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From: "Hua Zhong" <hzhong@cisco.com>
To: "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: RE: dirty buffers and umount/remount
Date: Tue, 11 Jun 2002 01:12:10 -0700
Message-ID: <FEEFKBEFIEBONNKJABKDEEHKDNAA.hzhong@cisco.com>
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> I am wondering if 3) is necessary or not. When the filesystem is remounted
> from rw to ro, are all dirty buffers related to it flushed to disk? How
> about umount?
>
> The last related question: is the kdev field in the buffer head
> the physical
> block device (i.e., /dev/hda) or the logical block device (i.e.,
> /dev/hda7)?

auh..it must be the logical device which is passed as the mount point..

I also checked the mount/umount code, and didn't find any part does the
flush.
So I guess data can still be lost after an unmount?

> Thanks a lot.
>
> Hua
>
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