[no subject]

[ttlxzz ccc]

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):

  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

unreferenced object 0xffffc90012d24000 (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

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

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?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/