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Date: Mon, 9 Dec 2013 13:17:29 +0100
From: Stefan Hajnoczi <stefanha@gmail.com>
Message-ID: <20131209121729.GA9611@stefanha-thinkpad.redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] HMP: snapshot_blkdev can not consider
 //root/sn1 and /root/sn1 as the same file
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To: jun muzi <junmuzi@gmail.com>
Cc: lcapitulino@redhat.com, qemu-devel@nongnu.org, Max Reitz <mreitz@redhat.com>

On Mon, Dec 09, 2013 at 02:06:21PM +0800, jun muzi wrote:
> If mount a local file(disk) in two different dirctories, it is similar to the
> network storage. Detecting identical "files" is still a problem.
> Such as:
> dd if=/dev/zero of=aa bs=1M count=10
> mkfs.ext4 aa
> Then mount aa to two directories.
> mount aa /mnt/dir1
> mount aa /mnt/dir2

(Off-topic, but you should never mount a regular file system read/write
more than once at a time.  This example is wrong, it can corrupt the
file system.)

My question was about the bug.  What is the problem you are seeing and
how do you reproduce it (including the HMP commands)?

Stefan