Re: Kernel Oops on alpha with kernel version >=6.9.x

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

Hi Magnus and Michael,

On Mon, 2024-12-09 at 12:18 +1300, Michael Cree wrote:
> On Sun, Dec 08, 2024 at 10:39:30PM +0100, Magnus Lindholm wrote:
> > some updates:
> > 
> > I've been building gcc from git and this is what I've seen so far:
> > (GCC) 14.2.1 20241208 does NOT work
> > (GCC) 15.0.0 20241208 (experimental): works!
> > 
> > Seems like this bug gets fixed in the 15.x branch!
> > I need to find the commit that fixes this...
> 
> Maybe, maybe not.  Building 6.11.11 with alpha-linux-gnu-gcc-9
> (Debian 9.3.0-22) fixed the null pointer access in the scsi
> subsystem, and finally I have a bootable system! (Tested on ES45.)
> But I now get a null pointer access when network driver loaded:
> 
> [   34.501935] e100 0001:02:04.0 enP1p2s4: NIC Link is Up 100 Mbps Full Duplex
> [   40.692361] Unable to handle kernel paging request at virtual address 0000000000000000
> [   40.799783] CPU 1 
> [   40.799783] kworker/1:2(158): Oops -1

Maciej (CC'ed) is currently working on improving the Alpha backend in GCC and he would
need access to a real alpha machine to test his patches.

Would either of you be able to help him? I have taken my XP1000 out of storage yesterday,
but unfortunately it won't power on at the moment as the power supply needs to be serviced.

I have a 433au somewhere in my basement as well, but I haven't located it yet. But it would
also be better if Maciej could use a faster machine for his tests.

Thanks,
Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
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`. `'   Physicist
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