diff options
| author | Jeff Layton <jlayton@redhat.com> | 2008-10-20 11:51:58 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2009-01-06 11:53:48 -0500 |
| commit | c72a476b4b7ecadb80185de31236edb303c1a5d0 (patch) | |
| tree | c57ac715970c4a3363b28122ce2d3b47fe179b7f /fs/lockd | |
| parent | c9233eb7b0b11ef176d4bf68da2ce85464b6ec39 (diff) | |
| download | lwn-c72a476b4b7ecadb80185de31236edb303c1a5d0.tar.gz lwn-c72a476b4b7ecadb80185de31236edb303c1a5d0.zip | |
lockd: set svc_serv->sv_maxconn to a more reasonable value (try #3)
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 1024 (which is the typical
default value for RLIMIT_NOFILE. Also add a module parameter to allow an
admin to set this to an arbitrary value.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Neil Brown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/lockd')
| -rw-r--r-- | fs/lockd/svc.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 252d80163d02..bc3c3cb62db5 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -62,6 +62,9 @@ static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO; static int nlm_udpport, nlm_tcpport; int nsm_use_hostnames = 0; +/* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */ +static unsigned int nlm_max_connections = 1024; + /* * Constants needed for the sysctl interface. */ @@ -143,6 +146,9 @@ lockd(void *vrqstp) long timeout = MAX_SCHEDULE_TIMEOUT; RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); + /* update sv_maxconn if it has changed */ + rqstp->rq_server->sv_maxconn = nlm_max_connections; + if (signalled()) { flush_signals(current); if (nlmsvc_ops) { @@ -276,6 +282,7 @@ int lockd_up(void) } svc_sock_update_bufs(serv); + serv->sv_maxconn = nlm_max_connections; nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name); if (IS_ERR(nlmsvc_task)) { @@ -485,6 +492,7 @@ 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. |