From: Oliver Neukum <oliver@neukum.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Hans de Bruin <bruinjm@xs4all.nl>, linux-kernel@vger.kernel.org
Subject: Re: Kernelmessage to usbstick?
Date: Sat, 10 Jan 2009 23:58:00 +0100 [thread overview]
Message-ID: <200901102358.00984.oliver@neukum.org> (raw)
In-Reply-To: <873afqhixw.fsf@basil.nowhere.org>
Am Saturday 10 January 2009 23:53:15 schrieb Andi Kleen:
> Hans de Bruin <bruinjm@xs4all.nl> writes:
>
> > Would it be possible to send kernel messages to an usbstick? On
> > poweroff my laptop displays a kernel trace and a final message:
> > poweroff[3114] exited with preempt_count 2
> > /etc/rc.d/rc.0: line 265: 3114 Segementation fault /sbin/poweroff.
> > I don't have a serial cable within reach, but plenty of usbsticks.
>
> There's a mtdoops.c indeed, but it currently only works on
> MTD controlled flash devices, not usb sticks.
>
> However usb sticks would need the USB subsystem to be running and it's
> unlikely that will be the case really late in poweroff. So it might
> not help.
USB in turn needs PCI, interrupts and DMA.
Regards
Oliver
next prev parent reply other threads:[~2009-01-10 22:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-10 19:13 Hans de Bruin
2009-01-10 22:53 ` Andi Kleen
2009-01-10 22:58 ` Oliver Neukum [this message]
2009-01-11 13:18 ` Hans de Bruin
2009-01-11 18:07 ` Mark Lord
2009-01-13 21:31 ` Hans de Bruin
2009-01-18 8:14 ` Pavel Machek
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