From: Ted Ts'o <tytso@mit.edu>
To: NeilBrown <neilb@suse.de>
Cc: Tejun Heo <tj@kernel.org>, Milan Broz <mbroz@redhat.com>,
Karel Zak <kzak@redhat.com>,
device-mapper development <dm-devel@redhat.com>,
Jun'ichi Nomura <j-nomura@ce.jp.nec.com>,
Valdis.Kletnieks@vt.edu, linux-kernel@vger.kernel.org,
linux-raid@vger.kernel.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org, Kay Sievers <kay.sievers@vrfy.org>
Subject: Re: [dm-devel] linux-next - WARNING: at fs/block_dev.c:824 bd_link_disk_holder+0x92/0x1ac()
Date: Thu, 13 Jan 2011 15:41:45 -0500 [thread overview]
Message-ID: <20110113204145.GC31800@thunk.org> (raw)
In-Reply-To: <20110114071858.7eee145c@notabene.brown>
On Fri, Jan 14, 2011 at 07:18:58AM +1100, NeilBrown wrote:
>
> open(O_EXCL) will fail on a block device if it is being used by anything else
> - a filesystem or a dm target or an md array or ....
>
> So if the *only* thing you want is "is this currently an active part of
> something else", then O_EXCL works since 2.6.0 (I think).
Unfortunately, that won't distinguish between a currently active file
system, and a device which is being used by a dm target, which is what
we want to do.
- Ted
next prev parent reply other threads:[~2011-01-13 20:41 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-12 17:34 linux-next - WARNING: at fs/block_dev.c:824 bd_link_disk_holder+0x92/0x1ac() Valdis.Kletnieks
2011-01-13 0:23 ` Milan Broz
2011-01-13 2:19 ` Jun'ichi Nomura
2011-01-13 11:06 ` Tejun Heo
2011-01-13 11:26 ` [dm-devel] " Milan Broz
2011-01-13 12:27 ` Karel Zak
2011-01-13 13:12 ` Tejun Heo
2011-01-13 13:26 ` Karel Zak
2011-01-13 13:37 ` Tejun Heo
2011-01-13 13:52 ` Tejun Heo
2011-01-13 13:58 ` Milan Broz
2011-01-13 14:11 ` Tejun Heo
2011-01-13 14:25 ` Milan Broz
2011-01-13 14:30 ` Tejun Heo
2011-01-13 14:43 ` Kay Sievers
2011-01-13 15:03 ` Milan Broz
2011-01-14 7:38 ` Jun'ichi Nomura
2011-01-13 15:59 ` Karel Zak
2011-01-13 16:10 ` [dm-devel] " Kay Sievers
2011-01-14 15:07 ` Karel Zak
2011-01-14 15:23 ` Kay Sievers
2011-01-13 14:45 ` Theodore Tso
2011-01-13 20:18 ` NeilBrown
2011-01-13 20:41 ` Ted Ts'o [this message]
2011-01-14 16:20 ` Tejun Heo
[not found] ` <20110114162022.GC978@htj.dyndns.org>
2011-01-14 17:59 ` Ted Ts'o
2011-01-14 18:23 ` Tejun Heo
2011-01-13 14:49 ` Milan Broz
2011-01-14 16:35 ` Tejun Heo
2011-01-13 17:21 ` [PATCH] block: restore multiple bd_link_disk_holder() support Tejun Heo
2011-01-13 18:42 ` Milan Broz
2011-01-14 7:31 ` Jun'ichi Nomura
2011-01-14 16:10 ` [PATCH UPDATED] " Tejun Heo
2011-01-14 21:09 ` Milan Broz
2011-01-17 0:18 ` Jun'ichi Nomura
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