Messages in this thread | | | Date | Wed, 29 Feb 2012 17:12:56 +0800 | Subject | Re: Random process lockup on ARM board: alsa-lib-1.0.25, FUTEX_WAIT_PRIVATE | From | Huang Shijie <> |
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Hi ,
I meet a similar problem with the latest futex code.
I play the video and the processes will hang at the futex.
BR Huang Shijie
On Fri, Feb 24, 2012 at 8:29 AM, Jonathan Andrews <jon@jonshouse.co.uk> wrote: > Using kernel 3.2.5 with alsa-lib 1.0.25, all compiled with generic > Debian arm-linux-gnueabi toolchain. > > arm-linux-gnueabi-gcc (Debian 4.3.2-1.1) 4.3.2 > Was used to build kernel, alsa-lib and application. > > Changing gcc version, kernel version or alsa-lib version makes the > problem worse or better, but ALL versions seem to suffer this problem. I > have also seen it once on Intel (but only once so far). > > Something seeks broken at a lower layer than im using. I simply don't > have the skill to debug it. > > The hardware is a USB cm109 audio adapter, but the problem seems to show > on more than this one driver. > > The audio application writing to alsa will freezes at random intervals, > infrequent at the moment, last one was after runtime 20H 37M 29S. Two > processes are running, one reading from the sound device and one writing > to the sound device. I am not using threading or anything very clever > just generic alsa functions. > > This is the only diagnostic I can generate so far as running the > application under strace slows it to the point it no longer functions > enough to generate the problem. > > ARM / # strace -p 417 > Process 417 attached - interrupt to quit > futex(0x175734, FUTEX_WAIT_PRIVATE, 2, NULL^C <unfinished ...> > Process 417 detached > > ARM / # uname -a > Linux (none) 3.2.5 #2 Wed Feb 22 17:11:52 GMT 2012 armv4tl GNU/Linux > ARM / # uptime > 22:36:19 up 22:36, 0 users, load average: 0.15, 0.16, 0.18 > ARM / # cat /proc/cpuinfo > Processor : ARM920T rev 0 (v4l) > BogoMIPS : 199.06 > Features : swp half thumb crunch > CPU implementer : 0x41 > CPU architecture: 4T > CPU variant : 0x1 > CPU part : 0x920 > CPU revision : 0 > > > Any help welcome. > > Thanks, > Jon > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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