Hi Jan,
I found that if the process doesn't close the file after usb disk is
unplugged, generic_shutdown_super won't be invoked.
generic_shutdown_super will be invoked right after all opened files are
closed.
Regards,
Colin
----- Original Message -----
From: "Jan Engelhardt" <[email protected]>
To: "colin" <[email protected]>
Cc: <[email protected]>
Sent: Friday, June 16, 2006 11:34 PM
Subject: Re: Solve the problem that umount will fail when an opened file
isn't closed
> >
> >Hi all,
> >I have implemented an auto-mount & auto-umount facility based on USB
> >hotplug.
> >An annoying problem will occur when some process doesn't close its open
file
> >and auto-umount is trying to umount that mount point after usb disk has
been
> >unplugged.
> >Is there any way to force it to be umounted in this situation?
> >
>
> fs/super.c:
>
> /* Forget any remaining inodes */
> if (invalidate_inodes(sb)) {
> printk("VFS: Busy inodes after unmount of %s. "
> "Self-destruct in 5 seconds. Have a nice day...\n",
> sb->s_id);
> }
>
> That's what happens if you eject a CD. The box won't explode though.
>
>
> Jan Engelhardt
> --
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