MTD - DOC 2000 freezes on umount

[Mark Richards]

Update... I have also discovered that sometimes the first umount works, but
a subsequent umount (preceded of course by a mount) also freezes.  In
addition, I also get an occasional freeze-up when issuing the mount command.

If I don't umount at the commandline, but instead call a reboot, the file
system umounts fine - question: since I have mounted the MTD manually, is it
considered part of the file system to be umounted when the machine shuts
down?

This is more a nuisance, as are the occasional freeze-ups I experience just
accessing the DOC once mounted, but since it's a departure from the previous
good performance, perhaps it's worth looking into?

Mark Richards


> -----Original Message-----
> From: linux-mtd-bounces at lists.infradead.org [mailto:linux-mtd-
> bounces at lists.infradead.org] On Behalf Of Mark Richards
> Sent: Monday, January 19, 2004 21:23
> To: linux-mtd at lists.infradead.org
> Subject: MTD - DOC 2000 freezes on umount
> 
> I've been through several good learning experiences getting my development
> system set up to work with a DOC 2000 for an embedded project.  I've
> finally
> settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked
> well
> with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2, but
> for reasons I can't yet fathom, the MTD drivers seem a bit unstable in
> this
> particular kernel.
> 
> Most frequently when I perform a umount /mnt/doc (doc being the mount
> point)
> the shell session freezes (the umount command does not return a prompt).
> 
> If I then perform a sfdisk -l /dev/nftla the command again goes off into
> space with no return data.
> 
> Then the shut down hangs up.
> 
> I tried in one kernel build to apply the latest sources to my source tree
> using the instructions (and the shell script) but this caused a compile
> failure.
> 
> May I have some suggestions as to how I can further diagnose this problem,
> or what I can do to provide information that will help?
> 
> Many thanks,
> 
> Mark
> 
> 
> 
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