Re: Debian SID kernel results in "Fast Data Access MMU Miss" on Sun Ultra 30

On Tue, Jul 25, 2023 at 12:36:57PM +0000, Ignacio Soriano Hernandez wrote:
> Hi,
> 
> interesting error as the latest Openindiana/SPARC (Beta)  (https://dlc.openindiana.aurora-opencloud.org/SPARC/release) was showing the same error BUT in a MP environment.
> 
> ERROR: Last Trap: Fast Data Access MMU Miss
> 
> Cheers
> 
> Iggi
> 
> 
> Am 25.07.23, 12:07 schrieb "Joacim Nilsson" <[email protected] <mailto:[email protected]>>:
> 
> 
> On Mon, Jul 24, 2023 at 03:46:12PM -0600, Stan Johnson wrote:
> > Hello,
> > 
> > The latest Debian SID kernel (vmlinux-6.4.0-1-sparc64) fails on a Sun
> > Ultra 30 with the following error at the PROM:
> > 
> > -----
> > ...
> > Loaded kernel version 6.4.4
> > Loading initial ramdisk (23022746 bytes at 0x64000000 phys, 0x40C00000
> > virt)...
> > Fast Data Access MMU Miss
> > ok
> > -----
> > 
> > I have been running a custom 6.2.10 kernel, and that continues to work.
> > I'm not sure whether this is related to Joacim Nilsson's cgroup fail
> > error on his Sun Ultra 5, but the failure message is different. I'll
> > have to investigate whether this could be a kernel regression.
> > 
> > The previous Debian SID kernel that I have is vmlinux-6.1.0-7-sparc64,
> > and it also results in the "Fast Data Access MMU Miss" error.
> > 
> > An earlier kernel (vmlinux-5.16.0-6-sparc64) works as expected:
> > 
> > # uname -a
> > Linux ultra-30 5.16.0-6-sparc64 #1 Debian 5.16.18-1 (2022-03-29) sparc64
> > GNU/Linux
> > 
> > # cat /proc/cpuinfo
> > cpu : TI UltraSparc II (BlackBird)
> > fpu : UltraSparc II integrated FPU
> > pmu : ultra12
> > prom : OBP 3.9.5 1997/04/11 10:03
> > type : sun4u
> > ncpus probed : 1
> > ncpus active : 1
> > D$ parity tl1 : 0
> > I$ parity tl1 : 0
> > Cpu0ClkTck : 0000000011a4783f
> > cpucaps : flush,stbar,swap,muldiv,v9,mul32,div32,v8plus,vis
> > MMU Type : Spitfire
> > MMU PGSZs : 8K,64K,512K,4MB
> > 
> > root@ultra-30:~# cat /proc/swaps
> > Filename Type Size Used Priority
> > /dev/sda2 partition 1052248 0 -2
> > 
> > # fdisk -l
> > Disk /dev/sda: 136.73 GiB, 146815737856 bytes, 286749488 sectors
> > Disk model: ST3146807LC
> > Geometry: 255 heads, 63 sectors/track, 17849 cylinders
> > Units: sectors of 1 * 512 = 512 bytes
> > Sector size (logical/physical): 512 bytes / 512 bytes
> > I/O size (minimum/optimal): 512 bytes / 512 bytes
> > Disklabel type: sun
> > 
> > Device Start End Sectors Size Id Type Flags
> > /dev/sda1 0 1060289 1060290 517.7M 1 Boot
> > /dev/sda2 1060290 3164804 2104515 1G 82 Linux swap
> > /dev/sda3 0 286744184 286744185 136.7G 5 Whole disk
> > /dev/sda4 3164805 19936664 16771860 8G 83 Linux native
> > /dev/sda5 19936665 53496449 33559785 16G 83 Linux native
> > /dev/sda6 53496450 87056234 33559785 16G 83 Linux native
> > /dev/sda7 87056235 103828094 16771860 8G 83 Linux native
> > /dev/sda8 103828095 286744184 182916090 87.2G 83 Linux native
> > 
> > -Stan
> > 
> I will install Debian on my Sun Fire V440 and se whats happen
> 
> 
> -- 
> Mvh
> Joacim Nilsson
> [email protected] <mailto:[email protected]>
> 
> 
> 
> 
My SunFire V440 fails in a similar way as my U5.
I dont get any errors bouncing me back to the ok promt though.
Let me know if you want any logs or anything.