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staging: lustre: lnet: Enable setting per NI peer_credits

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The code to allow peer_credits to be set per NI was originally
"left inactive" because there were concerns about peer_credits
interfering with the ability for IB nodes to connect to each
other when peer_credits are not the same (peer_credits controls
the queue depth for IB). With LU-3322, the values do not have
to match so it is now safe to enable this code so peer_credits
can be set per NI.

This patch enables existing code for setting per NI peer_credits.

Second this patch fixes a long standing bug in that the conf data
was not being used to set variables in the lnet_ni structure until
after lnd_startup() was called which meant LND drivers were
ignoring struct lnet_ni tunable values being set. Now we change
struct lnet_ni data fields based on conf data before calling
lnd_startup().

Signed-off-by: Doug Oucharek <doug.s.oucharek@intel.com>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8507
Reviewed-on: http://review.whamcloud.com/21948
Reviewed-by: Olaf Weber <olaf@sgi.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Doug Oucharek 2016-09-18 16:39:01 -04:00 committed by Greg Kroah-Hartman
parent 9522bb7ac7
commit abe8a55fb0
1 changed files with 19 additions and 27 deletions
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46
drivers/staging/lustre/lnet/lnet/api-ni.c
View File

@ -1286,6 +1286,25 @@ lnet_startup_lndni(struct lnet_ni *ni, struct lnet_ioctl_config_data *conf)
sizeof(*ni->ni_lnd_tunables));
}
/*
* If given some LND tunable parameters, parse those now to
* override the values in the NI structure.
*/
if (conf) {
if (conf->cfg_config_u.cfg_net.net_peer_rtr_credits >= 0)
ni->ni_peerrtrcredits =
conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
if (conf->cfg_config_u.cfg_net.net_peer_timeout >= 0)
ni->ni_peertimeout =
conf->cfg_config_u.cfg_net.net_peer_timeout;
if (conf->cfg_config_u.cfg_net.net_peer_tx_credits != -1)
ni->ni_peertxcredits =
conf->cfg_config_u.cfg_net.net_peer_tx_credits;
if (conf->cfg_config_u.cfg_net.net_max_tx_credits >= 0)
ni->ni_maxtxcredits =
conf->cfg_config_u.cfg_net.net_max_tx_credits;
}
rc = lnd->lnd_startup(ni);
mutex_unlock(&the_lnet.ln_lnd_mutex);
@ -1299,33 +1318,6 @@ lnet_startup_lndni(struct lnet_ni *ni, struct lnet_ioctl_config_data *conf)
goto failed0;
}
/*
* If given some LND tunable parameters, parse those now to
* override the values in the NI structure.
*/
if (conf && conf->cfg_config_u.cfg_net.net_peer_rtr_credits >= 0) {
ni->ni_peerrtrcredits =
conf->cfg_config_u.cfg_net.net_peer_rtr_credits;
}
if (conf && conf->cfg_config_u.cfg_net.net_peer_timeout >= 0) {
ni->ni_peertimeout =
conf->cfg_config_u.cfg_net.net_peer_timeout;
}
/*
* TODO
* Note: For now, don't allow the user to change
* peertxcredits as this number is used in the
* IB LND to control queue depth.
*
* if (conf && conf->cfg_config_u.cfg_net.net_peer_tx_credits != -1)
* ni->ni_peertxcredits =
* conf->cfg_config_u.cfg_net.net_peer_tx_credits;
*/
if (conf && conf->cfg_config_u.cfg_net.net_max_tx_credits >= 0) {
ni->ni_maxtxcredits =
conf->cfg_config_u.cfg_net.net_max_tx_credits;
}
LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query);
lnet_net_lock(LNET_LOCK_EX);