new kmemleak w/ latest ACPI updates

new kmemleak w/ latest ACPI updates

[Toralf Förster]

Hello,

running git kernel v2.6.34-rc3-500-g0eddb51 I observe this new kmemleak :

unreferenced object 0xcd3fe6a0 (size 32):
  comm "pm-suspend", pid 21698, jiffies 9344750 (age 1363.181s)
  hex dump (first 32 bytes):
    34 32 54 34 36 34 34 00 34 32 54 34 36 34 34 00  42T4644.42T4644.
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<c122cb0d>] kmemleak_alloc+0x3d/0x60
    [<c109c8c2>] __kmalloc+0xf2/0x120
    [<c1162c0f>] acpi_ut_create_buffer_object+0x49/0x83
    [<c115303b>] acpi_ex_read_data_from_field+0xbe/0x12b
    [<c1157988>] acpi_ex_resolve_node_to_value+0x154/0x1c8
    [<c1153950>] acpi_ex_resolve_to_value+0x1bc/0x1c8
    [<c114e9c3>] acpi_ds_evaluate_name_path+0x6e/0xe3
    [<c114d8c0>] acpi_ds_exec_end_op+0x88/0x368
    [<c115da04>] acpi_ps_parse_loop+0x701/0x855
    [<c115cd0a>] acpi_ps_parse_aml+0x87/0x261
    [<c115e0df>] acpi_ps_execute_method+0x18e/0x247
    [<c1159dcf>] acpi_ns_evaluate+0xcb/0x17c
    [<c115990c>] acpi_evaluate_object+0x10e/0x1eb
    [<f80cb37a>] acpi_battery_update+0xb3/0x200 [battery]
    [<f80cb54e>] acpi_battery_resume+0x20/0x24 [battery]
    [<c114603a>] acpi_device_resume+0x1e/0x24

which might be introduced by the ACPi changes since f5284e I think.

-- 
MfG/Sincerely
Toralf Förster

pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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Re: new kmemleak w/ latest ACPI updates

[Lin Ming]

On Sun, 2010-04-11 at 03:02 +0800, Toralf Förster wrote:
> Hello,
> 
> running git kernel v2.6.34-rc3-500-g0eddb51 I observe this new kmemleak :
> 
> unreferenced object 0xcd3fe6a0 (size 32):
>   comm "pm-suspend", pid 21698, jiffies 9344750 (age 1363.181s)
>   hex dump (first 32 bytes):
>     34 32 54 34 36 34 34 00 34 32 54 34 36 34 34 00  42T4644.42T4644.
>     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>   backtrace:
>     [<c122cb0d>] kmemleak_alloc+0x3d/0x60
>     [<c109c8c2>] __kmalloc+0xf2/0x120
>     [<c1162c0f>] acpi_ut_create_buffer_object+0x49/0x83
>     [<c115303b>] acpi_ex_read_data_from_field+0xbe/0x12b
>     [<c1157988>] acpi_ex_resolve_node_to_value+0x154/0x1c8
>     [<c1153950>] acpi_ex_resolve_to_value+0x1bc/0x1c8
>     [<c114e9c3>] acpi_ds_evaluate_name_path+0x6e/0xe3
>     [<c114d8c0>] acpi_ds_exec_end_op+0x88/0x368
>     [<c115da04>] acpi_ps_parse_loop+0x701/0x855
>     [<c115cd0a>] acpi_ps_parse_aml+0x87/0x261
>     [<c115e0df>] acpi_ps_execute_method+0x18e/0x247
>     [<c1159dcf>] acpi_ns_evaluate+0xcb/0x17c
>     [<c115990c>] acpi_evaluate_object+0x10e/0x1eb
>     [<f80cb37a>] acpi_battery_update+0xb3/0x200 [battery]
>     [<f80cb54e>] acpi_battery_resume+0x20/0x24 [battery]
>     [<c114603a>] acpi_device_resume+0x1e/0x24
> 
> which might be introduced by the ACPi changes since f5284e I think.
> 

Hi, 

I can't reproduce this.

Could you please send the acpidump output?

Thanks,
Lin Ming

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Re: new kmemleak w/ latest ACPI updates

[Lin Ming]

On Tue, 2010-04-13 at 15:39 +0800, Toralf Förster wrote:
> Lin Ming wrote at 04:03:16
> > On Sun, 2010-04-11 at 03:02 +0800, Toralf Förster wrote:
> > > Hello,
> > > 
> > > running git kernel v2.6.34-rc3-500-g0eddb51 I observe this new kmemleak :
> > > 
> > 
> > Could you please send the acpidump output?
> 
> Attached,

Thanks.
I'll try to reproduce this memory leak in the simulator(AcpiExec).

The only ACPICA commit between f5284e..0eddb51 is bf02bd2

Could you revert that commit and see if the leak is gone?

Lin Ming

> 
> btw suspend2ram (system in docking station) and wakeup (out of the docking 
> station with external VGA monitor) doesn't work too since that commit (but 
> might be related to different root cause).
> 
> 

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