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 id 1ZMFoG-00034X-FL; Mon, 03 Aug 2015 15:29:44 +0200
Date: Mon, 3 Aug 2015 15:29:45 +0200
From: Fabian Keil <freebsd-listen@fabiankeil.de>
To: Andriy Gapon <avg@FreeBSD.org>
Cc: "svn-src-head@freebsd.org" <svn-src-head@FreeBSD.org>
Subject: Re: svn commit: r285021 -
 head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
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Andriy Gapon <avg@FreeBSD.org> wrote:

> On 30/07/2015 10:24, K. Macy wrote:
> > Just FYI this change introduces a deadlock with with the
> > spa_namespace_lock. Mount will be holding this lock while trying to
> > acquire the spa_namespace_lock. zfskern on the other hand holds the
> > spa_namespace_lock when calling zfs_freebsd_access  which in turn
> > tries to acquire the teardown lock.
>=20
> I missed the fact that zpool.cache file is being written with spa_namespa=
ce_lock
> held.
> I'll try to either resolve the problem in the next day or I will revert t=
he change.

BTW, there's another (unrelated) spa_namespace_lock issue in spa_import_roo=
tpool():
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D198563

Fabian

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