experimental, since not all aspects are working correctly and it is not full tested. e.g. SCTP connection channel switch needs about 5mins hang in case one connection(ring) is broken. Then, I suggest to add a kernel print, which prompts the user SCTP protocol for DLM should be considered experimental, it is not recommended in production environment.
Signed-off-by: Gang He <g...@suse.com> --- fs/dlm/lowcomms.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index cff79ea..18fd85d 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1307,6 +1307,7 @@ static int sctp_listen_for_all(void) return -ENOMEM; log_print("Using SCTP for communications"); + log_print("SCTP protocol is experimental, use at your own risk"); result = sock_create_kern(&init_net, dlm_local_addr[0]->ss_family, SOCK_STREAM, IPPROTO_SCTP, &sock); -- 1.8.5.6