RE: dirty buffers and umount/remount

[Hua Zhong]

> 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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