LU-10894 dom: per-resource ELC for WRITE lock enqueue

[fs/lustre-release.git] / lustre / mdc / mdc_dev.c

diff --git a/lustre/mdc/mdc_dev.c b/lustre/mdc/mdc_dev.c
index 1adc457..a59b1a8 100644 (file)
--- a/lustre/mdc/mdc_dev.c
+++ b/lustre/mdc/mdc_dev.c
@@ -686,7 +686,8 @@ int mdc_enqueue_send(const struct lu_env *env, struct obd_export *exp,
        enum ldlm_mode mode;
        bool glimpse = *flags & LDLM_FL_HAS_INTENT;
        __u64 match_flags = *flags;
-       int rc;
+       struct list_head cancels = LIST_HEAD_INIT(cancels);
+       int rc, count;
 
        ENTRY;
 
@@ -744,7 +745,15 @@ no_match:
        if (req == NULL)
                RETURN(-ENOMEM);
 
-       rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
+       /* For WRITE lock cancel other locks on resource early if any */
+       if (einfo->ei_mode & LCK_PW)
+               count = mdc_resource_get_unused_res(exp, res_id, &cancels,
+                                                   einfo->ei_mode,
+                                                   MDS_INODELOCK_DOM);
+       else
+               count = 0;
+
+       rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
        if (rc < 0) {
                ptlrpc_request_free(req);
                RETURN(rc);