On my SS20 I get the following oops when doing a 'make C=2' using 2.6.17:
CHECK arch/sparc/kernel/sun4d_irq.c
arch/sparc/kernel/sun4d_irq.c:485:18: warning: cast removes address space of expression
CC arch/sparc/kernel/sun4d_irq.o
Unable to handle kernel paging request at virtual address fffff000
tsk->{mm,active_mm}->context = 00000432
tsk->{mm,active_mm}->pgd = fc08f400
\|/ ____ \|/
"@'/ ,. \`@"
/_| \__/ |_\
\__U_/
kswapd0(10): Oops [#1]
PSR: 401010c1 PC: f0060dcc NPC: f0060dd0 Y: 00000000 Not tainted
PC: <page_referenced_one+0x4/0x108>
%G: 00029121 00000001 00000000 f25a0f88 f0056c10 c0000040 f086a000 c0000040
%O: 00000000 003a6000 003a6000 00000432 00000000 00000000 f086bc08 f00d8350
RPC: <__atomic_add_return+0x1c/0x2c>
%L: 003a6000 f2a79000 f0166d28 00000010 00000020 00000000 f2804000 00000000
%I: f07acb60 ffffffc8 f086bcdc 00000006 61736d2f 6c696e75 f086bc78 f0060f14
Caller[f0060f14]: page_referenced_anon+0x44/0x78
Caller[f00610cc]: page_referenced+0xb0/0xc4
Caller[f00573c8]: shrink_active_list+0x460/0x498
Caller[f00574a0]: shrink_zone+0xa0/0x114
Caller[f0057a8c]: balance_pgdat+0x2d8/0x3b4
Caller[f0057c48]: kswapd+0xe0/0x100
Caller[f0014b74]: kernel_thread+0x34/0x50
Caller[f01cc278]: init_bootmem_node+0x4/0x10
Caller[00000000]: start+0xfffc000/0x10
Instruction DUMP: 81c7e008 81e80000 9de3bf90 <c2066004> c4062014 c6066048 90100018 84208003 e2064000
Unable to handle kernel paging request at virtual address fffff000
tsk->{mm,active_mm}->context = 00000432
tsk->{mm,active_mm}->pgd = fc08f400
\|/ ____ \|/
"@'/ ,. \`@"
/_| \__/ |_\
\__U_/
cc1(598): Oops [#2]
PSR: 401010c4 PC: f0060dcc NPC: f0060dd0 Y: 00000000 Not tainted
PC: <page_referenced_one+0x4/0x108>
%G: f2e5cfc0 00000001 00000000 f25a0f88 f0166b34 c0000040 f2804000 c0000040
%O: 00000000 00000064 f0b4db08 f0b4df38 f2f02998 f2f02998 f28058f8 f00d8350
RPC: <__atomic_add_return+0x1c/0x2c>
%L: 404010c5 f01663fc f0166b3c 00000080 00000001 00000001 f0868000 f0194800
%I: f07ad0a0 ffffffc8 f28059cc 00000000 0000000e 00000000 f2805968 f0060f14
Caller[f0060f14]: page_referenced_anon+0x44/0x78
Caller[f00610cc]: page_referenced+0xb0/0xc4
Caller[f00573c8]: shrink_active_list+0x460/0x498
Caller[f00574a0]: shrink_zone+0xa0/0x114
Caller[f00575a0]: shrink_zones+0x8c/0xa4
Caller[f005768c]: try_to_free_pages+0xd4/0x1fc
Caller[f0051e08]: __alloc_pages+0x110/0x2d8
Caller[f005c15c]: do_anonymous_page+0x34/0x1b4
Caller[f005c6c4]: __handle_mm_fault+0xfc/0x26c
Caller[f001ae88]: do_sparc_fault+0x10c/0x3e0
Caller[f0010f28]: srmmu_fault+0x58/0x68
Caller[000fd920]: 0xfd920
Instruction DUMP: 81c7e008 81e80000 9de3bf90 <c2066004> c4062014 c6066048 90100018 84208003 e2064000
$ objdump -d /boot/vmlinuz-2.6.17-mph3
f0060dc8 <page_referenced_one>:
f0060dc8: 9d e3 bf 90 save %sp, -112, %sp
f0060dcc: c2 06 60 04 ld [ %i1 + 4 ], %g1
f0060dd0: c4 06 20 14 ld [ %i0 + 0x14 ], %g2
f0060dd4: c6 06 60 48 ld [ %i1 + 0x48 ], %g3
f0060dd8: 90 10 00 18 mov %i0, %o0
>From mm/rmap.c:
static int page_referenced_one(struct page *page,
struct vm_area_struct *vma, unsigned int *mapcount)
{
struct mm_struct *mm = vma->vm_mm; // <= Oopses here
I see a similar oops on 2.6.16-rc2. Unforunately I got rid of my older kernels,
so I cannot say when this first occurred.
Anyone familiar with this? I could do with some tips how to debug this
further. For me this points to an MMU issue. Right?
Thanks,
--
Martin
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