From: Michael Marxmeier <mike@marxmeier.com>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] LVM and inactive snapshots.
Date: Thu, 14 Dec 2000 14:14:57 MEZ [thread overview]
Message-ID: <200012141314.OAA23601@e35.marxmeier.com> (raw)
In-Reply-To: <Pine.OSF.4.21.0012132236390.7029-100000@lazy.accessus.net>; from "Jay Weber" at Dec 13, 100 10:46 pm
> Given the above I'm curious as to how others view this behaviour. I'm
> thinking along the lines of: If the snapshot goes inactive and it's
> portrayal of the filesystem is no longer valid it should go away. Go away
> meaning, if an inactive snapshot volume is currently mounted possibly we
> should forcefully unmount it as well as cleaning up it's device node
> entries and removing it as a block device.
>
> Does that seem proper?
No. The kernel should not unmount because this may cause
confusion and possibly corruption of user mode information
(eg. /etc/mtab).
If a snapshot is dead the kernel could simply return an error
(EIO?) for any access to the snapshot (which no longer exists).
So the bahaviour would be well defined.
Michael
--
Michael Marxmeier Marxmeier Software AG
E-Mail: mike@msede.com Besenbruchstrasse 9
Phone : +49 202 2431440 42285 Wuppertal, Germany
Fax : +49 202 2431420 http://www.msede.com/
next prev parent reply other threads:[~2000-12-14 13:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-12-14 4:46 [linux-lvm] LVM and inactive snapshots Jay Weber
2000-12-14 4:51 ` Jay Weber
2000-12-14 13:14 ` Michael Marxmeier [this message]
2000-12-14 21:10 ` Jay Weber
2000-12-15 10:00 ` Patrick Caulfield
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