Neil,
I just upgraded an ia64 (Altix, 16k page size) test box to 2.6.24-rc3
from 2.6.23 and I get it panicing on boot in the umem driver.
[ 55.499300] v2.3 : Micro Memory(tm) PCI memory board block driver
[ 55.519331] ACPI: Unable to derive IRQ for device 0006:00:01.0
[ 55.528294] ACPI: PCI Interrupt 0006:00:01.0[A]: no GSI
[ 55.529214] umem 0006:00:01.0: Micro Memory(tm) controller found (PCI Mem Module (Battery Backup))
[ 55.530968] umem 0006:00:01.0: CSR 0xc00000080da00000 -> 0xc00000080da00000 (0x100)
[ 55.552881] umem 0006:00:01.0: Size 1048576 KB, Battery 1 Disabled (FAILURE), Battery 2 Disabled (FAILURE)
[ 55.559064] umem 0006:00:01.0: Window size 16777216 bytes, IRQ 64
[ 55.560131] umem 0006:00:01.0: memory already initialized
[ 55.561501] umema:<1>Unable to handle kernel NULL pointer dereference (address 000000000000002a)
[ 55.580231] swapper[0]: Oops 8813272891392 [1]
[ 55.581096] Modules linked in: umem qla2xxx
[ 55.582022]
[ 55.582023] Pid: 0, CPU 0, comm: swapper
[ 55.608663] psr : 0000101008026018 ifs : 8000000000000b9c ip : [<a0000002046e1ce0>] Not tainted
[ 55.610226] ip is at process_page+0x1c0/0x760 [umem]
[ 55.611107] unat: 0000000000000000 pfs : 0000000000000b9c rsc : 0000000000000003
[ 55.660528] rnat: e0000030023e5e40 bsps: e000003002563000 pr : a56911155aa696a5
[ 55.661866] ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c0270033f
[ 55.663204] csd : 0000000000000000 ssd : 0000000000000000
[ 55.712930] b0 : a0000002046e1b70 b6 : a0000002046e1b20 b7 : a00000010008d300
[ 55.714267] f6 : 1003e0000060100000000 f7 : 1003e0000000000400000
[ 55.715395] f8 : 1003e0000000000180400 f9 : 1003e0000000080000000
[ 55.816292] f10 : 1003e0000000000000400 f11 : 1003e0000000000049919
[ 55.817422] r1 : a0000002046ebe80 r2 : a0000002046f7640 r3 : 0000000000000040
[ 55.818747] r8 : 0000000000000000 r9 : 0000000000000000 r10 : 0000000000000000
[ 55.866550] r11 : 0000000000000003 r12 : a000000100bfbbb0 r13 : a000000100bf4000
[ 55.867886] r14 : 000000000000002a r15 : 0000000000000000 r16 : 0000000000000003
[ 55.894776] r17 : a0000002046e5630 r18 : 0000000000000000 r19 : 0000000000000003
[ 55.896113] r20 : e00000398c980030 r21 : e000003988381f40 r22 : 0000000000000000
[ 55.897450] r23 : 0000000000000001 r24 : 0000000000000001 r25 : e000003988381f28
[ 55.927571] r26 : 0000000000000001 r27 : 0000000000000000 r28 : 0000000000040000
[ 55.928734] r29 : 00000000cf0c01d0 r30 : e00000398c980038 r31 : 0000000000000000
[ 55.930075]
[ 55.930077] Call Trace:
[ 56.031008] [<a000000100015e00>] show_stack+0x80/0xa0
[ 56.031010] sp=a000000100bfb780 bsp=a000000100bf5238
[ 56.033460] [<a0000001000166f0>] show_regs+0x870/0x8a0
[ 56.033462] sp=a000000100bfb950 bsp=a000000100bf51d8
[ 56.093627] [<a00000010003e830>] die+0x210/0x3a0
[ 56.093629] sp=a000000100bfb950 bsp=a000000100bf5190
[ 56.213913] [<a00000010006eca0>] ia64_do_page_fault+0x9c0/0xb00
[ 56.213915] sp=a000000100bfb950 bsp=a000000100bf5138
[ 56.231427] [<a00000010000b640>] ia64_leave_kernel+0x0/0x280
[ 56.231429] sp=a000000100bfb9e0 bsp=a000000100bf5138
[ 56.278001] [<a0000002046e1ce0>] process_page+0x1c0/0x760 [umem]
[ 56.278004] sp=a000000100bfbbb0 bsp=a000000100bf5058
[ 56.280476] [<a0000001000dab30>] tasklet_action+0x270/0x360
[ 56.280478] sp=a000000100bfbbb0 bsp=a000000100bf5018
[ 56.370160] [<a0000001000d9a60>] __do_softirq+0x200/0x240
[ 56.370162] sp=a000000100bfbbb0 bsp=a000000100bf4f80
[ 56.476607] [<a0000001000d9b10>] do_softirq+0x70/0xc0
[ 56.476609] sp=a000000100bfbbb0 bsp=a000000100bf4f20
[ 56.478889] [<a0000001000d9be0>] irq_exit+0x80/0xc0
[ 56.478891] sp=a000000100bfbbb0 bsp=a000000100bf4f08
[ 56.529780] [<a000000100012b90>] ia64_handle_irq+0x1b0/0x3c0
[ 56.529782] sp=a000000100bfbbb0 bsp=a000000100bf4e98
[ 56.636341] [<a00000010000b640>] ia64_leave_kernel+0x0/0x280
[ 56.636343] sp=a000000100bfbbb0 bsp=a000000100bf4e98
[ 56.638823] [<a000000100017140>] default_idle+0x1a0/0x1c0
[ 56.638825] sp=a000000100bfbd80 bsp=a000000100bf4e30
[ 56.689924] [<a000000100015a70>] cpu_idle+0x210/0x440
[ 56.689926] sp=a000000100bfbe20 bsp=a000000100bf4db8
[ 56.796362] [<a000000100928850>] rest_init+0x110/0x140
[ 56.796364] sp=a000000100bfbe20 bsp=a000000100bf4da0
[ 56.798668] [<a000000100b49d20>] start_kernel+0x7c0/0x880
[ 56.798670] sp=a000000100bfbe20 bsp=a000000100bf4d28
[ 56.850239] [<a000000100930670>] __kprobes_text_end+0x6d0/0x6f0
[ 56.850241] sp=a000000100bfbe30 bsp=a000000100bf4c40
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
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