LU-14131 osd-ldiskfs: reduce credits for overwritting

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_io.c

diff --git a/lustre/osd-ldiskfs/osd_io.c b/lustre/osd-ldiskfs/osd_io.c
index d65421c..2814cfe 100644 (file)
--- a/lustre/osd-ldiskfs/osd_io.c
+++ b/lustre/osd-ldiskfs/osd_io.c
@@ -1154,6 +1154,13 @@ static int osd_declare_write_commit(const struct lu_env *env,
                quota_space += PAGE_SIZE;
        }
 
+       credits++; /* inode */
+       /*
+        * overwrite case, no need to modify tree and
+        * allocate blocks.
+        */
+       if (!newblocks)
+               goto out_declare;
        /*
         * each extent can go into new leaf causing a split
         * 5 is max tree depth: inode + 4 index blocks
@@ -1167,12 +1174,10 @@ static int osd_declare_write_commit(const struct lu_env *env,
                depth = ext_depth(inode);
                depth = max(depth, 1) + 1;
                newblocks += depth;
-               credits++; /* inode */
                credits += depth * 2 * extents;
        } else {
                depth = 3;
                newblocks += depth;
-               credits++; /* inode */
                credits += depth * extents;
        }
 
@@ -1196,6 +1201,7 @@ static int osd_declare_write_commit(const struct lu_env *env,
        else
                credits += newblocks;
 
+out_declare:
        osd_trans_declare_op(env, oh, OSD_OT_WRITE, credits);
 
        /* make sure the over quota flags were not set */