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Subject: Re: 2.6.9rc2-mm4 oops
From: Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>
To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org, mingo@elte.hu,
       Len Brown <len.brown@intel.com>, acpi-devel@lists.sourceforge.net,
       Bernhard Rosenkraenzer <bero@arklinux.org>,
       Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU>
In-Reply-To: <200409301704.28573.bjorn.helgaas@hp.com>
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On Thu, 2004-09-30 at 16:04, Bjorn Helgaas wrote:
> On Thursday 30 September 2004 3:22 pm, Bjorn Helgaas wrote:
> > Fernando Pablo Lopez-Lezcano <nando@ccrma.Stanford.EDU> wrote:
> > > inserting floppy driver for 2.6.8.1-1.520.1nov.rhfc2.ccrma
> > > Unable to handle kernel paging request at virtual address f8881920
> > >  printing eip:
> > > c0251d3d
> > > *pde = 37f5f067
> > > Oops: 0002 [#1]
> > > PREEMPT 
> > > Modules linked in: floppy(U) sg(U) dm_mod(U) uhci_hcd(U) ehci_hcd(U)
> > > button(U) battery(U) asus_acpi(U) ac(U) ext3(U) jbd(U) raid5(U) xor(U)
> > > sata_via(U) sata_promise(U) libata(U) sd_mod(U) scsi_mod(U)
> > > CPU:    0
> > > EIP:    0060:[<c0251d3d>]    Not tainted VLI
> > > EFLAGS: 00010246   (2.6.8.1-1.520.1nov.rhfc2.ccrma) 
> > > EIP is at acpi_bus_register_driver+0xd2/0x165
> 
> Like Pierre, I was able to reproduce this with DEBUG_PAGEALLOC.
> I found a struct acpi_driver in hpet.c that was erroneously marked
> __init, and the attached patch fixed the oops for me.  Can you give
> this a whirl?

Sorry, I did, and still get the oops. This is it this time (looks the
same to me):

inserting floppy driver for 2.6.8.1-1.520.1nov.rhfc2.ccrma
Unable to handle kernel paging request at virtual address f8881920
 printing eip:
c0251d3d
*pde = 37f5f067
Oops: 0002 [#1]
PREEMPT 
Modules linked in: floppy(U) sg(U) dm_mod(U) uhci_hcd(U) ehci_hcd(U)
button(U) battery(U) asus_acpi(U) ac(U) ext3(U) jbd(U) raid5(U) xor(U)
sata_via(U) sata_promise(U) libata(U) sd_mod(U) scsi_mod(U)
CPU:    0
EIP:    0060:[<c0251d3d>]    Not tainted VLI
EFLAGS: 00010246   (2.6.8.1-1.520.1nov.rhfc2.ccrma) 
EIP is at acpi_bus_register_driver+0xd2/0x165
eax: f8881920   ebx: f88eefe0   ecx: c03d6b40   edx: f88ebd30
esi: ffffffed   edi: f6eb8000   ebp: c03d9460   esp: f6eb8f5c
ds: 007b   es: 007b   ss: 0068
Process modprobe (pid: 2119, threadinfo=f6eb8000 task=f6dc4640)
Stack: c03d94a0 f88e9126 00000015 00000014 f8870bc1 c03d94a0 f88ef280
f6eb8000 
       c0129ef7 c03d94a0 f88ef280 f6eb8000 c03d9460 c014dd52 00000246
f62d1eac 
       f6e44c40 f6f16564 f6ea1c40 f6ea1c6c 00000000 b7fde008 0807a1a0
006a809d 
Call Trace:
 [<f88e9126>] acpi_floppy_init+0x16/0x50 [floppy]
 [<f8870bc1>] floppy_init+0x11/0x600 [floppy]
 [<c0129ef7>] printk+0x17/0x20
 [<c014dd52>] sys_init_module+0x252/0x3b0
 [<c0106afd>] sysenter_past_esp+0x52/0x71
Code: 00 00 00 a1 ec 67 3e c0 c7 05 78 67 3e c0 a0 7b 3a c0 c7 05 7c 67
3e c0 bd 01 00 00 89 1d ec 67 3e c0 c7 03 e8 67 3e c0 89 43 04 <89> 18
81 3d 68 67 3e c0 3c 4b 24 1d 74 1c 68 68 67 3e c0 68 bf 
 <6>note: modprobe[2119] exited with preempt_count 1
Debug: sleeping function called from invalid context at
include/linux/rwsem.h:43
in_atomic():1, irqs_disabled():0
 [<c0125652>] __might_sleep+0xa2/0xb0
 [<c012d222>] do_exit+0xa2/0x980
 [<c010775f>] die+0x2bf/0x2c0
 [<c012a0b6>] vprintk+0x1b6/0x340
 [<c011e1e4>] do_page_fault+0x314/0x56c
 [<c01d8155>] sysfs_new_dirent+0x25/0x80
 [<c01d81cd>] sysfs_make_dirent+0x1d/0x90
 [<c0172a29>] unmap_area_pmd+0x49/0x60
 [<c01d7d84>] sysfs_add_file+0x74/0xa0
 [<c0172bb0>] unmap_vm_area+0x30/0x80
 [<c0173136>] __vunmap+0xb6/0xf0
 [<c0129cf0>] call_console_drivers+0x80/0x110
 [<c011ded0>] do_page_fault+0x0/0x56c
 [<c0106cf9>] error_code+0x2d/0x38
 [<c0251d3d>] acpi_bus_register_driver+0xd2/0x165
 [<f88e9126>] acpi_floppy_init+0x16/0x50 [floppy]
 [<f8870bc1>] floppy_init+0x11/0x600 [floppy]
 [<c0129ef7>] printk+0x17/0x20
 [<c014dd52>] sys_init_module+0x252/0x3b0
 [<c0106afd>] sysenter_past_esp+0x52/0x71

I tried building without PREEMPT but there were some errors about
unknown symbols at the end, I'll try again tomorrow.

-- Fernando


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