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zdb -L should skip leak detection altogether

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Currently the point of -L option in zdb is to  disable leak
tracing and the loading of space maps because they are expensive,
yet still do leak detection in terms of space. Unfortunately,
there is a scenario where this is a lie. If we are using zdb -L
on a pool where a vdev is being removed, zdb_claim_removing()
will open the metaslab space maps of that device.

This patch makes it so zdb -L skips leak detection altogether
and ensures that no space maps are loaded.

Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #8335
This commit is contained in:
Serapheim Dimitropoulos
2019-01-30 09:54:27 -08:00
committed by Brian Behlendorf
parent 466f55334a
commit 21e7cf5da8
2 changed files with 136 additions and 123 deletions
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man/man8/zdb.8
+2 -2
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@@ -10,7 +10,7 @@
.\"
.\"
.\" Copyright 2012, Richard Lowe.
.\" Copyright (c) 2012, 2017 by Delphix. All rights reserved.
.\" Copyright (c) 2012, 2018 by Delphix. All rights reserved.
.\" Copyright 2017 Nexenta Systems, Inc.
.\" Copyright (c) 2017 Lawrence Livermore National Security, LLC.
.\" Copyright (c) 2017 Intel Corporation.
@@ -194,7 +194,7 @@ If the
option is also specified, also display the uberblocks on this device. Specify
multiple times to increase verbosity.
.It Fl L
Disable leak tracing and the loading of space maps.
Disable leak detection and the loading of space maps.
By default,
.Nm
verifies that all non-free blocks are referenced, which can be very expensive.