staging: lustre: obdclass: add LCT_SERVER_SESSION for server session

Add LCT_SERVER_SESSION for server session, and separate the
server session flag from LCT_SESSION, so to avoid allocating
session info for client stack for each server request, if
client and server are on the same node.

Signed-off-by: Wang Di <di.wang@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3806
Reviewed-on: http://review.whamcloud.com/7412
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@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>

diff --git a/drivers/staging/lustre/lustre/include/lu_object.h b/drivers/staging/lustre/lustre/include/lu_object.h
index b5b0c81..a27e76f 100644 (file)
--- a/drivers/staging/lustre/lustre/include/lu_object.h
+++ b/drivers/staging/lustre/lustre/include/lu_object.h
@@ -1006,6 +1006,10 @@ enum lu_context_tag {
         */
        LCT_LOCAL = 1 << 7,
        /**
+        * session for server thread
+        **/
+       LCT_SERVER_SESSION = BIT(8),
+       /**
         * Set when at least one of keys, having values in this context has
         * non-NULL lu_context_key::lct_exit() method. This is used to
         * optimize lu_context_exit() call.

diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
index 40f7a23..32863bc 100644 (file)
--- a/drivers/staging/lustre/lustre/include/obd_class.h
+++ b/drivers/staging/lustre/lustre/include/obd_class.h
@@ -477,7 +477,7 @@ static inline int obd_setup(struct obd_device *obd, struct lustre_cfg *cfg)
                struct lu_context  session_ctx;
                struct lu_env env;
 
-               lu_context_init(&session_ctx, LCT_SESSION);
+               lu_context_init(&session_ctx, LCT_SESSION | LCT_SERVER_SESSION);
                session_ctx.lc_thread = NULL;
                lu_context_enter(&session_ctx);
 

diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c b/drivers/staging/lustre/lustre/ptlrpc/service.c
index 1bbd1d3..fc2632f 100644 (file)
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/service.c
@@ -1649,7 +1649,8 @@ ptlrpc_server_handle_request(struct ptlrpc_service_part *svcpt,
                                    at_get(&svcpt->scp_at_estimate));
        }
 
-       rc = lu_context_init(&request->rq_session, LCT_SESSION | LCT_NOREF);
+       rc = lu_context_init(&request->rq_session, LCT_SERVER_SESSION |
+                                                  LCT_NOREF);
        if (rc) {
                CERROR("Failure to initialize session: %d\n", rc);
                goto out_req;