Sorry, I have not provided the kernel version. Kernel version is 2.6.35. However, wait_for_avail() does not have the code similar to the one provided in the patch below. I will give a try.
-----Original Message----- From: Arjan van de Ven [mailto:arjan@infradead.org] Sent: Monday, September 05, 2011 11:23 PM To: Nallasellan, Singaravelan Cc: alsa-devel@alsa-project.org; linux-kernel@vger.kernel.org Subject: Re: Player Thread is not woken after period elapsed
On Mon, 5 Sep 2011 23:08:53 +0530 "Nallasellan, Singaravelan" singaravelan.nallasellan@intel.com wrote:
Hi,
When I tried to root cause a glitch in the audio playback, I found a weird behavior.
User thread which invokes the writei function which in turn invokes a kernel function which waits for the free buffer to write the audio data. This kernel function adds this thread to a wake(sleep) queue and calls a schedule_timeout (msecs_to_jiffies(10000)).
actually it doesn't... you must be on some really really old kernel or something.
Will you provide some hint on how to go about identifying the root cause?
https://lkml.org/lkml/2011/9/5/201