Re: 2.6.16-rc1-mm3

[Nick Piggin <nickpiggin@yahoo.com.au>]

Michal Piotrowski wrote:
> Hi,
> 
> On 26/01/06, Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> 
>>Nick Piggin wrote:
>>Sorry, wrong patch.
>>
>>Note the warnings you are seeing should not result in memory
>>corruption, but will result in the given hugepage leaking.
>>
>>--
>>SUSE Labs, Novell Inc.
>>
>>
>>Index: linux-2.6/include/linux/mm.h
>>===================================================================
>>--- linux-2.6.orig/include/linux/mm.h
>>+++ linux-2.6/include/linux/mm.h
>>@@ -294,6 +294,8 @@ struct page {
>>  */
>> static inline int put_page_testzero(struct page *page)
>> {
>>+       if (unlikely(PageCompound(page)))
>>+               page = (struct page *)page_private(page);
>>        BUG_ON(atomic_read(&page->_count) == 0);
>>        return atomic_dec_and_test(&page->_count);
>> }
>>
>>
>>
> 
> 
> Now I have got this:
> 
> BUG: unable to handle kernel paging request at virtual address eaa34b3c
>  printing eip:
> b0161cdd
> *pde = 0048a067
> *pte = 3aa34000
> Oops: 0000 [#1]
> PREEMPT SMP DEBUG_PAGEALLOC
> last sysfs file: /devices/pci0000:00/0000:00:1d.1/usb3/idVendor
> Modules linked in: snd_intel8x0 snd_ac97_codec snd_ac97_bus
> snd_pcm_oss snd_mixer_oss snd_pcm snd_timer ide_cd cdrom intel_agp
> agpgart snd i2c_i801 hw_random soundcore snd_page_alloc unix
> CPU:    0
> EIP:    0060:[<b0161cdd>]    Not tainted VLI
> EFLAGS: 00010282   (2.6.16-rc1-mm3 #4)
> EIP is at do_path_lookup+0x22b/0x259
> eax: eaa34b20   ebx: eb328000   ecx: 00000000   edx: eb328f4c
> esi: ffffff9c   edi: fffffffe   ebp: eb328f24   esp: eb328f0c
> ds: 007b   es: 007b   ss: 0068
> Process udevd (pid: 731, threadinfo=eb328000 task=eb30ca80)
> Stack: <0>00000000 eb5cb000 b015fab1 eb5cb000 eb5cb000 00000000
> eb328f40 b01621f3
>        eb328f4c ffffff9c afbf6dec afbf6dec 00000100 eb328f9c b015bf69 eb328f4c
>        eaa34b20 b23d5f28 00000000 eb329003 b015f8ce 00000000 00000001 00000000
> Call Trace:
>  [<b0103917>] show_stack_log_lvl+0xaa/0xb5
>  [<b0103a54>] show_registers+0x132/0x19d
>  [<b0103d91>] die+0x171/0x1fb
>  [<b02ab110>] do_page_fault+0x3be/0x568
>  [<b010343f>] error_code+0x4f/0x54
>  [<b01621f3>] __user_walk_fd+0x2d/0x41
>  [<b015bf69>] sys_readlinkat+0x26/0x93
>  [<b015bfe9>] sys_readlink+0x13/0x15
>  [<b01028bf>] sysenter_past_esp+0x54/0x75
> Code: 00 83 c0 04 e8 9a 82 14 00 8b 03 c7 80 e4 01 00 00 00 00 00 00
> 8b 55 08 8b 45 ec e8 55 fa ff ff 89 c7 8b 55 08 8b 02 85 c0 74 24 <8b>
> 50 1c 85 d2 74 1d b8 00 f0 ff ff 21 e0 8b 00 83 b8 d4 04 00
>  <6>ACPI: PCI Interrupt 0000:02:05.0[A] -> GSI 22 (level, low) -> IRQ 21
> 
> Here is dmesg:
> http://www.stardust.webpages.pl/files/mm/2.6.16-rc1-mm3/mm-dmesg2
> 
> Here is config
> http://www.stardust.webpages.pl/files/mm/2.6.16-rc1-mm3/mm-config
> 
> Regards,
> Michal Piotrowski
> 

Thanks for testing Michal. Andrew this one looks unrelated -
have you seen anything similar? Any ideas?

Nick

-- 
SUSE Labs, Novell Inc.
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