On Thu, 19 Jul 2007 09:02:50 -0600 (MDT)
"M. Warner Losh" <[EMAIL PROTECTED]> wrote:
> In message: <[EMAIL PROTECTED]>
> Momchil Ivanov <[EMAIL PROTECTED]> writes:
> : What is then the reason for the kernel not being able to unmount a
> : filesystem whose provider is no longer present?
>
> The problem is that the device driver has wound down, deallocated
> memory, etc. Now the kernel comes along with stale references to the
> device and panic ensues. It is really just that simple. There's no
> replacement of the now-dead device with dead calls.
>
> And even if you fixed that, most of the file systems in the tree today
> do not tolerate errors on writes at all and that also leads to
> panics. This is why firewire freezes the I/Os rather than failing
> them (and why umount -f on a firewire drive hangs).
Please point me to the correct RTFM, because I feel this worth it :)
Is there a reason why the kernel cannot check 'upwards' if a device is being
used, ie mounted ? and prevent the unloading of the device driver ?
thanks for your time illuminating this ignoramus :)
_________________________
{Beto|Norberto|Numard} Meijome
"Egotism is the anesthetic that dulls the pain of stupidity."
Frank Leahy
I speak for myself, not my employer. Contents may be hot. Slippery when wet.
Reading disclaimers makes you go blind. Writing them is worse. You have been
Warned.
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
