Re: Bad page state at free_hot_cold_page

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Hi,

"BJörn Lindqvist" <bjourne@xxxxxxxxx> writes:

> Hi,
>
> I have a 2.6.5-7 kernel and I sporadically get these kernel messages:
>
>     kernel: Bad page state at free_hot_cold_page (in process 'beam',
> page c1a95320)
>     kernel: flags:0x40020118 mapping:f401adc0 mapped:0 count:0
> private:0x00000000
>     kernel: Backtrace:
>     kernel: Call Trace:
>     kernel:  [<c01448ed>] bad_page+0x5d/0xa0
>     kernel:  [<c0144c20>] free_hot_cold_page+0x60/0xf0
>     kernel:  [<c014e3e2>] unmap_vmas+0x2f2/0x5c0
>     kernel:  [<c0150c8b>] exit_mmap+0x5b/0x180
>     kernel:  [<c011f115>] mmput+0x45/0x60
>     kernel:  [<c016909c>] flush_old_exec+0x18c/0x820
>     kernel:  [<c01855c7>] load_elf_binary+0x387/0x145c
>     kernel:  [<c0141599>] generic_file_read+0x99/0xc0
>     kernel:  [<c011949e>] pgd_alloc+0xe/0x40
>     kernel:  [<c0168bd1>] search_binary_handler+0x61/0x200
>     kernel:  [<c016a16f>] do_execve+0x1cf/0x350
>     kernel:  [<c010663a>] sys_execve+0x2a/0x60
>     kernel:  [<c0107db9>] sysenter_past_esp+0x52/0x79
>     kernel:
>     kernel: Trying to fix it up, but a reboot is needed
>
> I have googled around and it seems that the "Bad page state at
> free_hot_cold_page" is quite common. But I haven't found any
> satisfying explanation for it. The traceback and the flags, mapped,
> count and private attributes are always the same which suggests that
> this problem ought to be reproducible somehow.

Could you try to reproduce this error with a more recent kernel version?
The one you run is pretty old and it is not unlikely that this bug has
already been fixed.

	Hannes

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