diff options
| author | Boris Protopopov <[email protected]> | 2014-03-22 05:07:14 -0400 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-03-10 09:49:22 -0800 |
| commit | a0bd735adb1b1eb81fef10b4db102ee051c4d4ff (patch) | |
| tree | 121fcde3000a116f0c33143b28a530a87fd6073a /include/sys/spa_impl.h | |
| parent | eb0856779f7b57162c9179f238104f6d6e150745 (diff) | |
Add support for asynchronous zvol minor operations
zfsonlinux issue #2217 - zvol minor operations: check snapdev
property before traversing snapshots of a dataset
zfsonlinux issue #3681 - lock order inversion between zvol_open()
and dsl_pool_sync()...zvol_rename_minors()
Create a per-pool zvol taskq for asynchronous zvol tasks.
There are a few key design decisions to be aware of.
* Each taskq must be single threaded to ensure tasks are always
processed in the order in which they were dispatched.
* There is a taskq per-pool in order to keep the pools independent.
This way if one pool is suspended it will not impact another.
* The preferred location to dispatch a zvol minor task is a sync
task. In this context there is easy access to the spa_t and
minimal error handling is required because the sync task must
succeed.
Support for asynchronous zvol minor operations address issue #3681.
Signed-off-by: Boris Protopopov <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #2217
Closes #3678
Closes #3681
Diffstat (limited to 'include/sys/spa_impl.h')
| -rw-r--r-- | include/sys/spa_impl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sys/spa_impl.h b/include/sys/spa_impl.h index 0bb6dccdc..759c3472f 100644 --- a/include/sys/spa_impl.h +++ b/include/sys/spa_impl.h @@ -23,6 +23,7 @@ * Copyright (c) 2011, 2015 by Delphix. All rights reserved. * Copyright 2011 Nexenta Systems, Inc. All rights reserved. * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. + * Copyright (c) 2016 Actifio, Inc. All rights reserved. */ #ifndef _SYS_SPA_IMPL_H @@ -253,6 +254,7 @@ struct spa { uint64_t spa_errata; /* errata issues detected */ spa_stats_t spa_stats; /* assorted spa statistics */ hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ + taskq_t *spa_zvol_taskq; /* Taskq for minor managment */ /* * spa_refcount & spa_config_lock must be the last elements |