Date: Fri, 17 Aug 2007 01:18:16 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Oliver Fromme <olli@lurza.secnetix.de> Cc: freebsd-stable@freebsd.org Subject: Re: panic after removing usb flash disk Message-ID: <Pine.BSF.3.96.1070817004731.21427D-100000@gaia.nimnet.asn.au> In-Reply-To: <200708161437.l7GEb2KV006533@lurza.secnetix.de>
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On Thu, 16 Aug 2007, Oliver Fromme wrote:
> Roman Bogorodskiy wrote:
> > Artem Kuchin wrote:
> > > [FreeBSD crashes when a mounted device disappears]
> >
> > It's not a bug, it's a feature.
>
> I certainly wouldn't call it a feature. As others have
> noted, it is a known shortcoming in FreeBSD, and fixing
> it is non-trivial.
>
> Always remember to umount devices before removing them.
And don't ever allow a laptop with mounted (uhci, at least) USB device
to suspend; daX won't be accessible when it resumes, and not unloading
then reloading usb in rc.{suspend,resume} fails too. umount panics.
> Using amd(8) with a short timeout can help somewhat.
Will try next time; it might help with the suspend/resume issue if
it's been auto-unmounted, especially for idle timeout suspension.
Thanks, Ian
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