Re: problem with kmemleak

[ttlxzz ccc]

I am chenxi, too :)

On Thu, May 12, 2011 at 5:44 PM, Maxin B John <maxin.john@xxxxxxxxx> wrote:
> Hi,
>
> Could you please share some more information about your setup ?
>
> Regards,
> Maxin
>
> On Thu, May 12, 2011 at 4:13 AM, ttlxzz ccc <boyzccc@xxxxxxxxx> wrote:
>> help~~~ïï please ïthxïï
>>
>> On Thu, May 12, 2011 at 10:06 AM, ttlxzz ccc <boyzccc@xxxxxxxxx> wrote:
>>> Hi, all:
>>>
>>>
>>>
>>> I just want to use kmemleak, so I make the CONFIG_DEBUG_KMEMLEAK and
>>> CONFIG_DEBUG_FS on, mount the debugfs.
>>>
>>> But when I insmod mm/kmemleak-test.ko, echo scan >
>>> /sys/kernel/debug/kmemleak and cat /sys/kernel/debug/kmemleak. I just
>>> see this:
>>>
>>> unreferenced object 0xffffc90012d21000 (size 64):
>>>
>>> Âcomm "insmod", pid 13092, jiffies 4298369684
>>>
>>> Âhex dump (first 32 bytes):
>>>
>>> Â Â00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Â................
>>>
>>> Â Â00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Â................
>>>
>>> Âbacktrace:
>>>
>>> Â Â[<ffffffffffffffff>] 0xffffffffffffffff
>>>
>>> unreferenced object 0xffffc90012d24000 (size 64):
>>>
>>> Âcomm "insmod", pid 13092, jiffies 4298369684
>>>
>>> Âhex dump (first 32 bytes):
>>>
>>> Â Â00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Â................
>>>
>>> Â Â00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Â................
>>>
>>> Âbacktrace:
>>>
>>> Â Â[<ffffffffffffffff>] 0xffffffffffffffff
>>>
>>> unreferenced object 0xffffc90012d27000 (size 64):
>>>
>>> Âcomm "insmod", pid 13092, jiffies 4298369684
>>>
>>> Âhex dump (first 32 bytes):
>>>
>>> Â Â00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Â................
>>>
>>> Â Â00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Â................
>>>
>>> Âbacktrace:
>>>
>>> Â Â[<ffffffffffffffff>] 0xffffffffffffffff
>>>
>>> There is no other backtrace except [<ffffffffffffffff>]
>>> 0xffffffffffffffff. Then I read the mm/kmemleak.c. In
>>> kmemleak_seq_show(), I find that the object->trace_len is 1.
>>>
>>>
>>>
>>> How can I get the full backtrace?
>>>
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