[alsa-devel] Random process lockup on ARM board: alsa-lib-1.0.25, FUTEX_WAIT_PRIVATE

Clemens Ladisch clemens at ladisch.de
Sat Feb 18 21:36:15 CET 2012

Jonathan Andrews wrote:
> On Fri, 2012-02-17 at 21:04 +0000, Jonathan Andrews wrote:
>> # strace -p 443
>>> futex(0x4030e144, FUTEX_WAIT_PRIVATE, 2, NULL
>> locks up.  Stops, stalls ... fails to continue ....
>> Now tried several alsa-lib versions.  A clue would be nice?
>> What do I replace to fix this ?
> Now tried 2 kernels, 3 versions of alsalib still stalls.

The synchronization calls in alsa-lib shouldn't block unless you're
actually using several threads, and even then you wouldn't be able
to reproduce it so reliably.

Do you have a stack trace to find out where this is called from?

Can you confirm that pthread mutexes work on your board?


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