Re: çå: problem with kmemleak

[ttlxzz ccc]

Hi, Catalin=:)

I enable CONFIG_BACKTRACE_SELF_TEST and check the log

vim /var/log/kernel

and find the backtrace testing below:

May 15 13:48:54 db-sat-test05 kernel: ====[ backtrace testing ]===========
May 15 13:48:54 db-sat-test05 kernel: Testing a backtrace from process context.
May 15 13:48:54 db-sat-test05 kernel: The following trace is a kernel
self test and not a bug!
May 15 13:48:54 db-sat-test05 kernel: Pid: 1, comm: swapper Not
tainted 2.6.32_1-1-0-0 #7
May 15 13:48:54 db-sat-test05 kernel: Call Trace:
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8108b5f9>] ?
backtrace_regression_test+0x50/0x16a
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8117b143>] ?
proc_create_data+0xb3/0xe5
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8182d6e1>] ?
kallsyms_init+0x0/0x30
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8182d706>] ?
kallsyms_init+0x25/0x30
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff81009094>] ?
do_one_initcall+0x6c/0x1c0
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8181133a>] ?
kernel_init+0x2f5/0x381
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8100ca9a>] ? child_rip+0xa/0x20
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff81811045>] ?
kernel_init+0x0/0x381
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8100ca90>] ? child_rip+0x0/0x20
May 15 13:48:54 db-sat-test05 kernel: Testing a backtrace from irq context.
May 15 13:48:54 db-sat-test05 kernel: The following trace is a kernel
self test and not a bug!
May 15 13:48:54 db-sat-test05 kernel: Pid: 22, comm: ksoftirqd/6 Not
tainted 2.6.32_1-1-0-0 #7
May 15 13:48:54 db-sat-test05 kernel: Call Trace:
May 15 13:48:54 db-sat-test05 kernel:  <IRQ>  [<ffffffff8108b595>] ?
backtrace_test_irq_callback+0xd/0x21
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8105744e>] ?
tasklet_action+0x95/0xf8
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff81057034>] ?
__do_softirq+0xa9/0x154
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff81057892>] ?
ksoftirqd+0x0/0x16c
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8100cb9c>] ?
call_softirq+0x1c/0x28
May 15 13:48:54 db-sat-test05 kernel:  <EOI>  [<ffffffff8100e8c1>] ?
do_softirq+0x47/0xbc
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff81057917>] ?
ksoftirqd+0x85/0x16c
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8106b6e8>] ? kthread+0x9b/0xaa
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8100ca9a>] ? child_rip+0xa/0x20
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8106b64d>] ? kthread+0x0/0xaa
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffff8100ca90>] ? child_rip+0x0/0x20
May 15 13:48:54 db-sat-test05 kernel: Testing a saved backtrace.
May 15 13:48:54 db-sat-test05 kernel: The following trace is a kernel
self test and not a bug!
May 15 13:48:54 db-sat-test05 kernel:  [<ffffffffffffffff>] 0xffffffffffffffff
May 15 13:48:54 db-sat-test05 kernel: ====[ end of backtrace testing ]====

Is there something wrong with the backtrace testing so that I can't
get the full backtrace, plz?

thank you very much:)

On Fri, May 13, 2011 at 10:08 PM, Catalin Marinas
<catalin.marinas@xxxxxxx> wrote:
> On Fri, 2011-05-13 at 10:32 +0100, ttlxzz ccc wrote:
>> I have tested kmemleak on the x86 and x86_64 architecture again. There
>> is only
>>  backtrace:
>>
>>    [<ffffffffffffffff>] 0xffffffffffffffff
>>
>> unreferenced object 0xffffc90012d27000 (size 64):
>>
>>  comm "insmod", pid 13092, jiffies 4298369684
>>
>>  hex dump (first 32 bytes):
>>
>>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>>
>>    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>>
>>  backtrace:
>>
>>    [<ffffffffffffffff>] 0xffffffffffffffff
>>
>> But in the x86, there is full backtrace.
>
> Can you enable CONFIG_BACKTRACE_SELF_TEST and check whether the
> boot-time backtrace test goes ok?
>
> --
> Catalin
>
>
>
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