From: Christoph Hellwig <hch@infradead.org>
To: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>,
Dexuan Cui <decui@microsoft.com>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
'linux-ext4' <linux-ext4@vger.kernel.org>
Subject: Re: Can one file system be R/W mounted multiple times in Linux?
Date: Fri, 9 Jan 2015 06:55:46 -0800 [thread overview]
Message-ID: <20150109145546.GA26251@infradead.org> (raw)
In-Reply-To: <20150109120159.GA20300@stefanha-thinkpad.redhat.com>
On Fri, Jan 09, 2015 at 12:01:59PM +0000, Stefan Hajnoczi wrote:
> Can you explain under what conditions mounting the same file system
> twice will work?
>
> I guess the kernel is looking up the block device and then sharing the
> superblock if the file system is already mounted on this block device?
Exactly.
>
> If I use two loop devices for the same underlying storage it does not
> work:
Because that's very much the same situation as two different systems
trying to mount it.
next prev parent reply other threads:[~2015-01-09 14:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-09 3:44 Can one file system be R/W mounted multiple times in Linux? Dexuan Cui
2015-01-09 3:51 ` Al Viro
2015-01-09 4:58 ` Dexuan Cui
2015-01-09 6:04 ` Eric Sandeen
2015-01-09 6:48 ` Dexuan Cui
2015-01-09 13:25 ` Bob Peterson
2015-01-09 12:01 ` Stefan Hajnoczi
2015-01-09 14:55 ` Christoph Hellwig [this message]
2015-01-09 15:52 ` Lukáš Czerner
2015-01-09 19:31 ` Pranay Srivastava
2015-01-09 20:37 ` Al Viro
2015-01-10 3:52 ` Dexuan Cui
2015-01-12 13:00 ` Karel Zak
2015-01-12 14:20 ` Lukáš Czerner
2015-01-12 16:47 ` Karel Zak
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