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LU-6271 osc: handle osc eviction correctly
[fs/lustre-release.git] / lustre / osc / osc_request.c
index 58647e7..42d132d 100644 (file)
 #include <lustre_param.h>
 #include <lustre_fid.h>
 #include <obd_class.h>
+#include <obd.h>
+#include <lustre_net.h>
 #include "osc_internal.h"
 #include "osc_cl_internal.h"
 
+atomic_t osc_pool_req_count;
+unsigned int osc_reqpool_maxreqcount;
+struct ptlrpc_request_pool *osc_rq_pool;
+
+/* max memory used for request pool, unit is MB */
+static unsigned int osc_reqpool_mem_max = 5;
+module_param(osc_reqpool_mem_max, uint, 0444);
+
 struct osc_brw_async_args {
        struct obdo              *aa_oa;
        int                       aa_requested_nob;
@@ -62,7 +72,6 @@ struct osc_brw_async_args {
        struct client_obd        *aa_cli;
        struct list_head          aa_oaps;
        struct list_head          aa_exts;
-       struct obd_capa  *aa_ocapa;
        struct cl_req            *aa_clerq;
 };
 
@@ -75,15 +84,16 @@ struct osc_setattr_args {
 };
 
 struct osc_fsync_args {
-       struct obd_info *fa_oi;
-       obd_enqueue_update_f     fa_upcall;
+       struct osc_object       *fa_obj;
+       struct obdo             *fa_oa;
+       obd_enqueue_update_f    fa_upcall;
        void                    *fa_cookie;
 };
 
 struct osc_enqueue_args {
        struct obd_export       *oa_exp;
-       ldlm_type_t             oa_type;
-       ldlm_mode_t             oa_mode;
+       enum ldlm_type          oa_type;
+       enum ldlm_mode          oa_mode;
        __u64                   *oa_flags;
        osc_enqueue_upcall_f    oa_upcall;
        void                    *oa_cookie;
@@ -96,158 +106,98 @@ static void osc_release_ppga(struct brw_page **ppga, size_t count);
 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
                         void *data, int rc);
 
-static inline void osc_pack_capa(struct ptlrpc_request *req,
-                                 struct ost_body *body, void *capa)
-{
-        struct obd_capa *oc = (struct obd_capa *)capa;
-        struct lustre_capa *c;
-
-        if (!capa)
-                return;
-
-        c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
-        LASSERT(c);
-        capa_cpy(c, oc);
-        body->oa.o_valid |= OBD_MD_FLOSSCAPA;
-        DEBUG_CAPA(D_SEC, c, "pack");
-}
-
-void osc_pack_req_body(struct ptlrpc_request *req, struct obd_info *oinfo)
+void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
 {
        struct ost_body *body;
 
        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
        LASSERT(body);
 
-       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
-                            oinfo->oi_oa);
-       osc_pack_capa(req, body, oinfo->oi_capa);
-}
-
-void osc_set_capa_size(struct ptlrpc_request *req,
-                      const struct req_msg_field *field,
-                      struct obd_capa *oc)
-{
-        if (oc == NULL)
-                req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
-        else
-                /* it is already calculated as sizeof struct obd_capa */
-                ;
-}
-
-int osc_getattr_interpret(const struct lu_env *env,
-                         struct ptlrpc_request *req,
-                         struct osc_async_args *aa, int rc)
-{
-        struct ost_body *body;
-        ENTRY;
-
-        if (rc != 0)
-                GOTO(out, rc);
-
-        body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body) {
-               CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
-               lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
-                                    aa->aa_oi->oi_oa, &body->oa);
-
-               /* This should really be sent by the OST */
-               aa->aa_oi->oi_oa->o_blksize = DT_MAX_BRW_SIZE;
-               aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
-        } else {
-                CDEBUG(D_INFO, "can't unpack ost_body\n");
-                rc = -EPROTO;
-                aa->aa_oi->oi_oa->o_valid = 0;
-        }
-out:
-        rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
-        RETURN(rc);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 }
 
 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
-                       struct obd_info *oinfo)
+                      struct obdo *oa)
 {
-        struct ptlrpc_request *req;
-        struct ost_body       *body;
-        int                    rc;
-        ENTRY;
+       struct ptlrpc_request   *req;
+       struct ost_body         *body;
+       int                      rc;
 
-        req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
-        if (req == NULL)
-                RETURN(-ENOMEM);
+       ENTRY;
+       req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
+       if (req == NULL)
+               RETURN(-ENOMEM);
 
-        osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
-        rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
-        if (rc) {
-                ptlrpc_request_free(req);
-                RETURN(rc);
-        }
+       rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
+       if (rc) {
+               ptlrpc_request_free(req);
+               RETURN(rc);
+       }
 
-        osc_pack_req_body(req, oinfo);
+       osc_pack_req_body(req, oa);
 
-        ptlrpc_request_set_replen(req);
+       ptlrpc_request_set_replen(req);
 
-        rc = ptlrpc_queue_wait(req);
-        if (rc)
-                GOTO(out, rc);
+       rc = ptlrpc_queue_wait(req);
+       if (rc)
+               GOTO(out, rc);
 
-        body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL)
-                GOTO(out, rc = -EPROTO);
+       body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+       if (body == NULL)
+               GOTO(out, rc = -EPROTO);
 
        CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
-       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
-                            &body->oa);
+       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
 
-       oinfo->oi_oa->o_blksize = cli_brw_size(exp->exp_obd);
-       oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
+       oa->o_blksize = cli_brw_size(exp->exp_obd);
+       oa->o_valid |= OBD_MD_FLBLKSZ;
 
-        EXIT;
- out:
-        ptlrpc_req_finished(req);
-        return rc;
+       EXIT;
+out:
+       ptlrpc_req_finished(req);
+
+       return rc;
 }
 
 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
-                      struct obd_info *oinfo)
+                      struct obdo *oa)
 {
-        struct ptlrpc_request *req;
-        struct ost_body       *body;
-        int                    rc;
-        ENTRY;
+       struct ptlrpc_request   *req;
+       struct ost_body         *body;
+       int                      rc;
 
-        LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
+       ENTRY;
+       LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 
-        req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
-        if (req == NULL)
-                RETURN(-ENOMEM);
+       req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
+       if (req == NULL)
+               RETURN(-ENOMEM);
 
-        osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
-        rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
-        if (rc) {
-                ptlrpc_request_free(req);
-                RETURN(rc);
-        }
+       rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
+       if (rc) {
+               ptlrpc_request_free(req);
+               RETURN(rc);
+       }
 
-        osc_pack_req_body(req, oinfo);
+       osc_pack_req_body(req, oa);
 
-        ptlrpc_request_set_replen(req);
+       ptlrpc_request_set_replen(req);
 
-        rc = ptlrpc_queue_wait(req);
-        if (rc)
-                GOTO(out, rc);
+       rc = ptlrpc_queue_wait(req);
+       if (rc)
+               GOTO(out, rc);
 
-        body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL)
-                GOTO(out, rc = -EPROTO);
+       body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+       if (body == NULL)
+               GOTO(out, rc = -EPROTO);
 
-       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
-                            &body->oa);
+       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
 
-        EXIT;
+       EXIT;
 out:
-        ptlrpc_req_finished(req);
-        RETURN(rc);
+       ptlrpc_req_finished(req);
+
+       RETURN(rc);
 }
 
 static int osc_setattr_interpret(const struct lu_env *env,
@@ -271,51 +221,51 @@ out:
         RETURN(rc);
 }
 
-int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
+int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
                      obd_enqueue_update_f upcall, void *cookie,
                      struct ptlrpc_request_set *rqset)
 {
-        struct ptlrpc_request   *req;
-        struct osc_setattr_args *sa;
-        int                      rc;
-        ENTRY;
+       struct ptlrpc_request   *req;
+       struct osc_setattr_args *sa;
+       int                      rc;
 
-        req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
-        if (req == NULL)
-                RETURN(-ENOMEM);
+       ENTRY;
 
-        osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
-        rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
-        if (rc) {
-                ptlrpc_request_free(req);
-                RETURN(rc);
-        }
+       req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
+       if (req == NULL)
+               RETURN(-ENOMEM);
 
-        osc_pack_req_body(req, oinfo);
+       rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
+       if (rc) {
+               ptlrpc_request_free(req);
+               RETURN(rc);
+       }
 
-        ptlrpc_request_set_replen(req);
+       osc_pack_req_body(req, oa);
 
-        /* do mds to ost setattr asynchronously */
-        if (!rqset) {
-                /* Do not wait for response. */
-                ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
-        } else {
-                req->rq_interpret_reply =
-                        (ptlrpc_interpterer_t)osc_setattr_interpret;
-
-                CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
-                sa = ptlrpc_req_async_args(req);
-                sa->sa_oa = oinfo->oi_oa;
-                sa->sa_upcall = upcall;
-                sa->sa_cookie = cookie;
-
-                if (rqset == PTLRPCD_SET)
-                        ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
-                else
-                        ptlrpc_set_add_req(rqset, req);
-        }
+       ptlrpc_request_set_replen(req);
 
-        RETURN(0);
+       /* do mds to ost setattr asynchronously */
+       if (!rqset) {
+               /* Do not wait for response. */
+               ptlrpcd_add_req(req);
+       } else {
+               req->rq_interpret_reply =
+                       (ptlrpc_interpterer_t)osc_setattr_interpret;
+
+               CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
+               sa = ptlrpc_req_async_args(req);
+               sa->sa_oa = oa;
+               sa->sa_upcall = upcall;
+               sa->sa_cookie = cookie;
+
+               if (rqset == PTLRPCD_SET)
+                       ptlrpcd_add_req(req);
+               else
+                       ptlrpc_set_add_req(rqset, req);
+       }
+
+       RETURN(0);
 }
 
 static int osc_create(const struct lu_env *env, struct obd_export *exp,
@@ -369,7 +319,7 @@ out:
        RETURN(rc);
 }
 
-int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
+int osc_punch_base(struct obd_export *exp, struct obdo *oa,
                    obd_enqueue_update_f upcall, void *cookie,
                    struct ptlrpc_request_set *rqset)
 {
@@ -383,7 +333,6 @@ int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
         if (req == NULL)
                 RETURN(-ENOMEM);
 
-        osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
         if (rc) {
                 ptlrpc_request_free(req);
@@ -394,53 +343,68 @@ int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
 
        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
        LASSERT(body);
-       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
-                            oinfo->oi_oa);
-       osc_pack_capa(req, body, oinfo->oi_capa);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 
-        ptlrpc_request_set_replen(req);
+       ptlrpc_request_set_replen(req);
 
-        req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
-        CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
-        sa = ptlrpc_req_async_args(req);
-        sa->sa_oa     = oinfo->oi_oa;
-        sa->sa_upcall = upcall;
-        sa->sa_cookie = cookie;
-        if (rqset == PTLRPCD_SET)
-                ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
-        else
-                ptlrpc_set_add_req(rqset, req);
+       req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
+       CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
+       sa = ptlrpc_req_async_args(req);
+       sa->sa_oa = oa;
+       sa->sa_upcall = upcall;
+       sa->sa_cookie = cookie;
+       if (rqset == PTLRPCD_SET)
+               ptlrpcd_add_req(req);
+       else
+               ptlrpc_set_add_req(rqset, req);
 
-        RETURN(0);
+       RETURN(0);
 }
 
 static int osc_sync_interpret(const struct lu_env *env,
                               struct ptlrpc_request *req,
                               void *arg, int rc)
 {
-       struct osc_fsync_args *fa = arg;
-        struct ost_body *body;
-        ENTRY;
+       struct osc_fsync_args   *fa = arg;
+       struct ost_body         *body;
+       struct cl_attr          *attr = &osc_env_info(env)->oti_attr;
+       unsigned long           valid = 0;
+       struct cl_object        *obj;
+       ENTRY;
 
-        if (rc)
-                GOTO(out, rc);
+       if (rc != 0)
+               GOTO(out, rc);
 
-        body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL) {
-                CERROR ("can't unpack ost_body\n");
-                GOTO(out, rc = -EPROTO);
-        }
+       body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+       if (body == NULL) {
+               CERROR("can't unpack ost_body\n");
+               GOTO(out, rc = -EPROTO);
+       }
+
+       *fa->fa_oa = body->oa;
+       obj = osc2cl(fa->fa_obj);
+
+       /* Update osc object's blocks attribute */
+       cl_object_attr_lock(obj);
+       if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
+               attr->cat_blocks = body->oa.o_blocks;
+               valid |= CAT_BLOCKS;
+       }
+
+       if (valid != 0)
+               cl_object_attr_update(env, obj, attr, valid);
+       cl_object_attr_unlock(obj);
 
-       *fa->fa_oi->oi_oa = body->oa;
 out:
        rc = fa->fa_upcall(fa->fa_cookie, rc);
        RETURN(rc);
 }
 
-int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
+int osc_sync_base(struct osc_object *obj, struct obdo *oa,
                  obd_enqueue_update_f upcall, void *cookie,
                   struct ptlrpc_request_set *rqset)
 {
+       struct obd_export     *exp = osc_export(obj);
        struct ptlrpc_request *req;
        struct ost_body       *body;
        struct osc_fsync_args *fa;
@@ -451,7 +415,6 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
         if (req == NULL)
                 RETURN(-ENOMEM);
 
-        osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
         if (rc) {
                 ptlrpc_request_free(req);
@@ -461,21 +424,20 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
        /* overload the size and blocks fields in the oa with start/end */
        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
        LASSERT(body);
-       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
-                            oinfo->oi_oa);
-       osc_pack_capa(req, body, oinfo->oi_capa);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 
-        ptlrpc_request_set_replen(req);
-        req->rq_interpret_reply = osc_sync_interpret;
+       ptlrpc_request_set_replen(req);
+       req->rq_interpret_reply = osc_sync_interpret;
 
        CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
        fa = ptlrpc_req_async_args(req);
-       fa->fa_oi = oinfo;
+       fa->fa_obj = obj;
+       fa->fa_oa = oa;
        fa->fa_upcall = upcall;
        fa->fa_cookie = cookie;
 
        if (rqset == PTLRPCD_SET)
-               ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+               ptlrpcd_add_req(req);
        else
                ptlrpc_set_add_req(rqset, req);
 
@@ -487,13 +449,13 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
  * locks added to @cancels list. */
 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
                                   struct list_head *cancels,
-                                  ldlm_mode_t mode, __u64 lock_flags)
+                                  enum ldlm_mode mode, __u64 lock_flags)
 {
-        struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
-        struct ldlm_res_id res_id;
-        struct ldlm_resource *res;
-        int count;
-        ENTRY;
+       struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
+       struct ldlm_res_id res_id;
+       struct ldlm_resource *res;
+       int count;
+       ENTRY;
 
        /* Return, i.e. cancel nothing, only if ELC is supported (flag in
         * export) but disabled through procfs (flag in NS).
@@ -570,7 +532,6 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
                 RETURN(-ENOMEM);
         }
 
-       osc_set_capa_size(req, &RMF_CAPA1, NULL);
         rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
                                0, &cancels, count);
         if (rc) {
@@ -599,9 +560,9 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
                                       osc_can_send_destroy(cli), &lwi);
        }
 
-        /* Do not wait for response */
-        ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
-        RETURN(0);
+       /* Do not wait for response */
+       ptlrpcd_add_req(req);
+       RETURN(0);
 }
 
 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
@@ -622,13 +583,12 @@ static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
                oa->o_undirty = 0;
        } else if (unlikely(atomic_long_read(&obd_dirty_pages) -
                            atomic_long_read(&obd_dirty_transit_pages) >
-                           (obd_max_dirty_pages + 1))) {
+                           (long)(obd_max_dirty_pages + 1))) {
                /* The atomic_read() allowing the atomic_inc() are
                 * not covered by a lock thus they may safely race and trip
                 * this CERROR() unless we add in a small fudge factor (+1). */
-               CERROR("%s: dirty %ld - %ld > system dirty_max %lu\n",
-                      cli->cl_import->imp_obd->obd_name,
-                      atomic_long_read(&obd_dirty_pages),
+               CERROR("%s: dirty %ld - %ld > system dirty_max %ld\n",
+                      cli_name(cli), atomic_long_read(&obd_dirty_pages),
                       atomic_long_read(&obd_dirty_transit_pages),
                       obd_max_dirty_pages);
                oa->o_undirty = 0;
@@ -815,21 +775,19 @@ static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
 
 static int osc_add_shrink_grant(struct client_obd *client)
 {
-        int rc;
+       int rc;
 
-        rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
-                                       TIMEOUT_GRANT,
-                                       osc_grant_shrink_grant_cb, NULL,
-                                       &client->cl_grant_shrink_list);
-        if (rc) {
-                CERROR("add grant client %s error %d\n",
-                        client->cl_import->imp_obd->obd_name, rc);
-                return rc;
-        }
-        CDEBUG(D_CACHE, "add grant client %s \n",
-               client->cl_import->imp_obd->obd_name);
-        osc_update_next_shrink(client);
-        return 0;
+       rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
+                                      TIMEOUT_GRANT,
+                                      osc_grant_shrink_grant_cb, NULL,
+                                      &client->cl_grant_shrink_list);
+       if (rc) {
+               CERROR("add grant client %s error %d\n", cli_name(client), rc);
+               return rc;
+       }
+       CDEBUG(D_CACHE, "add grant client %s\n", cli_name(client));
+       osc_update_next_shrink(client);
+       return 0;
 }
 
 static int osc_del_shrink_grant(struct client_obd *client)
@@ -858,7 +816,7 @@ static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
 
         if (cli->cl_avail_grant < 0) {
                CWARN("%s: available grant < 0: avail/ocd/dirty %ld/%u/%ld\n",
-                     cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant,
+                     cli_name(cli), cli->cl_avail_grant,
                      ocd->ocd_grant, cli->cl_dirty_pages << PAGE_CACHE_SHIFT);
                /* workaround for servers which do not have the patch from
                 * LU-2679 */
@@ -870,8 +828,8 @@ static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
        spin_unlock(&cli->cl_loi_list_lock);
 
        CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
-               "chunk bits: %d.\n", cli->cl_import->imp_obd->obd_name,
-               cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits);
+              "chunk bits: %d.\n", cli_name(cli), cli->cl_avail_grant,
+              cli->cl_lost_grant, cli->cl_chunkbits);
 
        if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
            list_empty(&cli->cl_grant_shrink_list))
@@ -1031,8 +989,7 @@ static u32 osc_checksum_bulk(int nob, size_t pg_count,
 static int
 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
                     u32 page_count, struct brw_page **pga,
-                    struct ptlrpc_request **reqp, struct obd_capa *ocapa,
-                    int reserve, int resend)
+                    struct ptlrpc_request **reqp, int resend)
 {
         struct ptlrpc_request   *req;
         struct ptlrpc_bulk_desc *desc;
@@ -1050,15 +1007,15 @@ osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
                 RETURN(-EINVAL); /* Fatal */
 
-        if ((cmd & OBD_BRW_WRITE) != 0) {
-                opc = OST_WRITE;
-                req = ptlrpc_request_alloc_pool(cli->cl_import,
-                                                cli->cl_import->imp_rq_pool,
-                                                &RQF_OST_BRW_WRITE);
-        } else {
-                opc = OST_READ;
-                req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
-        }
+       if ((cmd & OBD_BRW_WRITE) != 0) {
+               opc = OST_WRITE;
+               req = ptlrpc_request_alloc_pool(cli->cl_import,
+                                               osc_rq_pool,
+                                               &RQF_OST_BRW_WRITE);
+       } else {
+               opc = OST_READ;
+               req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
+       }
         if (req == NULL)
                 RETURN(-ENOMEM);
 
@@ -1072,7 +1029,6 @@ osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
                              sizeof(*ioobj));
         req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
                              niocount * sizeof(*niobuf));
-        osc_set_capa_size(req, &RMF_CAPA1, ocapa);
 
         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
         if (rc) {
@@ -1087,8 +1043,11 @@ osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
 
        desc = ptlrpc_prep_bulk_imp(req, page_count,
                cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
-               opc == OST_WRITE ? BULK_GET_SOURCE : BULK_PUT_SINK,
-               OST_BULK_PORTAL);
+               (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
+                       PTLRPC_BULK_PUT_SINK) |
+                       PTLRPC_BULK_BUF_KIOV,
+               OST_BULK_PORTAL,
+               &ptlrpc_bulk_kiov_pin_ops);
 
         if (desc == NULL)
                 GOTO(out, rc = -ENOMEM);
@@ -1109,7 +1068,6 @@ osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
         * "max - 1" for old client compatibility sending "0", and also so the
         * the actual maximum is a power-of-two number, not one less. LU-1431 */
        ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
-       osc_pack_capa(req, body, ocapa);
        LASSERT(page_count > 0);
        pg_prev = pga[0];
         for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
@@ -1135,7 +1093,7 @@ osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
                 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
                         (pg->flag & OBD_BRW_SRVLOCK));
 
-               ptlrpc_prep_bulk_page_pin(desc, pg->pg, poff, pg->count);
+               desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff, pg->count);
                 requested_nob += pg->count;
 
                 if (i > 0 && can_merge_pages(pg_prev, pg)) {
@@ -1219,8 +1177,6 @@ osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
         aa->aa_ppga = pga;
         aa->aa_cli = cli;
        INIT_LIST_HEAD(&aa->aa_oaps);
-        if (ocapa && reserve)
-                aa->aa_ocapa = capa_get(ocapa);
 
        *reqp = req;
        niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
@@ -1440,11 +1396,10 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
        DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
                  "redo for recoverable error %d", rc);
 
-        rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
-                                        OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
-                                  aa->aa_cli, aa->aa_oa,
-                                  aa->aa_page_count, aa->aa_ppga,
-                                  &new_req, aa->aa_ocapa, 0, 1);
+       rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
+                               OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
+                                 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
+                                 aa->aa_ppga, &new_req, 1);
         if (rc)
                 RETURN(rc);
 
@@ -1489,14 +1444,11 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
                 }
         }
 
-        new_aa->aa_ocapa = aa->aa_ocapa;
-        aa->aa_ocapa = NULL;
-
        /* XXX: This code will run into problem if we're going to support
         * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
         * and wait for all of them to be finished. We should inherit request
         * set from old request. */
-       ptlrpcd_add_req(new_req, PDL_POLICY_SAME, -1);
+       ptlrpcd_add_req(new_req);
 
        DEBUG_REQ(D_INFO, new_req, "new request");
        RETURN(0);
@@ -1575,11 +1527,6 @@ static int brw_interpret(const struct lu_env *env,
                        rc = -EIO;
        }
 
-        if (aa->aa_ocapa) {
-                capa_put(aa->aa_ocapa);
-                aa->aa_ocapa = NULL;
-        }
-
        if (rc == 0) {
                struct obdo *oa = aa->aa_oa;
                struct cl_attr *attr = &osc_env_info(env)->oti_attr;
@@ -1659,7 +1606,7 @@ static int brw_interpret(const struct lu_env *env,
        osc_wake_cache_waiters(cli);
        spin_unlock(&cli->cl_loi_list_lock);
 
-       osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
+       osc_io_unplug(env, cli, NULL);
        RETURN(rc);
 }
 
@@ -1687,7 +1634,7 @@ static void brw_commit(struct ptlrpc_request *req)
  * Extents in the list must be in OES_RPC state.
  */
 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
-                 struct list_head *ext_list, int cmd, pdl_policy_t pol)
+                 struct list_head *ext_list, int cmd)
 {
        struct ptlrpc_request           *req = NULL;
        struct osc_extent               *ext;
@@ -1784,8 +1731,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
        }
 
        sort_brw_pages(pga, page_count);
-       rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req,
-                                 crattr->cra_capa, 1, 0);
+       rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
        if (rc != 0) {
                CERROR("prep_req failed: %d\n", rc);
                GOTO(out, rc);
@@ -1854,19 +1800,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
                  page_count, aa, cli->cl_r_in_flight,
                  cli->cl_w_in_flight);
 
-       /* XXX: Maybe the caller can check the RPC bulk descriptor to
-        * see which CPU/NUMA node the majority of pages were allocated
-        * on, and try to assign the async RPC to the CPU core
-        * (PDL_POLICY_PREFERRED) to reduce cross-CPU memory traffic.
-        *
-        * But on the other hand, we expect that multiple ptlrpcd
-        * threads and the initial write sponsor can run in parallel,
-        * especially when data checksum is enabled, which is CPU-bound
-        * operation and single ptlrpcd thread cannot process in time.
-        * So more ptlrpcd threads sharing BRW load
-        * (with PDL_POLICY_ROUND) seems better.
-        */
-       ptlrpcd_add_req(req, pol, -1);
+       ptlrpcd_add_req(req);
        rc = 0;
        EXIT;
 
@@ -1874,10 +1808,8 @@ out:
        if (mem_tight != 0)
                cfs_memory_pressure_restore(mpflag);
 
-       if (crattr != NULL) {
-               capa_put(crattr->cra_capa);
+       if (crattr != NULL)
                OBD_FREE(crattr, sizeof(*crattr));
-       }
 
        if (rc != 0) {
                LASSERT(req == NULL);
@@ -1941,7 +1873,7 @@ static int osc_set_data_with_check(struct lustre_handle *lockh,
 
 static int osc_enqueue_fini(struct ptlrpc_request *req,
                            osc_enqueue_upcall_f upcall, void *cookie,
-                           struct lustre_handle *lockh, ldlm_mode_t mode,
+                           struct lustre_handle *lockh, enum ldlm_mode mode,
                            __u64 *flags, int agl, int errcode)
 {
        bool intent = *flags & LDLM_FL_HAS_INTENT;
@@ -1978,12 +1910,12 @@ static int osc_enqueue_fini(struct ptlrpc_request *req,
 }
 
 static int osc_enqueue_interpret(const struct lu_env *env,
-                                 struct ptlrpc_request *req,
-                                 struct osc_enqueue_args *aa, int rc)
+                                struct ptlrpc_request *req,
+                                struct osc_enqueue_args *aa, int rc)
 {
        struct ldlm_lock *lock;
        struct lustre_handle *lockh = &aa->oa_lockh;
-       ldlm_mode_t mode = aa->oa_mode;
+       enum ldlm_mode mode = aa->oa_mode;
        struct ost_lvb *lvb = aa->oa_lvb;
        __u32 lvb_len = sizeof(*lvb);
        __u64 flags = 0;
@@ -2040,7 +1972,7 @@ struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
  * is evicted from the cluster -- such scenarious make the life difficult, so
  * release locks just after they are obtained. */
 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
-                    __u64 *flags, ldlm_policy_data_t *policy,
+                    __u64 *flags, union ldlm_policy_data *policy,
                     struct ost_lvb *lvb, int kms_valid,
                     osc_enqueue_upcall_f upcall, void *cookie,
                     struct ldlm_enqueue_info *einfo,
@@ -2051,7 +1983,7 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
        struct ptlrpc_request *req = NULL;
        int intent = *flags & LDLM_FL_HAS_INTENT;
        __u64 match_lvb = agl ? 0 : LDLM_FL_LVB_READY;
-       ldlm_mode_t mode;
+       enum ldlm_mode mode;
        int rc;
        ENTRY;
 
@@ -2125,8 +2057,8 @@ no_match:
                if (req == NULL)
                        RETURN(-ENOMEM);
 
-               rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_ENQUEUE);
-               if (rc < 0) {
+               rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
+               if (rc) {
                         ptlrpc_request_free(req);
                         RETURN(rc);
                 }
@@ -2164,17 +2096,17 @@ no_match:
                                aa->oa_flags  = NULL;
                        }
 
-                        req->rq_interpret_reply =
-                                (ptlrpc_interpterer_t)osc_enqueue_interpret;
-                        if (rqset == PTLRPCD_SET)
-                                ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
-                        else
-                                ptlrpc_set_add_req(rqset, req);
-                } else if (intent) {
-                        ptlrpc_req_finished(req);
-                }
-                RETURN(rc);
-        }
+                       req->rq_interpret_reply =
+                               (ptlrpc_interpterer_t)osc_enqueue_interpret;
+                       if (rqset == PTLRPCD_SET)
+                               ptlrpcd_add_req(req);
+                       else
+                               ptlrpc_set_add_req(rqset, req);
+               } else if (intent) {
+                       ptlrpc_req_finished(req);
+               }
+               RETURN(rc);
+       }
 
        rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
                              flags, agl, rc);
@@ -2185,20 +2117,20 @@ no_match:
 }
 
 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
-                  __u32 type, ldlm_policy_data_t *policy, __u32 mode,
-                  __u64 *flags, void *data, struct lustre_handle *lockh,
-                  int unref)
+                  enum ldlm_type type, union ldlm_policy_data *policy,
+                  enum ldlm_mode mode, __u64 *flags, void *data,
+                  struct lustre_handle *lockh, int unref)
 {
        struct obd_device *obd = exp->exp_obd;
        __u64 lflags = *flags;
-       ldlm_mode_t rc;
+       enum ldlm_mode rc;
        ENTRY;
 
-        if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
-                RETURN(-EIO);
+       if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
+               RETURN(-EIO);
 
-        /* Filesystem lock extents are extended to page boundaries so that
-         * dealing with the page cache is a little smoother */
+       /* Filesystem lock extents are extended to page boundaries so that
+        * dealing with the page cache is a little smoother */
        policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
        policy->l_extent.end |= ~PAGE_MASK;
 
@@ -2514,15 +2446,16 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
                 req->rq_interpret_reply = osc_shrink_grant_interpret;
         }
 
-        ptlrpc_request_set_replen(req);
-        if (!KEY_IS(KEY_GRANT_SHRINK)) {
-                LASSERT(set != NULL);
-                ptlrpc_set_add_req(set, req);
-                ptlrpc_check_set(NULL, set);
-        } else
-                ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+       ptlrpc_request_set_replen(req);
+       if (!KEY_IS(KEY_GRANT_SHRINK)) {
+               LASSERT(set != NULL);
+               ptlrpc_set_add_req(set, req);
+               ptlrpc_check_set(NULL, set);
+       } else {
+               ptlrpcd_add_req(req);
+       }
 
-        RETURN(0);
+       RETURN(0);
 }
 
 static int osc_reconnect(const struct lu_env *env,
@@ -2580,6 +2513,33 @@ static int osc_disconnect(struct obd_export *exp)
         return rc;
 }
 
+static int osc_ldlm_resource_invalidate(struct cfs_hash *hs,
+       struct cfs_hash_bd *bd, struct hlist_node *hnode, void *arg)
+{
+       struct lu_env *env = arg;
+       struct ldlm_resource *res = cfs_hash_object(hs, hnode);
+       struct ldlm_lock *lock;
+       struct osc_object *osc = NULL;
+       ENTRY;
+
+       lock_res(res);
+       list_for_each_entry(lock, &res->lr_granted, l_res_link) {
+               if (lock->l_ast_data != NULL && osc == NULL) {
+                       osc = lock->l_ast_data;
+                       cl_object_get(osc2cl(osc));
+               }
+               lock->l_ast_data = NULL;
+       }
+       unlock_res(res);
+
+       if (osc != NULL) {
+               osc_object_invalidate(env, osc);
+               cl_object_put(env, osc2cl(osc));
+       }
+
+       RETURN(0);
+}
+
 static int osc_import_event(struct obd_device *obd,
                             struct obd_import *imp,
                             enum obd_import_event event)
@@ -2608,16 +2568,18 @@ static int osc_import_event(struct obd_device *obd,
                 struct lu_env         *env;
                 int                    refcheck;
 
+               ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
+
                 env = cl_env_get(&refcheck);
                 if (!IS_ERR(env)) {
-                        /* Reset grants */
-                        cli = &obd->u.cli;
-                        /* all pages go to failing rpcs due to the invalid
-                         * import */
-                       osc_io_unplug(env, cli, NULL, PDL_POLICY_ROUND);
-
-                        ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
-                        cl_env_put(env, &refcheck);
+                       osc_io_unplug(env, &obd->u.cli, NULL);
+
+                       cfs_hash_for_each_nolock(ns->ns_rs_hash,
+                                                osc_ldlm_resource_invalidate,
+                                                env, 0);
+                       cl_env_put(env, &refcheck);
+
+                       ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
                 } else
                         rc = PTR_ERR(env);
                 break;
@@ -2680,7 +2642,7 @@ static int brw_queue_work(const struct lu_env *env, void *data)
 
        CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
 
-       osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
+       osc_io_unplug(env, cli, NULL);
        RETURN(0);
 }
 
@@ -2690,6 +2652,9 @@ int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
        struct obd_type   *type;
        void              *handler;
        int                rc;
+       int                adding;
+       int                added;
+       int                req_count;
        ENTRY;
 
        rc = ptlrpcd_addref();
@@ -2746,15 +2711,20 @@ int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
                ptlrpc_lprocfs_register_obd(obd);
        }
 
-       /* We need to allocate a few requests more, because
-        * brw_interpret tries to create new requests before freeing
-        * previous ones, Ideally we want to have 2x max_rpcs_in_flight
-        * reserved, but I'm afraid that might be too much wasted RAM
-        * in fact, so 2 is just my guess and still should work. */
-       cli->cl_import->imp_rq_pool =
-               ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
-                                   OST_MAXREQSIZE,
-                                   ptlrpc_add_rqs_to_pool);
+       /*
+        * We try to control the total number of requests with a upper limit
+        * osc_reqpool_maxreqcount. There might be some race which will cause
+        * over-limit allocation, but it is fine.
+        */
+       req_count = atomic_read(&osc_pool_req_count);
+       if (req_count < osc_reqpool_maxreqcount) {
+               adding = cli->cl_max_rpcs_in_flight + 2;
+               if (req_count + adding > osc_reqpool_maxreqcount)
+                       adding = osc_reqpool_maxreqcount - req_count;
+
+               added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
+               atomic_add(added, &osc_pool_req_count);
+       }
 
        INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
        ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
@@ -2841,12 +2811,12 @@ int osc_cleanup(struct obd_device *obd)
        }
 
         /* free memory of osc quota cache */
-        osc_quota_cleanup(obd);
+       osc_quota_cleanup(obd);
 
-        rc = client_obd_cleanup(obd);
+       rc = client_obd_cleanup(obd);
 
-        ptlrpcd_decref();
-        RETURN(rc);
+       ptlrpcd_decref();
+       RETURN(rc);
 }
 
 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
@@ -2887,7 +2857,10 @@ static int __init osc_init(void)
 {
        bool enable_proc = true;
        struct obd_type *type;
+       unsigned int reqpool_size;
+       unsigned int reqsize;
        int rc;
+
        ENTRY;
 
         /* print an address of _any_ initialized kernel symbol from this
@@ -2905,11 +2878,39 @@ static int __init osc_init(void)
 
        rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
                                 LUSTRE_OSC_NAME, &osc_device_type);
-        if (rc) {
-                lu_kmem_fini(osc_caches);
-                RETURN(rc);
-        }
+       if (rc)
+               GOTO(out_kmem, rc);
+
+       /* This is obviously too much memory, only prevent overflow here */
+       if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
+               GOTO(out_type, rc = -EINVAL);
+
+       reqpool_size = osc_reqpool_mem_max << 20;
+
+       reqsize = 1;
+       while (reqsize < OST_IO_MAXREQSIZE)
+               reqsize = reqsize << 1;
+
+       /*
+        * We don't enlarge the request count in OSC pool according to
+        * cl_max_rpcs_in_flight. The allocation from the pool will only be
+        * tried after normal allocation failed. So a small OSC pool won't
+        * cause much performance degression in most of cases.
+        */
+       osc_reqpool_maxreqcount = reqpool_size / reqsize;
 
+       atomic_set(&osc_pool_req_count, 0);
+       osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
+                                         ptlrpc_add_rqs_to_pool);
+
+       if (osc_rq_pool != NULL)
+               GOTO(out, rc);
+       rc = -ENOMEM;
+out_type:
+       class_unregister_type(LUSTRE_OSC_NAME);
+out_kmem:
+       lu_kmem_fini(osc_caches);
+out:
        RETURN(rc);
 }
 
@@ -2917,6 +2918,7 @@ static void /*__exit*/ osc_exit(void)
 {
        class_unregister_type(LUSTRE_OSC_NAME);
        lu_kmem_fini(osc_caches);
+       ptlrpc_free_rq_pool(osc_rq_pool);
 }
 
 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");