On Sunday, 4 of November 2007, Nigel Cunningham wrote:
> Hi all.
>
> Please excuse me if this has already been answered. I'm not currently subscribed to LKML.
>
> I've just been preparing a new tux-on-ice release against Linus' current tree, and encountered a failure to freeze pid 1 when seeking to resume, using an initrd:
>
> [ 74.192734] Freezing of tasks failed after 19.99 seconds (1 tasks refusing to freeze):
> [ 74.193502] task PC stack pid father
> [ 74.193504] swapper S ffff810002023030 4968 1 0
> [ 74.193512] ffff81000203fdb0 0000000000000046 ffff810002023040 ffff810003249140
> [ 74.194296] ffff81000203fd80 ffffffff803150a1 ffff81000203fdb0 ffff810002023180
> [ 74.195087] ffff810002023030 0000000000000004 0000000000000001 0000000000000001
> [ 74.195860] Call Trace:
> [ 74.196123] [<ffffffff803150a1>] security_task_wait+0x11/0x20
> [ 74.196692] [<ffffffff802320cd>] do_wait+0x51d/0xda0
> [ 74.197187] [<ffffffff802292f0>] default_wake_function+0x0/0x10
> [ 74.197772] [<ffffffff8023297c>] sys_wait4+0x2c/0x30
> [ 74.198264] [<ffffffff805f4bb5>] initrd_load+0x175/0x370
> [ 74.198794] [<ffffffff805f211f>] prepare_namespace+0x8f/0x1d0
> [ 74.199362] [<ffffffff805f174d>] kernel_init+0x1ad/0x2b0
> [ 74.199889] [<ffffffff8047e526>] _spin_unlock_irq+0x26/0x60
> [ 74.200439] [<ffffffff8022afc7>] finish_task_switch+0x67/0xc0
> [ 74.201008] [<ffffffff8020c548>] child_rip+0xa/0x12
> [ 74.201494] [<ffffffff80364770>] acpi_os_acquire_lock+0x9/0xb
> [ 74.202063] [<ffffffff805f15a0>] kernel_init+0x0/0x2b0
> [ 74.202570] [<ffffffff8020c53e>] child_rip+0x0/0x12
>
> I believe it might be related to pid namespaces, but am not completely sure yet (will do a git bisect if needs be).
>
> So, then, I'm writing to ask: Is this a known issue? Is there any fix already available that I've not found in my googling?
Not known to me and I haven't tried the PID namespaces yet.
Greetings,
Rafael
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