[parisc-linux] Bug report: 2.6.15 crash when accessing nbd on a 712.

[Grant Grundler]

On Thu, Mar 09, 2006 at 10:47:50AM -0500, Kyle McMartin wrote:
> On Mon, Mar 06, 2006 at 11:35:53PM +0100, Vincent Stehl? wrote:
> > I tried to have nbd in module or not, but this does not change anything.
> >
> 
> Grant and I fixed this a couple weeks ago:
> http://cvs.parisc-linux.org/linux-2.6/arch/parisc/mm/init.c?r1=1.22&r2=1.23

Kyle,
But the 712 doesn't have an IOMMU.
Comment in the diff says:
	/* IOMMU is always used to access "high mem" on those boxes
	* that can support enough mem that a PCI device couldn't
	* directly DMA to any physical addresses.
	* ISA DMA support will need to revisit this.
	*/

> Please try a newer kernel, such as this one:
> http://cvs.parisc-linux.org/download/linux-2.6/autobuild/712_defconfig/palinux-712-defconfig-2.6.15-pa4_0-2_all.deb

Vincent,
In case the newer kernel doesn't take care of it, can you manually copy
down a few key lines of the panic: panic reason, IOAQ, top three lines
of stack backtrace, gr24, gr25, gr26.

thanks,
grant