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Illumos #3955

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3955 ztest failure: assertion refcount_count(&tx->tx_space_written) +
     delta <= tx->tx_space_towrite
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/3955
  illumos/illumos-gate@be9000cc67

Ported-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775
This commit is contained in:
Matthew Ahrens
2013-08-07 10:32:46 -08:00
committed by Brian Behlendorf
parent 9554185d90
commit 383fc4a997
2 changed files with 5 additions and 2 deletions
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module/zfs/dmu_tx.c
+2 -2
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@@ -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 */