Illumos #3955

[mirror_zfs.git] / module / zfs / dmu_tx.c

diff --git a/module/zfs/dmu_tx.c b/module/zfs/dmu_tx.c
index 7ee214bb0effb507a7f79700582e63e2bb1eb33e..5e4a5cbbe43a82eb14e1c5b1a09966a97960b4cc 100644 (file)
--- a/module/zfs/dmu_tx.c
+++ b/module/zfs/dmu_tx.c
@@ -465,12 +465,12 @@ dmu_tx_count_free(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
                blkid = off >> dn->dn_datablkshift;
                nblks = (len + dn->dn_datablksz - 1) >> dn->dn_datablkshift;
 
-               if (blkid >= dn->dn_maxblkid) {
+               if (blkid > dn->dn_maxblkid) {
                        rw_exit(&dn->dn_struct_rwlock);
                        return;
                }
                if (blkid + nblks > dn->dn_maxblkid)
-                       nblks = dn->dn_maxblkid - blkid;
+                       nblks = dn->dn_maxblkid - blkid + 1;
 
        }
        l0span = nblks;    /* save for later use to calc level > 1 overhead */