linux-kernel - Re: Random process lockup on ARM board: alsa-lib-1.0.25, FUTEX_WAIT

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Message-ID: <CAMiH66HUKgPA5LAT_WsWZR6R0qfn6Q0aAOi6iYMEFonODMvPxQ@mail.gmail.com>
Date:	Thu, 8 Mar 2012 16:43:30 +0800
From:	Huang Shijie <shijie8@...il.com>
To:	Darren Hart <dvhart@...ux.intel.com>
Cc:	jon@...shouse.co.uk, linux-kernel@...r.kernel.org
Subject: Re: Random process lockup on ARM board: alsa-lib-1.0.25, FUTEX_WAIT_PRIVATE

On Thu, Mar 8, 2012 at 3:40 PM, Darren Hart <dvhart@...ux.intel.com> wrote:
>
>
> On 03/07/2012 08:24 PM, Huang Shijie wrote:
>> hi,
>>
>> On Thu, Mar 8, 2012 at 11:36 AM, Darren Hart <dvhart@...ux.intel.com> wrote:
>>>
>>>
>>> On 03/07/2012 06:28 PM, Huang Shijie wrote:
>>>> Hi,
>>>>
>>>> On Thu, Mar 8, 2012 at 4:07 AM, Darren Hart <dvhart@...ux.intel.com> wrote:
>>>>>
>>>>>
>>>>> On 02/29/2012 01:12 AM, Huang Shijie wrote:
>>>>>> Hi ,
>>>>>>
>>>>>> I meet a similar problem with the latest futex code.
>>>>>>
>>>>>> I play the video and the processes will hang at the futex.
>>>>>
>>>>> Are either of you able to bisect the kernel? At the very least can you
>>>>
>>>> I finially found my arch/arm/include/asm/futex.h is not the
>>>> latest, so i updated the header.
>>>
>>> Just make sure it matches your kernel version.
>>>
>>>>
>>>> And the futex issue is gone now. But a dataAbort issue appears, I am
>>>> not sure whether it caused by the futex patch.
>>>> I am debugging it now.
>>>
>>> Which APIs are you using that make the futex syscall?
>>>
>>
>> futex_wait().
>
> You are calling the futex syscall directly from your application?
>

The application call futex(), but i ever hung at futex_wait().

Huang Shijie
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