The default method for calculating the number of connections allowed per RPC service arbitrarily limits single-threaded services to 80 connections. This is too low for services like lockd and artificially limits the number of TCP clients that it can support. Have lockd set a default sv_maxconn value to RLIMIT_NOFILE for the lockd thread (usually this will be 1024). Also add a module parameter to allow an admin to set this to an arbitrary value at module load time. Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> --- fs/lockd/svc.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index c631a83..81c336a 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -61,6 +61,7 @@ static unsigned long nlm_grace_period; static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; static int nlm_udpport, nlm_tcpport; int nsm_use_hostnames = 0; +unsigned int nlm_max_connections; /* * Constants needed for the sysctl interface. @@ -287,6 +288,9 @@ int lockd_up(void) goto destroy_and_out; } + serv->sv_maxconn = nlm_max_connections ? nlm_max_connections : + nlmsvc_task->signal->rlim[RLIMIT_NOFILE].rlim_cur; + /* * Note: svc_serv structures have an initial use count of 1, * so we exit through here on both success and failure. @@ -484,6 +488,7 @@ module_param_call(nlm_udpport, param_set_port, param_get_int, module_param_call(nlm_tcpport, param_set_port, param_get_int, &nlm_tcpport, 0644); module_param(nsm_use_hostnames, bool, 0644); +module_param(nlm_max_connections, uint, 0644); /* * Initialising and terminating the module. -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
