On Tue, Mar 29, 2011 at 10:36 PM, Maxin John [off-list ref] wrote:

Hi,

I have prepared the combined patch for kmemleak porting to MIPS. After
applying the patch and enabling the kmemleak in Kernel, I can see one
kernel memleak reported during booting itself:
..
..

TCP cubic registered
NET: Registered protocol family 17
NET: Registered protocol family 15
kmemleak: Kernel memory leak detector initialized
rtc_cmos rtc_cmos: setting system clock to 2011-03-29 18:20:41 UTC (1301422841)
kmemleak: Automatic memory scanning thread started
EXT3-fs: barriers not enabled
kjournald starting.  Commit interval 5 seconds
EXT3-fs (hda1): mounted filesystem with ordered data mode
VFS: Mounted root (ext3 filesystem) readonly on device 3:1.
Freeing prom memory: 956k freed
Freeing unused kernel memory: 244k freed
modprobe: FATAL: Could not load
/lib/modules/2.6.38-08826-g1788c20-dirty/modules.dep: No such file or
directory

INIT: version 2.86 booting
Starting the hotplug events dispatcher: udevdudevd (863):
/proc/863/oom_adj is deprecated, please use /proc/863/oom_score_adj
instead.
.
Synthesizing the initial hotplug events...done.
Waiting for /dev to be fully populated...kmemleak: 1 new suspected
memory leaks (see /sys/kernel/debug/kmemleak)
....
....

debian-mips:~#
debian-mips:~# mount -t debugfs nodev /sys/kernel/debug/
debian-mips:~#  cat /sys/kernel/debug/kmemleak
unreferenced object 0x8f90d000 (size 4096):
 comm "swapper", pid 1, jiffies 4294937330 (age 815.000s)
 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:
   [<80529644>] alloc_large_system_hash+0x2f8/0x410
   [<805383b4>] udp_table_init+0x4c/0x158
   [<805384dc>] udp_init+0x1c/0x94
   [<8053889c>] inet_init+0x184/0x2a0
   [<80100584>] do_one_initcall+0x174/0x1e0
   [<8051f348>] kernel_init+0xe4/0x174
   [<80103d4c>] kernel_thread_helper+0x10/0x18


The standard kmemleak test case is behaving as expected. Based on
this, I think, we can say that the kmemleak support for MIPS is
working.

Please let me know your comments.

This looks good to me.

thanks,
Daniel.