LU-2793 fld: send special seq lookup request to MDT0

[fs/lustre-release.git] / lustre / fld / fld_request.c

diff --git a/lustre/fld/fld_request.c b/lustre/fld/fld_request.c
index 1b43b3d..55e93cb 100644 (file)
--- a/lustre/fld/fld_request.c
+++ b/lustre/fld/fld_request.c
@@ -130,7 +130,15 @@ fld_rrb_scan(struct lu_client_fld *fld, seqno_t seq)
         int hash;
         ENTRY;
 
-        hash = fld_rrb_hash(fld, seq);
+       /* Because almost all of special sequence located in MDT0,
+        * it should go to index 0 directly, instead of calculating
+        * hash again, and also if other MDTs is not being connected,
+        * the fld lookup requests(for seq on MDT0) should not be
+        * blocked because of other MDTs */
+       if (fid_seq_is_norm(seq))
+               hash = fld_rrb_hash(fld, seq);
+       else
+               hash = 0;
 
         cfs_list_for_each_entry(target, &fld->lcf_targets, ft_chain) {
                 if (target->ft_idx == hash)