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

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