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Illumos 5911 - ZFS "hangs" while deleting file

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5911 ZFS "hangs" while deleting file
Reviewed by: Bayard Bell <buffer.g.overflow@gmail.com>
Reviewed by: Alek Pinchuk <alek@nexenta.com>
Reviewed by: Simon Klinkert <simon.klinkert@gmail.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/5911
  https://github.com/illumos/illumos-gate/commit/46e1baa

Porting notes:

Resolved ISO C90 forbids mixed declarations and code wanting in
the dnode_free_range() function.

Ported-by: kernelOfTruth kerneloftruth@gmail.com
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3554
This commit is contained in:
Matthew Ahrens
2015-07-02 18:23:20 +02:00
committed by Brian Behlendorf
parent 5e8cd5d17f
commit 4bda3bd0e7
5 changed files with 91 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/dbuf.c
+20 -14
View File
@@ -21,7 +21,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
* Copyright (c) 2012, 2015 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
*/
@@ -1455,6 +1455,16 @@ dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
dbuf_dirty_record_t *dr, **drp;
ASSERT(txg != 0);
/*
* Due to our use of dn_nlevels below, this can only be called
* in open context, unless we are operating on the MOS.
* From syncing context, dn_nlevels may be different from the
* dn_nlevels used when dbuf was dirtied.
*/
ASSERT(db->db_objset ==
dmu_objset_pool(db->db_objset)->dp_meta_objset ||
txg != spa_syncing_txg(dmu_objset_spa(db->db_objset)));
ASSERT(db->db_blkid != DMU_BONUS_BLKID);
ASSERT0(db->db_level);
ASSERT(MUTEX_HELD(&db->db_mtx));
@@ -1477,11 +1487,8 @@ dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
ASSERT(db->db.db_size != 0);
/*
* Any space we accounted for in dp_dirty_* will be cleaned up by
* dsl_pool_sync(). This is relatively rare so the discrepancy
* is not a big deal.
*/
dsl_pool_undirty_space(dmu_objset_pool(dn->dn_objset),
dr->dr_accounted, txg);
*drp = dr->dr_next;
@@ -1496,7 +1503,7 @@ dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
list_remove(&dr->dr_parent->dt.di.dr_children, dr);
mutex_exit(&dr->dr_parent->dt.di.dr_mtx);
} else if (db->db_blkid == DMU_SPILL_BLKID ||
db->db_level+1 == dn->dn_nlevels) {
db->db_level + 1 == dn->dn_nlevels) {
ASSERT(db->db_blkptr == NULL || db->db_parent == dn->dn_dbuf);
mutex_enter(&dn->dn_mtx);
list_remove(&dn->dn_dirty_records[txg & TXG_MASK], dr);
@@ -1513,11 +1520,6 @@ dbuf_undirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
VERIFY(arc_buf_remove_ref(dr->dt.dl.dr_data, db));
}
if (db->db_level != 0) {
mutex_destroy(&dr->dt.di.dr_mtx);
list_destroy(&dr->dt.di.dr_children);
}
kmem_free(dr, sizeof (dbuf_dirty_record_t));
ASSERT(db->db_dirtycnt > 0);
@@ -2603,7 +2605,7 @@ dbuf_sync_indirect(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
zio = dr->dr_zio;
mutex_enter(&dr->dt.di.dr_mtx);
dbuf_sync_list(&dr->dt.di.dr_children, tx);
dbuf_sync_list(&dr->dt.di.dr_children, db->db_level - 1, tx);
ASSERT(list_head(&dr->dt.di.dr_children) == NULL);
mutex_exit(&dr->dt.di.dr_mtx);
zio_nowait(zio);
@@ -2754,7 +2756,7 @@ dbuf_sync_leaf(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
}
void
dbuf_sync_list(list_t *list, dmu_tx_t *tx)
dbuf_sync_list(list_t *list, int level, dmu_tx_t *tx)
{
dbuf_dirty_record_t *dr;
@@ -2771,6 +2773,10 @@ dbuf_sync_list(list_t *list, dmu_tx_t *tx)
DMU_META_DNODE_OBJECT);
break;
}
if (dr->dr_dbuf->db_blkid != DMU_BONUS_BLKID &&
dr->dr_dbuf->db_blkid != DMU_SPILL_BLKID) {
VERIFY3U(dr->dr_dbuf->db_level, ==, level);
}
list_remove(list, dr);
if (dr->dr_dbuf->db_level > 0)
dbuf_sync_indirect(dr, tx);