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authorMatthew Ahrens <[email protected]>2017-03-20 18:36:00 -0700
committerBrian Behlendorf <[email protected]>2017-03-20 18:36:00 -0700
commit64fc776208ad14b0078b89317b0f3b24338e10c1 (patch)
treeb8c229ca8b052f3aa718a27b97c759a564c8fd78 /include/sys/zio.h
parenta3478c074752610814f894375c3d947ece4938fe (diff)
OpenZFS 7968 - multi-threaded spa_sync()
Reviewed by: Pavel Zakharov <[email protected]> Reviewed by: Brad Lewis <[email protected]> Reviewed by: Saso Kiselkov <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Ported-by: Matthew Ahrens <[email protected]> spa_sync() iterates over all the dirty dnodes and processes each of them by calling dnode_sync(). If there are many dirty dnodes (e.g. because we created or removed a lot of files), the single thread of spa_sync() calling dnode_sync() can become a bottleneck. Additionally, if many dnodes are dirtied concurrently in open context (e.g. due to concurrent file creation), the os_lock will experience lock contention via dnode_setdirty(). The solution is to track dirty dnodes on a multilist_t, and for spa_sync() to use separate threads to process each of the sublists in the multilist. OpenZFS-issue: https://www.illumos.org/issues/7968 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/4a2a54c Closes #5752
Diffstat (limited to 'include/sys/zio.h')
-rw-r--r--include/sys/zio.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/sys/zio.h b/include/sys/zio.h
index 1f8708e5a..dc6c46814 100644
--- a/include/sys/zio.h
+++ b/include/sys/zio.h
@@ -22,7 +22,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
- * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
+ * Copyright (c) 2012, 2017 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
*/
@@ -454,7 +454,7 @@ struct zio {
taskq_ent_t io_tqent;
};
-extern int zio_timestamp_compare(const void *, const void *);
+extern int zio_bookmark_compare(const void *, const void *);
extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
zio_done_func_t *done, void *private, enum zio_flag flags);