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SubjectRe: [3.1-rc6] kmalloc(64) leak from IDE
On Thu, Sep 22, 2011 at 01:23:37PM -0700, Simon Kirby wrote:
> Yes, that seems to have made it stop complaining about the IDE path.

Good, thanks for testing. It would be great if you left it running for
a couple of days like this to see whether there aren't any other issues
with the patch. I'll send it with a proper description to Dave soonish
since this is a real bug.

> All I see from kmemleak now is:

Yep, not IDE-related. Adding linux-acpi.

> unreferenced object 0xe7481a00 (size 256):
> comm "swapper", pid 1, jiffies 4294892509 (age 515.560s)
> hex dump (first 32 bytes):
> 00 00 00 28 ff ff ef ff 60 78 4e e7 00 02 00 00 ...(....`xN.....
> 47 01 f8 0c f8 0c 01 08 00 00 00 00 0c 03 00 00 G...............
> backtrace:
> [<c1495c47>] kmemleak_alloc+0x27/0x50
> [<c10b3563>] __kmalloc+0xf3/0x1c0
> [<c149e0b0>] pci_acpi_scan_root+0x11e/0x272
> [<c149916b>] acpi_pci_root_add+0x163/0x256
> [<c12adddc>] acpi_device_probe+0x3a/0xf4
> [<c1302e38>] driver_probe_device+0x68/0x160
> [<c1302fb9>] __driver_attach+0x89/0x90
> [<c1302718>] bus_for_each_dev+0x48/0x70
> [<c1302cc9>] driver_attach+0x19/0x20
> [<c130213f>] bus_add_driver+0x17f/0x240
> [<c1303345>] driver_register+0x65/0x120
> [<c12af273>] acpi_bus_register_driver+0x3a/0x3f
> [<c16d421f>] acpi_pci_root_init+0x1b/0x2a
> [<c1001030>] do_one_initcall+0x30/0x160
> [<c16b920b>] kernel_init+0x78/0x10c
> [<c14a1b76>] kernel_thread_helper+0x6/0xd
> unreferenced object 0xe74e7860 (size 16):
> comm "swapper", pid 1, jiffies 4294892509 (age 515.560s)
> hex dump (first 16 bytes):
> 50 43 49 20 42 75 73 20 30 30 30 30 3a 30 30 00 PCI Bus 0000:00.
> backtrace:
> [<c1495c47>] kmemleak_alloc+0x27/0x50
> [<c10b3563>] __kmalloc+0xf3/0x1c0
> [<c1290cce>] kvasprintf+0x2e/0x50
> [<c1290d01>] kasprintf+0x11/0x20
> [<c149e0da>] pci_acpi_scan_root+0x148/0x272
> [<c149916b>] acpi_pci_root_add+0x163/0x256
> [<c12adddc>] acpi_device_probe+0x3a/0xf4
> [<c1302e38>] driver_probe_device+0x68/0x160
> [<c1302fb9>] __driver_attach+0x89/0x90
> [<c1302718>] bus_for_each_dev+0x48/0x70
> [<c1302cc9>] driver_attach+0x19/0x20
> [<c130213f>] bus_add_driver+0x17f/0x240
> [<c1303345>] driver_register+0x65/0x120
> [<c12af273>] acpi_bus_register_driver+0x3a/0x3f
> [<c16d421f>] acpi_pci_root_init+0x1b/0x2a
> [<c1001030>] do_one_initcall+0x30/0x160
>
> ...which is probably a separate, non-recurring leak.
>
> > Also, I'm sure you know IDE is deprecated, so what are the chances of
> > moving this box to libata? Also, can you send me your .config pls?
>
> Yeah, I was going to get around to that eventually. :) Config (and
> earlier kmemleak output) here: http://0x.ca/sim/ref/3.1-rc6-blue/

Ok, thanks.

--
Regards/Gruss,
Boris.


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