From: serue@us.ibm.com
To: Lai Zit Seng <lzs@pobox.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: pivot_root()
Date: Mon, 16 May 2005 08:56:45 -0500 [thread overview]
Message-ID: <20050516135645.GA5842@serge.austin.ibm.com> (raw)
In-Reply-To: <42887147.9000302@pobox.com>
Quoting Lai Zit Seng (lzs@pobox.com):
> Not sure where to post this, forgive me if there is a better place to
> post...
>
> I'm trying to use pivot_root() to change root to a directory that is not
> a mount point, i.e. it is under a mount point of a different device from
> the current root device.
>
> E.g.
>
> # /root is mounted from /dev/sda1
> pivot_root("/root/somewhere", "/root/somewhere/initrd");
>
> But pivot_root() returns EINVAL. Both /root/somewhere and
> /root/somewhere/initrd exists.
>
> Any pointers about what might be wrong? Many thanks :)
Try first doing
mount --bind <newroot> <newroot>
See the comments above fs/namespace.c:sys_pivot_root() for the
explanation.
-serge
next prev parent reply other threads:[~2005-05-16 13:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-16 10:09 pivot_root() Lai Zit Seng
2005-05-16 13:56 ` serue [this message]
2005-05-16 15:07 ` pivot_root() Lai Zit Seng
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