RDS/IB: create a work queue for FMR flushing

This patch moves the FMR flushing work in to its own mult-threaded work queue.
This is to maintain performance in preparation for returning the main krdsd
work queue back to a single threaded work queue to avoid deep-rooted
concurrency bugs.

This is also good because it further separates FMRs, which might be removed
some day, from the rest of the code base.

Signed-off-by: Zach Brown <zach.brown@oracle.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/net/rds/ib.c b/net/rds/ib.c
index af1ef18b6ff0..d2007b931616 100644
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -351,6 +351,7 @@ void rds_ib_exit(void)
         rds_ib_sysctl_exit();
         rds_ib_recv_exit();
         rds_trans_unregister(&rds_ib_transport);
+        rds_ib_fmr_exit();
 }
 
 struct rds_transport rds_ib_transport = {
@@ -386,10 +387,14 @@ int __init rds_ib_init(void)
 
         INIT_LIST_HEAD(&rds_ib_devices);
 
-        ret = ib_register_client(&rds_ib_client);
+        ret = rds_ib_fmr_init();
         if (ret)
                 goto out;
 
+        ret = ib_register_client(&rds_ib_client);
+        if (ret)
+                goto out_fmr_exit;
+
         ret = rds_ib_sysctl_init();
         if (ret)
                 goto out_ibreg;
@@ -412,6 +417,8 @@ out_sysctl:
         rds_ib_sysctl_exit();
 out_ibreg:
         rds_ib_unregister_client();
+out_fmr_exit:
+        rds_ib_fmr_exit();
 out:
         return ret;
 }