Re: Please validate test kernel on UltraSPARC machines

Hi Gregor,

On Mon, 2025-09-08 at 22:09 +0200, Gregor Riepl wrote:
> > Please ignore the 6.16 kernel and other kernels in my home directory. Just the
> > 6.12.38+1-sparc64-smp kernel was meant for testing.
> > 
> > Try power-cycling before booting the 6.12.38+1-sparc64-smp kernel.
> 
> Ok, so... after power-cycling the machine _completely_ and giving it a rest for 24h, it finally managed to boot. 🎉
> 
> Interestingly, I didn't get those weird uninitialized strings this time:
> 
> [  +0.161141] crc32c_sparc64: sparc64 crc32c opcode not available.
> [  +0.416989] EXT4-fs (dm-1): mounted filesystem 12345678-aaaa-bbbb-cccc-0123456789abc ro with ordered data mode. Quota mode: none.

Yes, we've got reports that clearing the NV-RAM can help in such cases.

> $ uname -a
> Linux kirara 6.12.38+1-sparc64-smp #1 SMP Debian 6.12.38-1+sparc64 (2025-07-16) sparc64 GNU/Linux
> 
> $ cat /proc/cpuinfo
> cpu             : TI UltraSparc IIIi (Jalapeno)
> fpu             : UltraSparc IIIi integrated FPU
> pmu             : ultra3i
> prom            : OBP 4.22.18 2006/08/09 20:17
> type            : sun4u
> ncpus probed    : 2
> ncpus active    : 2
> D$ parity tl1   : 0
> I$ parity tl1   : 0
> cpucaps         : flush,stbar,swap,muldiv,v9,ultra3,mul32,div32,v8plus,vis,vis2
> Cpu0ClkTck      : 0000000059a53800
> Cpu1ClkTck      : 0000000059a53800
> MMU Type        : Cheetah+
> MMU PGSZs       : 8K,64K,512K,4MB
> State:
> CPU0:           online
> CPU1:           online
> 
> It's not very stable, though... after writing a few things to disk, it oopses:
> 
> [ 2241.965943] Error: Driver 'ecpp' is already registered, aborting...
> [ 2242.049496] BUG: Bad page map in process modprobe  pte:104c64e0 pmd:06510000
> [ 2242.142616] page: refcount:1 mapcount:-1 mapping:000000007f685d2d index:0x6e pfn:0x8263
> [ 2242.248170] memcg:fff0000004aa6800
> [ 2242.293075] aops:ext4_exit_fs [ext4] ino:5e0354 dentry name(?):"ata_id"
> [ 2242.380456] flags: 0x400000000000082c(referenced|uptodate|lru|owner_2|zone=0)
> [ 2242.474602] raw: 400000000000082c 000c00000024ab98 000c00000024ac28 fff0000002a11df8
> [ 2242.576731] raw: 000000000000006e 0000000000000000 fffffffe00000001 fff0000004aa6800
> [ 2242.678904] raw: fff00000104c6000
> [ 2242.722544] page dumped because: bad pte
> [ 2242.774249] addr:000007feff8b2000 vm_flags:00100173 anon_vma:fff0001002c6ec98 mapping:0000000000000000 index:3ff7fffc
> [ 2242.914181] file:(null) fault:0x0 mmap:0x0 read_folio:0x0
> [ 2242.985384] CPU: 1 UID: 0 PID: 1267 Comm: modprobe Not tainted 6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2242.985397] Call Trace:
> [ 2242.985400] [<0000000000f11864>] dump_stack+0x8/0x18
> [ 2242.985421] [<00000000006ee4ac>] print_bad_pte+0x16c/0x1c0
> [ 2242.985435] [<00000000006f0134>] unmap_page_range+0x6d4/0x1140
> [ 2242.985446] [<00000000006f0c18>] unmap_single_vma.isra.0+0x78/0xe0
> [ 2242.985455] [<00000000006f10c0>] unmap_vmas+0x60/0x1a0
> [ 2242.985463] [<00000000006fdc74>] exit_mmap+0xd4/0x460
> [ 2242.985471] [<000000000046a23c>] __mmput+0x3c/0x140
> [ 2242.985486] [<000000000046a374>] mmput+0x34/0x60
> [ 2242.985495] [<0000000000473d5c>] do_exit+0x29c/0xae0
> [ 2242.985507] [<0000000000474764>] do_group_exit+0x24/0xa0
> [ 2242.985515] [<00000000004747fc>] sys_exit_group+0x1c/0x40
> [ 2242.985523] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2243.990833] Disabling lock debugging due to kernel taint
> [ 2244.061058] unrecognized swap entry 0x9c00000000000082
> [ 2244.128767] ------------[ cut here ]------------
> [ 2244.189626] WARNING: CPU: 1 PID: 1267 at mm/memory.c:1674 unmap_page_range+0x111c/0x1140
> [ 2244.296273] Modules linked in: parport_pc evdev st parport binfmt_misc flash sg drm drm_panel_orientation_quirks i2c_core configfs nfnetlink ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_mod sd_mod sr_mod cdrom ata_generic pata_ali ohci_pci libata ehci_pci mptsas mptscsih ehci_hcd ohci_hcd mptbase scsi_transport_sas scsi_mod tg3 usbcore libphy scsi_common usb_common [last unloaded: parport_pc]
> [ 2244.782469] CPU: 1 UID: 0 PID: 1267 Comm: modprobe Tainted: G    B              6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2244.782481] Tainted: [B]=BAD_PAGE
> [ 2244.782484] Call Trace:
> [ 2244.782487] [<0000000000f11864>] dump_stack+0x8/0x18
> [ 2244.782499] [<000000000046e15c>] __warn+0xdc/0x140
> [ 2244.782507] [<000000000046e26c>] warn_slowpath_fmt+0xac/0x140
> [ 2244.782514] [<00000000006f0b7c>] unmap_page_range+0x111c/0x1140
> [ 2244.782524] [<00000000006f0c18>] unmap_single_vma.isra.0+0x78/0xe0
> [ 2244.782532] [<00000000006f10c0>] unmap_vmas+0x60/0x1a0
> [ 2244.782541] [<00000000006fdc74>] exit_mmap+0xd4/0x460
> [ 2244.782548] [<000000000046a23c>] __mmput+0x3c/0x140
> [ 2244.782558] [<000000000046a374>] mmput+0x34/0x60
> [ 2244.782567] [<0000000000473d5c>] do_exit+0x29c/0xae0
> [ 2244.782576] [<0000000000474764>] do_group_exit+0x24/0xa0
> [ 2244.782584] [<00000000004747fc>] sys_exit_group+0x1c/0x40
> [ 2244.782592] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2244.782626] ---[ end trace 0000000000000000 ]---
> [ 2245.980840] ------------[ cut here ]------------
> [ 2246.041694] WARNING: CPU: 0 PID: 1267 at fs/ext4/inode.c:3569 ext4_dirty_folio+0x74/0xe0 [ext4]
> [ 2246.156656] Modules linked in: parport_pc evdev st parport binfmt_misc flash sg drm drm_panel_orientation_quirks i2c_core configfs nfnetlink ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_mod sd_mod sr_mod cdrom ata_generic pata_ali ohci_pci libata ehci_pci mptsas mptscsih ehci_hcd ohci_hcd mptbase scsi_transport_sas scsi_mod tg3 usbcore libphy scsi_common usb_common [last unloaded: parport_pc]
> [ 2246.642850] CPU: 0 UID: 0 PID: 1267 Comm: modprobe Tainted: G    B   W          6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2246.642865] Tainted: [B]=BAD_PAGE, [W]=WARN
> [ 2246.642870] Call Trace:
> [ 2246.642874] [<0000000000f11864>] dump_stack+0x8/0x18
> [ 2246.642897] [<000000000046e15c>] __warn+0xdc/0x140
> [ 2246.642907] [<000000000046e26c>] warn_slowpath_fmt+0xac/0x140
> [ 2246.642915] [<00000000102fde94>] ext4_dirty_folio+0x74/0xe0 [ext4]
> [ 2246.643005] [<00000000006acfbc>] folio_mark_dirty+0x3c/0xa0
> [ 2246.643026] [<00000000006f05a4>] unmap_page_range+0xb44/0x1140
> [ 2246.643041] [<00000000006f0c18>] unmap_single_vma.isra.0+0x78/0xe0
> [ 2246.643050] [<00000000006f10c0>] unmap_vmas+0x60/0x1a0
> [ 2246.643059] [<00000000006fdc74>] exit_mmap+0xd4/0x460
> [ 2246.643067] [<000000000046a23c>] __mmput+0x3c/0x140
> [ 2246.643084] [<000000000046a374>] mmput+0x34/0x60
> [ 2246.643093] [<0000000000473d5c>] do_exit+0x29c/0xae0
> [ 2246.643106] [<0000000000474764>] do_group_exit+0x24/0xa0
> [ 2246.643115] [<00000000004747fc>] sys_exit_group+0x1c/0x40
> [ 2246.643123] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2246.643139] ---[ end trace 0000000000000000 ]---
> [ 2248.004693] ------------[ cut here ]------------
> [ 2248.065428] WARNING: CPU: 0 PID: 1267 at fs/ext4/inode.c:3570 ext4_dirty_folio+0xb4/0xe0 [ext4]
> [ 2248.180112] Modules linked in: parport_pc evdev st parport binfmt_misc flash sg drm drm_panel_orientation_quirks i2c_core configfs nfnetlink ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_mod sd_mod sr_mod cdrom ata_generic pata_ali ohci_pci libata ehci_pci mptsas mptscsih ehci_hcd ohci_hcd mptbase scsi_transport_sas scsi_mod tg3 usbcore libphy scsi_common usb_common [last unloaded: parport_pc]
> [ 2248.666179] CPU: 0 UID: 0 PID: 1267 Comm: modprobe Tainted: G    B   W          6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2248.666191] Tainted: [B]=BAD_PAGE, [W]=WARN
> [ 2248.666194] Call Trace:
> [ 2248.666197] [<0000000000f11864>] dump_stack+0x8/0x18
> [ 2248.666209] [<000000000046e15c>] __warn+0xdc/0x140
> [ 2248.666216] [<000000000046e26c>] warn_slowpath_fmt+0xac/0x140
> [ 2248.666223] [<00000000102fded4>] ext4_dirty_folio+0xb4/0xe0 [ext4]
> [ 2248.666300] [<00000000006acfbc>] folio_mark_dirty+0x3c/0xa0
> [ 2248.666312] [<00000000006f05a4>] unmap_page_range+0xb44/0x1140
> [ 2248.666323] [<00000000006f0c18>] unmap_single_vma.isra.0+0x78/0xe0
> [ 2248.666332] [<00000000006f10c0>] unmap_vmas+0x60/0x1a0
> [ 2248.666340] [<00000000006fdc74>] exit_mmap+0xd4/0x460
> [ 2248.666347] [<000000000046a23c>] __mmput+0x3c/0x140
> [ 2248.666358] [<000000000046a374>] mmput+0x34/0x60
> [ 2248.666366] [<0000000000473d5c>] do_exit+0x29c/0xae0
> [ 2248.666375] [<0000000000474764>] do_group_exit+0x24/0xa0
> [ 2248.666383] [<00000000004747fc>] sys_exit_group+0x1c/0x40
> [ 2248.666392] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2248.666402] ---[ end trace 0000000000000000 ]---
> [ 2250.028415] BUG: Bad page state in process modprobe  pfn:08263
> [ 2250.105408] page: refcount:0 mapcount:-1 mapping:000000007f685d2d index:0x6e pfn:0x8263
> [ 2250.211036] aops:ext4_exit_fs [ext4] ino:5e0354 dentry name(?):"ata_id"
> [ 2250.298453] flags: 0x80c(referenced|uptodate|owner_2|zone=0)
> [ 2250.372998] raw: 000000000000080c 0000000000000100 0000000000000122 fff0000002a11df8
> [ 2250.475072] raw: 000000000000006e 0000000000000000 fffffffe00000000 0000000000000000
> [ 2250.577151] raw: fff00000104c6000
> [ 2250.620788] page dumped because: non-NULL mapping
> [ 2250.682688] Modules linked in: parport_pc evdev st parport binfmt_misc flash sg drm drm_panel_orientation_quirks i2c_core configfs nfnetlink ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_mod sd_mod sr_mod cdrom ata_generic pata_ali ohci_pci libata ehci_pci mptsas mptscsih ehci_hcd ohci_hcd mptbase scsi_transport_sas scsi_mod tg3 usbcore libphy scsi_common usb_common [last unloaded: parport_pc]
> [ 2251.168754] CPU: 1 UID: 0 PID: 1267 Comm: modprobe Tainted: G    B   W          6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2251.168768] Tainted: [B]=BAD_PAGE, [W]=WARN
> [ 2251.168772] Call Trace:
> [ 2251.168775] [<0000000000f11864>] dump_stack+0x8/0x18
> [ 2251.168794] [<0000000000717ff4>] bad_page+0xf4/0x120
> [ 2251.168805] [<000000000071d934>] free_unref_folios+0x6b4/0x860
> [ 2251.168815] [<00000000006b4788>] folios_put_refs+0x148/0x1a0
> [ 2251.168826] [<00000000007330e4>] free_pages_and_swap_cache+0x124/0x140
> [ 2251.168835] [<0000000000700c00>] tlb_flush_mmu+0xa0/0x1c0
> [ 2251.168845] [<00000000006f04b8>] unmap_page_range+0xa58/0x1140
> [ 2251.168857] [<00000000006f0c18>] unmap_single_vma.isra.0+0x78/0xe0
> [ 2251.168866] [<00000000006f10c0>] unmap_vmas+0x60/0x1a0
> [ 2251.168875] [<00000000006fdc74>] exit_mmap+0xd4/0x460
> [ 2251.168882] [<000000000046a23c>] __mmput+0x3c/0x140
> [ 2251.168897] [<000000000046a374>] mmput+0x34/0x60
> [ 2251.168906] [<0000000000473d5c>] do_exit+0x29c/0xae0
> [ 2251.168917] [<0000000000474764>] do_group_exit+0x24/0xa0
> [ 2251.168926] [<00000000004747fc>] sys_exit_group+0x1c/0x40
> [ 2251.168934] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2251.168949] BUG: Bad page state in process modprobe  pfn:08267
> [ 2252.627105] page: refcount:0 mapcount:-1 mapping:000000007f685d2d index:0x72 pfn:0x8267
> [ 2252.732632] aops:ext4_exit_fs [ext4] ino:5e0354 dentry name(?):"ata_id"
> [ 2252.819929] flags: 0x818(uptodate|dirty|owner_2|zone=0)
> [ 2252.888776] raw: 0000000000000818 0000000000000100 0000000000000122 fff0000002a11df8
> [ 2252.990880] raw: 0000000000000072 0000000000000000 fffffffe00000000 0000000000000000
> [ 2253.092937] raw: fff00000104ce000
> [ 2253.136593] page dumped because: non-NULL mapping
> [ 2253.198559] Modules linked in: parport_pc evdev st parport binfmt_misc flash sg drm drm_panel_orientation_quirks i2c_core configfs nfnetlink ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_mod sd_mod sr_mod cdrom ata_generic pata_ali ohci_pci libata ehci_pci mptsas mptscsih ehci_hcd ohci_hcd mptbase scsi_transport_sas scsi_mod tg3 usbcore libphy scsi_common usb_common [last unloaded: parport_pc]
> [ 2253.684620] CPU: 1 UID: 0 PID: 1267 Comm: modprobe Tainted: G    B   W          6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2253.684632] Tainted: [B]=BAD_PAGE, [W]=WARN
> [ 2253.684636] Call Trace:
> [ 2253.684638] [<0000000000f11864>] dump_stack+0x8/0x18
> [ 2253.684651] [<0000000000717ff4>] bad_page+0xf4/0x120
> [ 2253.684659] [<000000000071d934>] free_unref_folios+0x6b4/0x860
> [ 2253.684667] [<00000000006b4788>] folios_put_refs+0x148/0x1a0
> [ 2253.684676] [<00000000007330e4>] free_pages_and_swap_cache+0x124/0x140
> [ 2253.684684] [<0000000000700c00>] tlb_flush_mmu+0xa0/0x1c0
> [ 2253.684692] [<00000000006f04b8>] unmap_page_range+0xa58/0x1140
> [ 2253.684702] [<00000000006f0c18>] unmap_single_vma.isra.0+0x78/0xe0
> [ 2253.684711] [<00000000006f10c0>] unmap_vmas+0x60/0x1a0
> [ 2253.684719] [<00000000006fdc74>] exit_mmap+0xd4/0x460
> [ 2253.684726] [<000000000046a23c>] __mmput+0x3c/0x140
> [ 2253.684736] [<000000000046a374>] mmput+0x34/0x60
> [ 2253.684745] [<0000000000473d5c>] do_exit+0x29c/0xae0
> [ 2253.684754] [<0000000000474764>] do_group_exit+0x24/0xa0
> [ 2253.684762] [<00000000004747fc>] sys_exit_group+0x1c/0x40
> [ 2253.684771] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2253.685399] BUG: Bad rss-counter state mm:000000000d782b50 type:MM_FILEPAGES val:-3
> [ 2255.033530] EXT4-fs warning (device dm-1): mpage_prepare_extent_to_map:2509: inode #6161236: comm kworker/u8:0: page 114 does not have buffers attached
> [ 2255.066632] BUG: Bad rss-counter state mm:000000000d782b50 type:MM_ANONPAGES val:3
> [ 2255.485516] lp: driver loaded but no devices found
> [ 2255.558277] Unable to handle kernel NULL pointer dereference
> [ 2255.632864] tsk->{mm,active_mm}->context = 00000000000005e8
> [ 2255.706263] tsk->{mm,active_mm}->pgd = fff0000008ab0000
> [ 2255.775104]               \|/ ____ \|/
> [ 2255.775104]               "@'/ .. \`@"
> [ 2255.775104]               /_| \__/ |_\
> [ 2255.775104]                  \__U_/
> [ 2255.968848] hwinfo(1259): Oops [#1]
> [ 2256.014758] CPU: 1 UID: 0 PID: 1259 Comm: hwinfo Tainted: G    B   W          6.12.38+1-sparc64-smp #1  Debian 6.12.38-1+sparc64
> [ 2256.167278] Tainted: [B]=BAD_PAGE, [W]=WARN
> [ 2256.222351] TSTATE: 0000009911001605 TPC: 000000000052b79c TNPC: 000000000052b7a0 Y: 00000002    Tainted: G    B   W
> [ 2256.371421] TPC: <m_show+0x9c/0x200>
> [ 2256.418490] g0: 0000000000000000 g1: 0000000000000027 g2: 0000000000000000 g3: 0000000000000001
> [ 2256.533188] g4: fff0000008b960c0 g5: fff000103e582000 g6: fff0001002b78000 g7: 0000000000000031
> [ 2256.647923] o0: fff0001002cc0d20 o1: 00000000010f9830 o2: ffffffffffffffff o3: 0000000000000000
> [ 2256.762582] o4: 0000000000002000 o5: fff0000000006540 sp: fff0001002b7b0c1 ret_pc: 000000000052b780
> [ 2256.881853] RPC: <m_show+0x80/0x200>
> [ 2256.928892] l0: 00000000104ca400 l1: 00000000011b3000 l2: aa37751e815afc87 l3: 0000000000003fff
> [ 2257.043494] l4: 0000000000000005 l5: fff0000100034000 l6: 0000000025691921 l7: fff00000001b2f00
> [ 2257.158193] i0: fff0001002cc0d20 i1: 00000000104ca408 i2: fff0001002b7b978 i3: 00000000104ca828
> [ 2257.272897] i4: 00000000010f9838 i5: 0000000000000000 i6: fff0001002b7b191 i7: 00000000007be060
> [ 2257.387548] I7: <seq_read_iter+0x380/0x500>
> [ 2257.442638] Call Trace:
> [ 2257.474828] [<00000000007be060>] seq_read_iter+0x380/0x500
> [ 2257.547125] [<00000000007be2dc>] seq_read+0xfc/0x120
> [ 2257.612531] [<000000000082cf60>] proc_reg_read+0xa0/0xe0
> [ 2257.682535] [<0000000000786e44>] vfs_read+0x64/0x2e0
> [ 2257.747945] [<00000000007879b4>] ksys_read+0x54/0xe0
> [ 2257.813365] [<0000000000787a54>] sys_read+0x14/0x40
> [ 2257.877634] [<0000000000406274>] linux_sparc_syscall+0x34/0x44
> [ 2257.954511] Caller[00000000007be060]: seq_read_iter+0x380/0x500
> [ 2258.032527] Caller[00000000007be2dc]: seq_read+0xfc/0x120
> [ 2258.103671] Caller[000000000082cf60]: proc_reg_read+0xa0/0xe0
> [ 2258.179400] Caller[0000000000786e44]: vfs_read+0x64/0x2e0
> [ 2258.250545] Caller[00000000007879b4]: ksys_read+0x54/0xe0
> [ 2258.321688] Caller[0000000000787a54]: sys_read+0x14/0x40
> [ 2258.391715] Caller[0000000000406274]: linux_sparc_syscall+0x34/0x44
> [ 2258.474288] Caller[fff00001003a5348]: 0xfff00001003a5348
> [ 2258.544288] Instruction DUMP:
> [ 2258.544293]  02600050
> [ 2258.583342]  390043e6
> [ 2258.614303]  b8172038
> [ 2258.645328] <d45f6020>
> [ 2258.676379]  9210001c
> [ 2258.707409]  90100018
> [ 2258.738457]  400a483e
> [ 2258.769500]  9402a018
> [ 2258.800540]  fa5f4000
> [ 2258.831574]

This is most likely due to CONFIG_TRANSPARENT_HUGEPAGE being enabled. I'm currently
building a kernel package with the feature turned off. Kernel package should be
available in about an hour.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913